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Dale
Dodge Dakota
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6/04/2003
10:44:26
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 Subject: Rough Idle at Start Up
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Message:
Hello all, I haven't posted here in a while. You guys helped me do all my mods last summer, and haven't had any major problems with truck tell lately.
When I first start the truck up in the morning, it will idle rough for about 20-30 sec, then pick up idle, and idle smoothly.
In afternoon after work, it does it some, but not as long and as bad.
I have cleaned, and swapped IAC, taken whole TB off, cleaned also.
Plugs changed this past winter.
Cap N Rotor changed early this year (full brass).
Wires changed last fall.
Mods on truck.....
48mm Tb with removed horns
Dynomax 17748
S Hook tb hold down.
Asp Crank Pully
Modified Air intake
Reloacted IAC to intake
180 T-stat
Any Ideas what I'm overlooking please??
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JEFF306
Dodge Dakota
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6/04/2003
12:36:17
|  RE: Rough Idle at Start Up
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Message:
MINE DOES IT TO, BUT I THINK I FIXED IT YESTERDAY. I FOUND I HAD AN INJECTOR O-RING LEAKING AND ALSO AN OXYGEN SENSOR CODE. I REPLACED BOTH AND IT RUNS WAY BETTER AND STARTS UP SMOOTH. HOPE THIS HELPS
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Dale
Dodge Dakota
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6/04/2003
15:26:27
| RE: Rough Idle at Start Up
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Message:
Damn, I hope its not injectors. Them things arnt cheap at all.
No codes in the ecm as far as the "key trick" method.
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jeff306
Dodge Dakota
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6/04/2003
17:06:21
| RE: Rough Idle at Start Up
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something might be dripping into the cylinder when it's not running. could be oil or fuel. then you start it and it lopes for a second until it cleans out, then your ok.
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Dale
Dodge Dakota
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6/05/2003
09:29:15
| RE: Rough Idle at Start Up
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I guess its time to check my injectors. The beast has about 112k on it.
Ignition sounds good to you? I dont have any knocks or ticks, so I'm guessing everything is fine internal. Gotta be a external sensor/part.
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bdholsin
Dodge Dakota
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6/05/2003
09:54:46
| RE: Rough Idle at Start Up
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If it is a bad injector I may have an extra one from my '97 3.9L Dakota. The o-ring is a little chewed up (that is why I replaced it) and at the time I couldn't find a replacement o-ring. I think I can get a new o-ring put on it. If you are interested I'll give you a deal on it. New injectors run around $90 if I remember correctly.
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Dale
Dodge Dakota
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6/05/2003
11:31:01
| RE: Rough Idle at Start Up
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I remember when I was here last year, people putting in mustang 19lbs, so I'm searching for them. I'm also going to do a blead down test first.
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bdholsin
Dodge Dakota
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6/05/2003
12:13:55
| RE: Rough Idle at Start Up
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Dale - If everything comes unwrapped then you can e-mail me at bholsinger@twmi.rr.com and I'll go through my basement to find the old injector.
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Dale
Dodge Dakota
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6/05/2003
15:52:41
| RE: Rough Idle at Start Up
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Message:
Thanks, will keep that in mind.
Will it still "tick/vibrate" if its bad?? I felt all of them while its running, and all vibrate.
I think I'm going to pull the fpg out of the toolchest and see if it bleads down over night.
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Dale
Dodge Dakota
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6/07/2003
00:04:42
| RE: Rough Idle at Start Up
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Did I leak down test on them tonight. Installed guage at 8pm, had 45psi, at 10:30pm,I had 22 psi. I belive have some leaky injectors. Anyway to test to find out which one(s) are bad??
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jeff306
Dodge Dakota
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6/07/2003
12:32:35
| RE: Rough Idle at Start Up
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Message:
that amount of pressure drop in two hours is fine. when there is a problem, you will see the needle drop lets say from 45 to 22 within one or two minutes. then you know you have either a leaky injector,regulator,line,filter or check valve in the pump. if you want to visually check the ijectors then, unbolt the fuel rail with the injectors in it and put a piece of paper under each nozzle, then pressurize the system and look for drips.
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Dale
Dodge Dakota
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6/08/2003
10:26:54
| RE: Rough Idle at Start Up
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Ok, pulled the rail and looked, nozzles stayed dry. The middle on the pass side was a little wet/damp on the outside, so I got some o-rings to replace them.
I doubt thats my problem. What would be next on my list?
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