Guys, I've got a problem I'm trying to track down.
Chronology:
- get new tank of gas
- next day, drives to work fine
- head to lunch and intermittent check engine light, then stumble and stall, when coming to a stop
- must use throttle to start her up, but drives fine to restaurant
- leaving restaurant, drive, and same thing happens at next intersection
- start her up, and drives fine all the way back home with multiple starts/stops EXCEPT for one period of bucking/surging
So at this point I think fuel or TPS related and I change the fuel filter as a precaution. Pull ECM fuses for a while to let everything reset.
- next startup it stalls and throws a code 51 - check ECM/PROM installation
- start it up again and runs just fine, take it for a test drive, no problems
- get in truck this morning, very hard to start
- once started, idle is spiking quickly (not hunting) back and forth between just over 1000 and stall conditions
- Borrow a friend's Diacom setup and TPS voltage reads fine, TPS behaves fine. More code 51s.
- sit on the throttle a while and after engine warmed up, idles perfectly...no problems
So next spare time I have, I'll pull out the ECM and check connectors and such. Reseat the PROM.
Anything else you guys think I should check?
Thx!
Chronology:
- get new tank of gas
- next day, drives to work fine
- head to lunch and intermittent check engine light, then stumble and stall, when coming to a stop
- must use throttle to start her up, but drives fine to restaurant
- leaving restaurant, drive, and same thing happens at next intersection
- start her up, and drives fine all the way back home with multiple starts/stops EXCEPT for one period of bucking/surging
So at this point I think fuel or TPS related and I change the fuel filter as a precaution. Pull ECM fuses for a while to let everything reset.
- next startup it stalls and throws a code 51 - check ECM/PROM installation
- start it up again and runs just fine, take it for a test drive, no problems
- get in truck this morning, very hard to start
- once started, idle is spiking quickly (not hunting) back and forth between just over 1000 and stall conditions
- Borrow a friend's Diacom setup and TPS voltage reads fine, TPS behaves fine. More code 51s.
- sit on the throttle a while and after engine warmed up, idles perfectly...no problems
So next spare time I have, I'll pull out the ECM and check connectors and such. Reseat the PROM.
Anything else you guys think I should check?
Thx!
The last few years I've just found myself turn into a lurker, and then recently got into sportbikes so that's my obsession these days