Throttle = no acceleration + CEL? - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 08-21-2011, 01:56 PM Thread Starter
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Throttle = no acceleration + CEL?

i bought a 94 powerstroke about a week ago, got home from camping with it today down my bumpy driveway, and immediately lost throttle response, meaning throttle does nothing to increase acceleration but does produce a check engine light. CEL goes away when pedal throttle is released.

Thankfully, i was able to crawl (idle) in 1st up my rocky hill to get the rest of the way home

Any quick fixes someone knows right off the top of their head? ive been dreading the Cam sensor since ive heard a few things about it and have yet to toss a spare in the glove box, but from what i read, these are not the symptoms. Thanks

94 Powerstroke Crew Cab DRW 5sp 4:10 LSD - Mods: 6637, Diamond Eye 4" Turbo back (3" DP) On the way: TS 6 chip (Stock, High Idle, 50, 75, 100, 140HP) 3" IssPro Turbocator Boost/Pyro
74 Bronco - Mods: 5.8 EFI, NP205, AOD/W, Tilt steering, Front disks, PB, PS, LOTS of custom work
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post #2 of 2 Old 08-21-2011, 05:24 PM Thread Starter
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Alright, got it sorted out, i basically unplugged all the stuff down at the throttle pedal and sprayed with some electrical contact cleaner.

Credit:

7.3 Throttle Response Problems - Ford Truck Enthusiasts Forums

Quote:
Originally Posted by ardvarkus View Post
2. Engine defaults to idle from any rpm and throttle no longer responds unless engine is shut off and restarted- Throttle pedal assembly related, almost always due to a conflict in readings of the idle validation switch and throttle position sensor. Ford uses a microswitch as an idle validation switch, it is part of the throttle pedal assembly and dust/dirt/lint/toe jam etc can cause the microswitch to stick intermittantly causing default to idle. Clean the switch with some electrical contact spray or replace as needed, Ford doesnt sell the switch separately and the complete throttle pedal assembly must be purchased.

94 Powerstroke Crew Cab DRW 5sp 4:10 LSD - Mods: 6637, Diamond Eye 4" Turbo back (3" DP) On the way: TS 6 chip (Stock, High Idle, 50, 75, 100, 140HP) 3" IssPro Turbocator Boost/Pyro
74 Bronco - Mods: 5.8 EFI, NP205, AOD/W, Tilt steering, Front disks, PB, PS, LOTS of custom work
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