5.3 Extremely low idle
02-06-2010, 11:42 AM
#21
I doubt that the PCV is the problem, especially if it's only a year old. I have seen PCV's stick open, but that was only on vehicles that weren't properly maintained and the valve got full of sludge. If cleaning the IAC helped a little bit, even for a short period of time, I think you're on the right track.
Out of curiousity, how much was the IAC valve Lisa?
Out of curiousity, how much was the IAC valve Lisa?
02-06-2010, 12:33 PM
#22
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I doubt that the PCV is the problem, especially if it's only a year old. I have seen PCV's stick open, but that was only on vehicles that weren't properly maintained and the valve got full of sludge. If cleaning the IAC helped a little bit, even for a short period of time, I think you're on the right track.
Out of curiousity, how much was the IAC valve Lisa?
Out of curiousity, how much was the IAC valve Lisa?
I'm just getting frustrated. I've put a lot of money into my truck, and I'm unfortunately very proud of it....
02-06-2010, 12:43 PM
#23
Lisa I know you said you've got the Haynes Bible, but just a little extra info:
Cleaning:
1) Do Not push or pull on the IAC valve pintle on IAC valves that have been in service. The force required to move the pintle may damage the threads on the worm drive.
2) Do Not soak the IAC valve in any liquid cleaner or solvent, as damage may result.
Installation:
1) Measure the distance between the tip of the IAC valve pintle and the mounting surface (1). If the distance is more than 28 mm (1.1 in) use finger pressure to slowly retract the pintle. The force required to retract the pintle of a new valve does not cause damage to the valve.
2) Lubricate the IAC valve O-ring with clean engine oil.
3) Install the IAC valve O-ring on the IAC valve.
4) Install the IAC valve.
5) Apply LOCTITE 262 to the IAC valve attaching screw threads if necessary.
6) Install the IAC valve screws. Tighten the screws to 3 N•m (27 lb in).
7) Plug in the IAC valve
Note: do not plug in the IAC valve and turn the key on before finishing the installation of the new valve.
Cleaning:
1) Do Not push or pull on the IAC valve pintle on IAC valves that have been in service. The force required to move the pintle may damage the threads on the worm drive.
2) Do Not soak the IAC valve in any liquid cleaner or solvent, as damage may result.
Installation:
1) Measure the distance between the tip of the IAC valve pintle and the mounting surface (1). If the distance is more than 28 mm (1.1 in) use finger pressure to slowly retract the pintle. The force required to retract the pintle of a new valve does not cause damage to the valve.
2) Lubricate the IAC valve O-ring with clean engine oil.
3) Install the IAC valve O-ring on the IAC valve.
4) Install the IAC valve.
5) Apply LOCTITE 262 to the IAC valve attaching screw threads if necessary.
6) Install the IAC valve screws. Tighten the screws to 3 N•m (27 lb in).
7) Plug in the IAC valve
Note: do not plug in the IAC valve and turn the key on before finishing the installation of the new valve.
02-06-2010, 12:48 PM
#24
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Bear...
I had followed all of the instructions up to putting Loctite and measuring the pounds of pressure....
I will just have to see when the new valve gets here. Thanks.
I had followed all of the instructions up to putting Loctite and measuring the pounds of pressure....
I will just have to see when the new valve gets here. Thanks.
02-08-2010, 08:36 PM
#28
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Ok, Billy we replaced both the IAC and the TPS. Now we wait till the morning.
Why the TPS, jic. I was reading the Haynes Bible and there was something in there that stuck out to me...
"A broken or loose TPS can cause intermittent bursts of fuel from the injectors and an unstable idle because the PCM thinks the throttle is moving."
What doesn't make any sense is the TPS literally looked new.
Why the TPS, jic. I was reading the Haynes Bible and there was something in there that stuck out to me...
"A broken or loose TPS can cause intermittent bursts of fuel from the injectors and an unstable idle because the PCM thinks the throttle is moving."
What doesn't make any sense is the TPS literally looked new.
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