96RedRunner
Senior Member
Lotta things on 4th Gen harder to get at, 3rd Gen not bad.
Bad Idle & Stalling
- Thread starter gamefreakgc
- Start date
Lotta things on 4th Gen harder to get at, 3rd Gen not bad.
T4topher
Member
This is exactly what I had pretty much and as far as I can tell on my little test drive yesterday it seemed like it was gone. Just replaced the tps.
96RedRunner
Senior Member
Mine doesn't act up every time I drive it or very often.
T4topher
Member
Neither did mine, it was only every once and a while.
gamefreakgc
Elite Member
Fixing the hoses and adding the fuel stabilizers helped but still idling low. 550 or lower sometimes when coming to a stop (feels like it's about to stall) and 675 in park. New TPS is still on order.
gamefreakgc
Elite Member
New TPS is in and runs even better, pretty much back to normal. I think in time the idle speed will level out even more.
So to recap, the #1 offender was indeed the TPS however it wasn't the sole cause. I confirmed it was failing slowly with the resistance test but I noticed in one of my dyno logs a few months ago the throttle position on my AEC said the throttle was at 103%. This should have been a red flag since it can't open more than 100%. I calibrated it about 3 years ago so since then the TPS voltage has degraded over time.
Replacing the IAC valve also helped the idle speed though it still threatened to stall a few times, though not as bad as before.
For extra measure, I did adjust the throttle stop screw. It's behind the spring on the bottom on the front facing side of the throttle body. I did one complete turn. For reference, there was 7 threads showing on the paint side so I turned it once to 6 threads.
EDIT: So don't mess with the throttle stop screw LOL. Idled at like 2000 RPMs! I put it back to where it was before and it's better now.
So to recap, the #1 offender was indeed the TPS however it wasn't the sole cause. I confirmed it was failing slowly with the resistance test but I noticed in one of my dyno logs a few months ago the throttle position on my AEC said the throttle was at 103%. This should have been a red flag since it can't open more than 100%. I calibrated it about 3 years ago so since then the TPS voltage has degraded over time.
Replacing the IAC valve also helped the idle speed though it still threatened to stall a few times, though not as bad as before.
For extra measure, I did adjust the throttle stop screw. It's behind the spring on the bottom on the front facing side of the throttle body. I did one complete turn. For reference, there was 7 threads showing on the paint side so I turned it once to 6 threads.
EDIT: So don't mess with the throttle stop screw LOL. Idled at like 2000 RPMs! I put it back to where it was before and it's better now.
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