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Zaurusman
Dodge Dakota
10/09/2001
15:22:48
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 Subject: Hesitation
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Message:
Hey guys,
What're some culprits for hesitation? Especially when cold, my truck has a moment of hesitation in which it looses most of its power just short of the power band; it's been there for months but is especially bad now. Coil, cap, rotor, wires & plugs are all less than a few months old. I'm running premium to avoid knocking. 180 thermostat. Could it be carbon buildup or something? Any ideas appreciated.
TIA
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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98SPRTV6
Dodge Dakota
10/09/2001
15:45:27
|  RE: Hesitation
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I was having the same problem too, I decided to port & polish my throttle body and when I did I clean my Throttle position sensor and I believe the IAT sensor also before I reinstalled the throttle body!!
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Zaurusman
Dodge Dakota
10/09/2001
16:48:09
| RE: Hesitation
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With the exception of the porting and polishing, I did all this just previous to the ignition. Think it could be that with the slightly lost backpressure of my Gibson I now need a new TB to compensate? I do already have the K&N FIPK.
Who has a stock throttle body with a catback? Does yours hesitate too? Mebbe I should have replaced more than the muffler...
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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98SPRTV6
Dodge Dakota
10/09/2001
17:16:05
| RE: Hesitation
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I have stock exhaust with a hand ported and polished throttle body and I need more exhaust now, too much air going through!!
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jay
Dodge Dakota
10/09/2001
18:20:09
| RE: Hesitation
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Message:
my 2001 3.9 does the same thing, i have brand new everything. Borg & warner brass cap and rotor, dynomax muffler, accel 8.8mm 300+ wires, autolite plugs, homemade intake. Try resetting your computer, i haven't done this yet on mine but mine has done this since the day i bought it, but mine only does it when the engine is cold. Dealership told me it was normal and it was due to the fact that when the engine is cold it is running on the rich side.. Mine goes away once the engine hits about 130, probably causes the computer starts to lean it out by then.... is your hestitation kinda like a quick jerk sort of like ya just hit something, but not as hard obviously.... hahah ..... the tb could possibly help cause it may lean it out a bit more but i'm not 100% sure,, i was also thinking that if i changed my tailpipe out to a 2 1/2in. tailpipe that may help too because i too only swapped my muffler...what kinda e/t's are ya running in the quarter??? bernd told me most 3.9's run in the 17 range but last week i posted a 16.7 @ 80mph and backed it with a 16.89 and a 16.86... for some reason this truck seems exceptionally strong and even the dealers said the same thing.... exact quote from service tech " holy sh*t, that muthaf*cker is quick for a 3.9, i thought i was driving a 318 for a minute till i heard the exhaust , Well you must be one of the lucky ones" ...hmmmmmm interesting. Does your truck by chance make a funky clicking noise at idle because mine and my friends both do it, his is a 2000 and mine is a 2001, it's a constant click click click when you rev it it gets louder,,,, dealer says it's normal.... oh well
jay
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Garth
Dodge Dakota
10/09/2001
19:05:47
| RE: Hesitation
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If you check out this post it may answer some of your questions. There is a problem with the V6 motor and hesitation.
http://www.dodgedakota.net/boards/v6/44.html
Garth
2000 Quad Cab
3.9L V6 5 speed 4x4
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Zaurusman
Dodge Dakota
10/09/2001
19:14:35
|  RE: Hesitation
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I apologize in advance for the long post.
It sounds like what you've got, Jay. Does feel like it just hit something, like a huge puddle! It also went away once I ran it for a while; didn't think to check the temp guage; will run it later this evening with that in mind when it cools off. Also seems to "stutter" when it does that, and it stutters when driving away from where I parked.
I've now consulted my service manual but I cannot determine what this falls under:
Engine Loss Of Power <-- This mean all the time or just on occassion? Troubleshooting all THAT stuff would take a year and a day!
Engine Misses on Accelleration <-- Could that be the stuttering?
Here's my white-knuckle pale-faced bone-chilling fear: Is this the timing chain? I have a tad under 60K miles now, and I heard something disturbing this morning when it was cold. I heard a tick from ahead of the exhaust. Didn't come with every engine revolution, probably once or twice a second. And I had the air on for a few minutes today too, engine still cool I think, and it did the same thing and seemed to affect the compressor. What do y'all think? If it were the chain, though, wouldn't it persist in spite of engine temp?
Jay: If you're referring to what I think you're referring to, I think that's the fuel injectors. They tick along with the engine. Once mine got much loudeder and it turned out I had coolant in the oil due to a leaky thermostat.
My best run in the 1/4 was 17.268 in coolish weather with unavoidable wheelhop. Bet THAT was really good for my timing chain... Only mod then was a K&N FIPK; hope to be at 17 now but doubt it.
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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Zaurusman
Dodge Dakota
10/09/2001
19:17:52
| RE: Hesitation
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Message:
I'll test that, Garth, but I have a '98.
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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Zaurusman
Dodge Dakota
10/09/2001
22:03:46
|  RE: Hesitation
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Weeeeell, I guess I'm going to regap my plugs, check the cap & rotor, return to my stock coil and run a bunch of fuel injector cleaner. Hopefully this glitch is MY fault for a change. Truck ran outta gas a couple weeks ago when I discovered that my fuel level sensor was bad, so maybe it deposited some sediment in the fuel line or fuel rails or the such. Of course I won't have time to do most of this until the weekend, so I hope it doesn't get any worse. If that doesn't work, I'll replace my timing chain and if that's not it I'll pull the darned heads and see if the valves are pitted from the pinging. Those are the possibilities that most seem likely.
Thanks for the responses to my panic-induced overreaction to the situation, guys! :-)
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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jay
Dodge Dakota
10/10/2001
17:25:23
| RE: Hesitation
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did you ever think that you may have a misindexed distributor, this is just a thought but you never know
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Zaurusman
Dodge Dakota
10/12/2001
18:28:12
| RE: Hesitation
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Well, as an update, the problem has mysteriously disappeared. I think it's the cat, and something was loose in there and blew out eventually. Heck, it's my third one. But it could be something else. I took off the weather stripping at the back of the hood several months ago, told it would work similar to a cowl hood that way and keep my engine cooler, and replaced it the night before it was fixed because a huge storm was supposed to hit. Air currents in the engine bay? Who knows. I'm just glad it went away, and for free! Still gonna check my cap & rotor and regap my plugs, though, just to be on the safe side. No more surprises, please!
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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Lesley
GenIII
10/12/2001
19:08:40
| RE: Hesitation
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Zaurusman, I've experienced that on occasion too - there seems to be no pattern to it, just sometimes when I stomp on the gas it just doesn't respond. I've had recurrent cat problems, so maybe you're not far off with that assumption. Odd, usually when I step on it, it fairly leaps forward, other times, there's nothing left.
How do you re-gap your plugs? I got 3923s yesterday, want to install them this weekend.
Lesley
97 3.9 V6 Sport Club Cab. Black
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Zaurusman
Dodge Dakota
10/13/2001
00:28:00
| RE: Hesitation
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Lesley, I have an aftermarket coil that is putting out more voltage, so I gapped my plugs to .047 or the such. Stock is .040. You can find gapping tools at pretty much any automotive store for next to nothing. It's just a question of how far from the electrode the prong is; manipulate it as necessary to be the correct distance. I'm going to "hammer" mine back to stock with the handle of a screwdriver or the such, since the aftermarket coil didn't do a thing to improve anything on my truck (why I recommend new, better plug wires but nothing else for the ignition).
To swap plugs, you'll need a socket driver that fits a (also necessary) spark plug socket. An elbow is necessary too, as I recall (like a u-joint from your driveshaft between the socket driver/wrench and the socket), but don't use it for the backmost plug on the driver side; it just jams. Do that one w/o it. If you need specific help, just drop me an email; I'm working this Saturday but should be logging on fairly regularly to my personal email. If your plugs are original and installed like mine were, you'll possibly need a hollow pipe to attach to the end of your socket wrench to get enough leverage to break some of them loose. Mine were much tighter from the factory than specifications called for.
Did you get your shop manual yet? Just curious; if you have the stock plug wires, they're labeled as to which goes where (what cylinder). Just remember what order they go in when you take them off.
There has to be a reason why it bogged before and no longer bogs now ... I just don't know it for certain. Doubt I ever will. But, being on my third factory cat, you can bet that the next time I get a rattle down there I'll ignore the warranty and just pay for an aftermarket one! As for response to throttle, I have the same reaction you do; 2 degrees difference and it's a totally different engine. I think the IAT adjuster was helping, but it cooled off right after installing it.
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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Lesley
GenIII
10/13/2001
00:46:27
| RE: Hesitation
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Thanks for all that info! I keep a folder on my desktop labelled "truck" & drop all the really helpful posts into it.
I missed out on the shop manual on ebay by $1! So, I had to order one from the dealership.
I've come to the same conclusion that you have concerning the cat - I'm not messing around with it anymore, I'm going to replace it with a decent one.
I'm researching all the info I can find now on modifying a TB yourself - now that's ambitious! I'll wait & see how it goes... I just bought a lightly used V8 TB from an RT.
Thanks! Lesley
97 3.9 V6 Sport Club Cab. Black
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Zaurusman
Dodge Dakota
10/13/2001
02:20:47
| RE: Hesitation
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Unless I'm mistaken (very possible), if you're looking to port and polish, the V6 tb is the way to go. My recommendation (and bear in mind - I know nothing concrete!) is to install the V8 tb (but you'll need the cable - email me if you want mine) and then upgrade to a better item later, or port & polish your stock one. I believe this requires a dremel tool and necessary attachments. I'll try to remember to check my favorites tomorrow and email you what I find on that subject in case you haven't found the same sites I have. Please email me to tell me what you did, if nothing else!
I keep this good stuff, emailed to my palmtop by me, in an "infobase" of sorts that I can search when necesary. Works great! But then, you know where my handle came from... :-)
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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justin
Dodge Dakota
10/13/2001
10:09:45
| RE: Hesitation
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What the hell i got a 2001 dakota sport 3.9 and mine haesitates to. i accidentaly brought my truck into dodge with my jet chip on and they told me that was the problem. i talked to a few other guys and they said get a blaster coil or a larger battery
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Lesley
GenIII
10/13/2001
10:50:24
| RE: Hesitation
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Hey Zaurusman
Did you upgrade your TB, I noticed you have a Fastman link on your site. I thought about going with one of those, but stumbled across the RT TB while on moparchat. It was such a good deal I couldn't resist, and I had just read a tip from Bernd that upgrading to a stock V8 was a good budget modification. Here's a really good site for tips, particularly porting & polishing:
www.fast4x4.net
I'm pretty sure that I will need to order a V8 cable, I don't think that the V6 one is compatible. It'll probably take a couple of weeks to be delivered (furiously biting fingernails) in the meantime, I think (?) I can buy dremel attachments for my drill, if not, my boss has one...hmmm... he really wants me to work for him while he goes on vacation...:) Also, I just came to the same conclusion that you did - re sparkplug wires, going to take a trip to the parts store today if I can squeeze one last drop from my wallet.
97 3.9 V6 Sport Club Cab. Black
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Zaurusman
Dodge Dakota
10/13/2001
12:13:15
| RE: Hesitation
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I will have a Fastman eventually. Probably six months ago I considered a V8 tb and ordered its cable, then decided to dremel a V6 tb instead, then decided on the Fastman rather than focusing fortune on a whirring stone I'd likely cause massive destruction with.
Zaurusman + Power Tools = BOOM!
The rule of thumb I've seen around here is that a ported & polished V8 tb lets in too much air for a non-supercharged V6. Cool site; thanks!
http://www.dakota-truck.net/UPGRADES/TB01/tb_mods.html
http://www.dakota-truck.net/UPGRADES/TB02/index.html
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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Lesley
GenIII
10/13/2001
14:03:35
| RE: Hesitation
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I just had a dremel tool lesson from a fine fellow at Sears: even though I have a VERY nice drill, it is no match for one of those suckers - 1400 rpm vs 25,000. The *&%@ things are half price all week...(no Lesley, NO Lesley). I'm thinkin' you're right, the bores will be oversized if I mess with it, so maybe I'll play around with my original. Shoot, too bad you live so far away, if I get the dremel you could borrow it!
97 3.9 V6 Sport Club Cab. Black
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Lesley
GenIII
10/13/2001
14:23:48
| RE: Hesitation
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Oh yeah, P.S.:
Thanks for the links, I added that info to my files too. I did a search on this site and found tips from Bernd on both TB swapping & spark plugs. I don't think the added size of the V8 bores would be a problem, it's just that the extra flow wouldn't be utilized. I also found a bernd thread on upgrading your PCM (I DON'T think so - $2600!) Sounds kinda neat, but requires a laptop for programming... think your namesake would be good for that? Also - you live in the same town as Bernd... apparently they are opening a storefront! Wow - his prices are great. I've noticed there are a few Texas guys on moparchat too... and I actually ran into my mechanic on there.... Did you want to sell your V8 cables? Let me know.
Lesley
97 3.9 V6 Sport Club Cab. Black
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Zaurusman
Dodge Dakota
10/13/2001
19:43:18
| RE: Hesitation
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That's a lot of homework you've done in a day! Wanna do my accounting? Naw, it wouldn'be up to the programming task, unless it had alarms set to inform the truck that was time to "go faster!" Bernd's about four hours away with the pedal down, but it does sound like a cool road trip! Another nice thing about if we were nearby? If one of us "slipped" and needed a new throttle body, the other could drive them to the junk yard in style! :-)
See my email re cable, coming soon to a Hotmail account near you.
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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Lesley
GenIII
10/13/2001
23:51:38
| RE: Hesitation
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Yeah, I did the homework... didn't do anything concrete though. 3923s are still in the door pocket awaiting new cable purchase. Tried to squeeze my wallet one more time only to be met with a resounding echoooooo....
97 3.9 V6 Sport Club Cab. Black
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Zaurusman
Dodge Dakota
10/14/2001
00:30:22
| RE: Hesitation
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Don't feel bad; my turnip is resolutely out of blood as well. I squeeze and squeeze ... nothing! Must be broken... :-(
Hmm... that just didn't sound right...
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Zaurusman
'98 RC Red Sport V6 5spd 3.21 15x8's
http://www.tiborsrealm.com/Dakota/Index.htm
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Lesley
GenIII
10/14/2001
10:07:27
| RE: Hesitation
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Talked to a friend of mine last night who is really into his truck (and the finest good ole boy I know)... He said " Héll Les, you don't need one o' them dremels, jus get lots of metal sandpaper & put some dam elbow grease inna it." Uh huh...
97 3.9 V6 Sport Club Cab. Black
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Zed
Dodge Dakota
10/14/2001
23:33:35
| RE: Hesitation
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Message:
The hesitation and/or rough running in the morning is caused by too LEAN of a mixture, not too rich. Emissions requirements require as lean a mixture as possible at all times, even in a cold engine (although its still richer when cold). The lack of an optimum amount of fuel is what makes it run wierd when cold such as a bouncy idle and hesitation. The super-lean mixture(which makes an engine run hotter) also may contribute to the pinging problems these engines seem to have when fully warmed up. Some engines can handle a real lean mixture without problems and some can't. Things such as combustiion chamber shape and valve size may help (or hinder) an engine's ability to handle a lean mixture. Remember that these are older design engines with modern emissions equipment and requirments tacked onto them so that is probably part of the problem. The above is per my mechanic who seems to know everything about everything.. :C) I Also, I paid to have my 99 3.9 hooked up to a computer and he remarked what a lean mixture it ran at when cold so I assume the above is what the problem is. So unfortunatly, i guess it IS normal..... Sigh.....
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wardenfms
Dodge Dakota
JOIN HERE
8/24/2003
18:59:06
| RE: missing
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I have a 98 dakota 4x4 club cab with 98k and get a'miss' out of the blue. The fuel pump and catalytic converter have been replaced and a tune up done. I get no engine lites. HELP!!!
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