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jacktoff69
Gen I
 
9/08/2006
19:15:27
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 Subject: no low end power
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Message:
ever since ive had my truck ive had brutal low end id floor it and it just sucks, i have a 3.9l auto with dynomax 2.5in exhaust, custon k&n intake, 180 stat. still no better but high end is aight. there are no codes shown and i cant figure it out i can't even do a brake stand and its a single cab,short box. some help would be appreciated
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Joe M.
Dodge Dakota
JOIN HERE
9/08/2006
21:43:32
|  RE: no low end power
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Message:
bad O2, clogged cat. ?
whats on it for mileage?
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jacktoff69
Gen I
9/09/2006
01:36:29
| RE: no low end power
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Message:
i have a brand new high flow cat, but it may be the o2 sensor ill check that 2morrow... i have just over 100k, ne thing else while i check the sensor
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CluCool
Dodge Dakota
JOIN HERE
9/09/2006
22:07:00
| RE: no low end power
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Message:
Hey jacktoff69 how much did you pay for the cat?
Is it a magnaflow? and where did you get it from?
As far as your question goes I cant help you man sorry.
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?
Dodge Dakota
JOIN HERE
9/09/2006
23:18:49
| RE: no low end power
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Message:
How old is EGR valve /solenoid ?
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03SXT4x4
Dodge Dakota
JOIN HERE
9/09/2006
23:42:38
| RE: no low end power
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Message:
yea i have a 3.9L also. not feel bad..mine cant powerblock for nuthin, unless its rainin. and if i can powerblock it on dry pavement it goes REALLY slow...and its an 03 with 51000 miles on it
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GB2000
GenIII
9/09/2006
23:49:48
| RE: no low end power
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Message:
I could smoke up a Steak n Shake parking lot with little effort back before I had my Bridgestone Dueler's put on...98 3.9L auto w/ bolt-ons.
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Fed
GenII
9/10/2006
03:48:56
|  RE: no low end power
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Message:
THIS IS EXACTLY WHAT YOU NEED TO DO AND YOU WILL BE
A HAPPY CAMPER!
"All of them help once they are all done they
compliment each other
Do them in the correct order doing the exhaust
first befor intake is done will show a low end
loss
crank sensor mod
cold air
bigger throttle body
1.7 rockers
relocate IAT about 6" from body bottom of claner
or in tube
gasket matching intake optional
now exhaust
headers
high flow cat
low restriction muff
now add the MSD 6a multi strike ignition box
a tonno cover and all syn fluids also helps
stock I got 15 to 17
after all the mods 22 24
You must also be sure all your sensors are
working properly a lazy sensor will kill
mileage
good plugs like the NGK
FR4 stock heat range
FR5 1 colder
good cap like the napa mo26 and 28 cap and rotor
solid brass incerts
good wires like the taylor 8mm or MSD 8.5
there ya go start doing them in that order
when you get them all done they run great and
get good mileage
personaly I like the halo plugs but most will
not spend the money E3 are also giving good
resaults
champ autolite $.99 ea walmart
NGK $2.25 each
E3 $5.99 ea
Halo $8.99 ea
92 95 obd1 .035
96 up obd2 .040
stock ignition
with an MSD box .050 to .060
Have Fun
Larry
J&J Auto"
YOU ARE WELCOME!
1993 Dakota CC 3.9 auto
(4.10 gears, LSD, exhaust, intake, lowered 5/5, rear anti-sway bar)
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jacktoff69
GenIII
9/10/2006
22:49:27
| RE: no low end power
IP: Logged
Message:
ok i c what need s 2 done o and i was wondering if a little exhaust manifold leak would be the colperet 2 the low end may b not enough back pressure.
thanks for all of your help so far
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Josh
Dodge Dakota
JOIN HERE
9/11/2006
08:54:11
| RE: no low end power
IP: Logged
Message:
WOW. Some of ya'll went too far. Go onto hughesengines.com and get the cam HER0814AL-V6. You'll need to buy their valve springs, but it was worth it. I have the cam, springs, domed pistons, a .30 over bore, and 4.10 gears. I have no problem pulling the tread off my tires.
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Fed
GenII
9/11/2006
15:05:03
| RE: no low end power
IP: Logged
Message:
hey josh, im gettin my truck back in a couple days with the same cam and similar set up you have...
does your truck sound different than stock?
thanks
1993 Dakota CC 3.9 auto
(4.10 gears, LSD, exhaust, intake, lowered 5/5, rear anti-sway bar)
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jacktoff69
GenIII
9/11/2006
22:55:33
| RE: no low end power
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Message:
so thats a no on the exhaust manifold leak as being the cause 2 the problem
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Josh
Dodge Dakota
JOIN HERE
9/12/2006
03:21:56
| RE: no low end power
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Message:
Fed, the truck does sound different. Anytime you upgrade the cam like I did, you'll get a more race aggressive sound. I'm also running double valve springs, so I get a real heavy chopping sound. When I get on it though, the sound is beautiful. I see you have exhaust and intake mods, so she will sound quite nice.
Jack, there are a few ways to tell if you have an exhaust manifold leak:
1. carbon build up on the block around the manifold.
2. the enigine will sound louder under the hood.
I'd still check it out. If your O2 sensor is bad, the check engine light shoud come on. It didn't on mine. When is the last time you used a fuel system cleaner? Your TB could have a minor clog. Always start with something cheap, if it doesn't work drop in the cam and some 4.10's. You'll be cruisin' in no time.
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jacktoff69
GenIII
9/12/2006
19:25:55
| RE: no low end power
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Message:
ya i know that i have an exhaust manifold leak just wondering if that would create a problem with having back pressure in the exhaust. o and i couldnt get a reading on my back or front o2 sensor with a volt meter. i totaly unpluged the back 1 and it still didnt even show a check engine light. or change any performance wise or is it just the first o2 sensor in the y pipe that effects ne thing.
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Josh
Dodge Dakota
JOIN HERE
9/13/2006
08:19:54
| RE: no low end power
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Message:
Your engine requires certain pressures from the intake and exhaust. If you have a leak at any point it could cause small amounts of lag, but not like what you have. As for the O2 sensors, same thing applies there. You'll loose very little power and your engine will seem like its chugging (almost like bad gas). If you can't get a reading from the multimeter check out one of the Dakota books. I can't remember the name of the books, but you can get them at just about any auto parts store.
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jacktoff69
GenIII
9/14/2006
21:31:30
| RE: no low end power
IP: Logged
Message:
ya i do feel sumtin like that in the higher rpms when i punch it some times it like struggles sort of 2 find the gear, does that sound like a bad o2
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Josh
Dodge Dakota
JOIN HERE
9/14/2006
22:53:40
| RE: no low end power
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Message:
Your truck seems to have a hard time shifting when you get on it? Sounds like your tranny fluid may be low or really old. I'd still get you O2 check out as well. Back to the shifting. Does the truck seem to buck or does it just take a while for it to pick up the lower gear?
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jacktoff69
GenIII
9/14/2006
23:06:15
| RE: no low end power
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Message:
its only maybe 5-6 times in a month or so but then the rest it shifts fine. and i just got a tranny flush, and right after that i noticed better shifting but it was doing this sort of thing before the trany flush. o and i read somewhere that it might of been the tps sensor so i got a new one and it still happens every once in a while
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Josh
Dodge Dakota
JOIN HERE
9/15/2006
03:50:52
| RE: no low end power
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Message:
My next step would be a new tranny, but those can be pricey. Other than that, I'm out of ideas.
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