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talsbury
GenIII
 
11/02/2002
16:32:37
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 Subject: 4.7L No idle and valve tap
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Message:
Well I think I did my motor in today. A little trip to the local mud hole on base provided a nice thick coat of mud to play in however I got a little stuck and refused to let my Dakota get pulled out. Now she wont idle at all cant shift out in to overdrive and there's a horible valve tap. Whoa.. she runs rough. However I made it out and made it home But now I Find out the damage any suggestions. Check engine light goes nuts also it flashes at me constantly?
2001 CC 4.7L 4X4 one day it will be an HO
"Yep i'm gonna call it an HO just for the arguments"
Homebrew Airaid Intake, SpinTech muffler, HO cams and other toys in the box
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FastRT6dakota
Dodge Dakota
JOIN HERE
11/02/2002
18:34:47
| RE: 4.7L No idle and valve tap
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Message:
Hey, just thought I'd throw in my $.02. I work for a brand X company (not DCX) cough cough Ford. Anyways, my job is to check out the diagnostic systems for the emissions and powertrain controls. So basically your blinking MIL light, if DCX follows the federal guidelines means that you have a severe, possibly damaging misfire-type issue. You mentioned that it won't idle and runs rough. If you try to bring the RPM up to above 2000 RPM, does it seem to smooth out at all? If you're not sure, I wouldn't try it. As far as the noise, it probably isn't valve tap. It is more likely to be detonation (pre-ignition/ spark knock). This can cause major damage, like blowing head gaskets, burning holes in pistons, breaking ring lands, etc. My advice would be to have it towed to the dealer. Tell them that you drove through a deep puddle and you think it might have sucked water into the engine. That will give the dealer a place to start. If I had to bet though, they will probably hook it to a diagnostic machine, try to determine which cylinder is misfiring, check for spark and fuel to that cylinder, and replace either the injector or the coil. Just my ideas, you HAVE to let me know, just for my own curiosity. Good luck.
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talsbury
GenIII
11/02/2002
19:17:34
|  RE: 4.7L No idle and valve tap
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Message:
Hey thanks for your $.02. I will have it towed to my service dealer first thing Monday. I was a little curious about that flashing MIL light i have never seen that. I will keep it updated when I find out more Monday.
2001 CC 4.7L 4X4 one day it will be an HO
"Yep i'm gonna call it an HO just for the arguments"
Homebrew Airaid Intake, SpinTech muffler, HO cams and other toys in the box
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Dan Gruber
GenIII
11/02/2002
19:26:55
| RE: 4.7L No idle and valve tap
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Message:
Following up on what Fast RT6 said: before going to the dealer, CLEAN EVERY TRACE OF MUD OFF YOUR TRUCK, including under the hood. Also, make sure all your electrical connections are clean and totally dry. Take a close look at your air filter and the inside of your air intake tube. If it all looks clean and dry, you probably didn't suck any water into the engine. And don't forget to check the PCV connection on your air intake to make sure it is clean and dry.
I'd start with the PCM or TCM. PCM is on passenger side behind the air filter box, and the TCM is located just behind the passenger side headlight...you might have gotten some dirt, mud, or water into the connectors, which might explain the OD not working and lousy running. Or you may have fried something (mechanically or electronically) when trying to get unstuck...I'm guessing you spent some time spinning wheels (or at least trying to) and maybe some rocking back and forth?
Valve tap...hmmm, maybe, but unlikely if you didn't suck water into your engine. Won't idle and runs rough...again, I'd look for water in any electical connections. I cleaned the underhood area of a saturn one time and got a tiny bit of moisture under a spark plug rubber cover. Car ran LOUSY, and I had to spend a fair amount of time cleaning & drying the cover and connector. Took several tries spread over several hours to get it totally dry and running right.
Good luck.
Dan
2000 CC SLT 4.7 4X4 Auto 3.92 LSD
3 inch Performance Accesories lift & 32 inch BFG MT KM's
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QQQ
Dodge Dakota
JOIN HERE
11/03/2002
00:10:07
| RE: 4.7L No idle and valve tap
IP: Logged
Message:
Flashing MIL light is a signal to shut off the truck. Not supposed to run it or disaster, according to the manual.
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Cotharyus
GenIII
11/03/2002
09:03:41
| RE: 4.7L No idle and valve tap
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Message:
Yea - and I'd say if that pic you've got up is any indication, you've probably got water in there somewhere - my bother hit something like that in a mazda he was driving and it sucked up so much water it just straight up chucked a rod out the side of the whole works. I don't mind 'wheelin and mudding, but I am very carefull around deep water about how fast I'm going.
2001 QC 4x4, 4.7,5 spd, LSD, 255/70-15's, K&N Gen II Intake, Robert Shaw 180 Stat, Hanson Enterprise custom front bumper, Highflow cat
Check out my Dak
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prognosis bad
Dodge Dakota
JOIN HERE
11/03/2002
10:18:32
|  RE: 4.7L No idle and valve tap
IP: Logged
Message:
Water don't compress= hydrostatic lock= $$$= :-(
Aftermarket intake? Take it off quick or dealer will eat you alive.
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talsbury
GenIII
11/03/2002
10:38:36
| RE: 4.7L No idle and valve tap
IP: Logged
Message:
Well thank you for all the information I am going to spend most of the day under the hood with electrical parts cleaner and a sponge.
2001 CC 4.7L 4X4 one day it will be an HO
"Yep i'm gonna call it an HO just for the arguments"
Homebrew Airaid Intake, SpinTech muffler, HO cams and other toys in the box
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FastRT6Dakota
Dodge Dakota
JOIN HERE
11/03/2002
17:21:56
|  RE: 4.7L No idle and valve tap
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Message:
Hey Talsbury, heres a chance for you to help out a fellow 4.7L H.O. wanna-have. How hard was it to install the cam set into your engine? I am looking to pick up the cams and intake from buymopar.com and also the install tools. I was just wondering what kind of pain it is to get to the cams and also how long it took. If you still have a copy of the instructions and could some how email them to me, I would greatly appreciate it. My email is FastRT6Dakota@aol.com. Thank you.
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talsbury
GenIII
11/04/2002
02:16:34
| RE: 4.7L No idle and valve tap
IP: Logged
Message:
I still havnt done the instal myself on the cam's. I have only seen them done at a dodge dealer. I have done the intake manifold and the throtle body myself and those two are very easy. I sent you the instructions i got form speedtweaks. Let me know if the instructions dont make it to you. Ill resend them.
2001 CC 4.7L 4X4 one day it will be an HO
"Yep i'm gonna call it an HO just for the arguments"
Homebrew Airaid Intake, SpinTech muffler, HO cams and other toys in the box
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kgerrick
Dodge Dakota
JOIN HERE
12/21/2004
08:37:32
| quadcab check engine light
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Message:
what is the most likely culprit for a steady
check engine light on a 2002 dodge dakota quadcab.
it will be on for days at time then off. seems
to have no punch at lower rpm. also requires more
rpm to get the truck rolling.
thanks
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JasonB
Dodge Dakota
JOIN HERE
12/21/2004
08:50:47
| RE: 4.7L No idle and valve tap
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Message:
kgerrick
Cycle the ignition key from the "OFF" position to the "RUN" position 3 times and stop in the "RUN" position. Watch the odometer and note the codes that it displays. Then post them here for us.
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Ray H
Dodge Dakota
JOIN HERE
1/05/2005
17:21:29
|  RE: 4.7L No idle and valve tap
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Message:
I have one that is running great and the light just stays on I took the battrey cable hooping to reset the computer and that would be it but it is not but the truck runs fine got only 19,000 on a 1995 anyone have a idea
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Rob C
Dodge Dakota
JOIN HERE
1/06/2005
10:36:58
| RE: 4.7L No idle and valve tap
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Message:
Ray H, have you checked the vitals? Oil pressure & level, look for unplugged connectors, what's the history of this vehicle? You only have 19K miles on a 1995 vehicle? That's less than 1,800 miles/year, when do you ever drive it? How much of the parts are factory original? Battery, plugs, cap, rotor, wires, O2 sensor? You can go to Autozone and have them scan your truck for codes. You have a pre-'96 so your truck has the older OBD I system most likely. Good luck.
kgerrick, you need to listen to JasonB and check for codes. If your MIL is lit, your truck seems weak because it's in "limp home mode" you need to find the problem before it becomes serious.
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Elotemuygrand
Dodge Dakota
JOIN HERE
1/06/2005
20:41:28
| RE: 4.7L No idle and valve tap
IP: Logged
Message:
Last time I heard what everyone agreed was a valve knock on our dak, it was actually a clogged fuel injector.
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