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gp1300r
Dodge Dakota
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1/24/2010
21:28:04
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 Subject: NEED 4.7 HELP!!
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Need some HELP. I have a 2001 Dodge Dakota QC 4X4 4.7, 185,000 miles. It was running fine. For the last 3 yrs the engine light has been on with a 601 code (bad PCM). But it has been running fine with the 601 code. So I went to change the spark plug as I always do, change them one by one. After I was done, went to start the truck and it was running ruff & idling ruff. Like a cylinder was not firing or something. So I cleaned the TB replaced the TPS & IAC & O2 sensor still nothing. So I turn the truck on, pulled the #1 spark plug wire (did nothing) then #3, then #5, then #7 (one by one). Then I had unplugged the #1,3,5,7 all at the same time and the truck stayed on like I did nothing. If I pulled any of the other spark plug wires (one by one 2,4,6,8,) you could tell the difference with just one unplugged. So I pulled the plugs and the 1,3,5,7 one looked like weren’t firing at all.
Is there anything other than the PCM that would cut off ½ of the engine? Thanks for any help.
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gp1300r
Dodge Dakota
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1/27/2010
23:36:47
|  RE: NEED 4.7 HELP!!
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anyone..anyone
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02dak4x4
Dodge Dakota
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1/30/2010
14:47:48
| RE: NEED 4.7 HELP!!
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Nothing that I am aware of would cause a whole bank to shut down. The computer controls spark on the 4.7. It also controls the fuel delivery. Are those cylinders getting fuel? I would double check that you didn't hit a ground wire or something that would cause either the coils on that side or the injectors to lose their ground. Other then that, I am out of bright ideas.
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gp1300r
Dodge Dakota
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1/30/2010
15:39:50
| RE: NEED 4.7 HELP!!
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thanks for your time 02dak4x4 , you think the timing chain jumped a tooth? where should i look for the grounds on the injectors & coils?
thanks again
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daddio
Dodge Dakota
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1/30/2010
19:48:25
| RE: NEED 4.7 HELP!!
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Since when does a 4.7 have spark plug wires?
Give the wires to the coils on that bank a good once over. I'm not sure about the wiring on the 4.7 but one bank may have a common for all the coils on that bank.
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gp1300r
Dodge Dakota
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1/30/2010
20:10:13
| RE: NEED 4.7 HELP!!
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Hay daddio, what I mean by plug wires
is the plug to the coil. If one is bad do
they all go bad . I wouldn't think so.. But what
do I know. They can only plug in where they
can off, can't realy mix them up.
Thanks for any input!!
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02dak4x4
Dodge Dakota
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1/31/2010
22:26:47
| RE: NEED 4.7 HELP!!
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I would follow the wiring harness back and look for a ground. Otherwise I am not sure. without looking at it I can't tell. But I would expect something like that to be your problem, if the pcm failed I would expect no fire in any cylinder.
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dirtydodge
Dodge Dakota
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1/31/2010
22:57:49
|  RE: NEED 4.7 HELP!!
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my 47 did that and it was thetiming chain on thedriver side tensoner broke and jump timing bad
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hcw
Dodge Dakota
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2/04/2010
15:48:31
| RE: NEED 4.7 HELP!!
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Where do you live? The drones at State Inspection here will not give you a pass if the light is on, so you can't renew your registration.
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