Stumbling when cold
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Joined: Jun 2005
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Stumbling when cold
I got my ahrd start issue fixed with a new FPR, rebuilt injectors and a new fuel filter. Now the truck jerks and bucks until it runs for a few minutes and heats up. If I put it under load, IE:letting out clutch to move, it jerks until I have to give it gas to keep it from stalling. The shifter bounces all over from the motor shaking. I didn't have this until I did all the work mentioned above! I replaced the TPS, and the ACT sensors. I bought a code scanner and plan to scan tonight.
Another thing, it runs EXTREMELY rich until the problem goes away and then it runs perfect with no rich smell at all in the exhaust. In fact it smells beter than it ever has once it warms up.
I am stumped!
Anyone got any suggestions?
Another thing, it runs EXTREMELY rich until the problem goes away and then it runs perfect with no rich smell at all in the exhaust. In fact it smells beter than it ever has once it warms up.
I am stumped!
Anyone got any suggestions?
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Well I did a code test. With Key on engine off, I got a code 21 and 24
After following all the instructions and i did the Key on engine on, all I got then was a 21.
21= Engine Coolant Temp (ECT) out of Self-test range
24= Air Charge Temp (ACT) out of Self-test range
The ACT sensor is brand new. That code went away once the engine was started and the codes pulled, however the ECT code remains and that sensor I have not replaced yet? Those were the only two codes.
Should I replace the ECT sensor or could it be something else?
Oh yeah, FPR is a week old. That is what fixed my hard start problem.
After following all the instructions and i did the Key on engine on, all I got then was a 21.
21= Engine Coolant Temp (ECT) out of Self-test range
24= Air Charge Temp (ACT) out of Self-test range
The ACT sensor is brand new. That code went away once the engine was started and the codes pulled, however the ECT code remains and that sensor I have not replaced yet? Those were the only two codes.
Should I replace the ECT sensor or could it be something else?
Oh yeah, FPR is a week old. That is what fixed my hard start problem.
Last edited by Jspafford; Mar 21, 2006 at 08:36 PM.
Post Fiend
Joined: Dec 2001
Posts: 10,562
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From: South Jersey
Did you have the truck up to operating temperature when you pulled the codes, if you didn't you would get the ECT code.
If you did have it up to temp I would run the pinpoint tests before replacing anything, drop me an email with the details if you need the tests.
You never know about a new part.
If you did have it up to temp I would run the pinpoint tests before replacing anything, drop me an email with the details if you need the tests.
You never know about a new part.
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Well I started the truck and let it run for about 3 minutes before I run the codes. I don't knowhow long I was supposed to let it run, the book said 2 minutes.
Yeah, please PM with the pinpoint tests. I would like to save $18 if I could.
Yeah, please PM with the pinpoint tests. I would like to save $18 if I could.
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Joined: May 2005
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From: YORK S.C.
i had i similar problem on my 86 bII 2.9,i ened up replacing fuel lnjectors,fpr,iac,map sensor,tps,took care of all the rough idle and running rich..idles's smoothly now mine would buck while accelerating between gears and had no power at all. hope this helps!
Posting Guru
Joined: Sep 2004
Posts: 1,915
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From: Yokosuka, Honshu, Japan
Originally Posted by Jspafford
Well I started the truck and let it run for about 3 minutes before I run the codes. I don't knowhow long I was supposed to let it run, the book said 2 minutes.
Yeah, please PM with the pinpoint tests. I would like to save $18 if I could.
Yeah, please PM with the pinpoint tests. I would like to save $18 if I could.
You may also want to use the procedure in your book to clear all the error codes as well, then do a KOEO and KOER and see what you come up with.
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Well I will let it sit and idle about 10 minutes tomorrow and try again. I can't get it out of the garage to drive it right now. I would have to shuffle a million cars around. I'd say 10 minutes would be good enough to warm it up. I will pull the codes again after I do that.
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