Join Date: Jul 2011
Location: Birmingham, Al
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Noob with question on throttle pedal response
1st time OBS owner here, just picked up my truck this week and slowly getting a few bugs worked out of it, hope you guys don't flame me too bad, I tried searching this a few times without much luck on an answer.
If I hook my Snap-On scanner to the truck with the engine running, slowly apply ~10% throttle, the throttle pedal voltage rises up to a little over 1 volt before the duty cycle on the injectors responds...basically the truck has a pretty bad dead spot to the throttle. Being a manual it is really noticable, and I am sure there could be several things contributing to the issue...so here is the short list of things I have done so far
Baldwin fuel filter
Checked and corrected fuel pressure (the regulator was stuck, giving me only 15-20 psi, now I have 45-50 at idle and almost 70-75 @ 2500 rpm)
Cleaned the electrical connector at the throttle pedal
Like I mentioned, the voltage does increase with the throttle...just the engine does respond until I get close to 1.2V. The best I recall it idles around .58V
The truck has a stock ECU (no chip or tune) and is an original part...the IDM is not original, cannot see any sticker or ID tags on it, but it is all black. Back in the day NAPA's line of replacement ECU's were black (Echlin brand??).
I am going to pull the IDM and see if I can identify it.
Any other thoughts or information you guys may need to know?
Thank you in advance!!
1997 CCLB 4x4 ZF, 295-75-16 BFG A/T's, 16x8 ARE Outlaw II's, DP & 4" exhaust, 4" Skyjacker Suspension kit, FPR shim, DIY intake, Autometer boost and pyro, PHP Hydra Chip, DIY 140V IDM and E-Fuel are next!
Last edited by Reed P; 03-01-2013 at 05:13 PM.