OK.
My stock 91 vert (NA) must be jealous of all the time I am spending on the 3rd gen this weekend. When I drove her home Friday night she acted like an F1 Ferrari instead of a 14 year old car. Everything was perfect. I parked her in the usual spot. This morning (Sunday)I needed to get some stuff for the 94 3rd gen.

The 91 started fine but 1 mile down the road, the check engine light comes on and stays on (it had flickered many times since I owned her but never set a code). No the thing has no power past 15-20% throttle. Cruises fine at 45 mph but no acceleration or power.

Got her home and set up the code reader and got the following codes:

12 (TPS)

13(MAP)

17 (Feedback system)

20 (MOP sensor)

26 (I know, there is no code 26, except the 91 shows this as a problem, I rechecked it 3 times)

27 (MOP)

73 (Rear Secondary Inj)


Are these all bad or just showing bad because the engine is in "limp" mode. Any idea how all of these go to **** at once Or does someone know of a cascade effect of failures?


HELP!!!

 

nah when i was in limp mode i only pulled the omp sensor and the o2 sensor .

 

It's most likely the "cascade" effect you're refering to. Start with the TPS, if it's good by the book, go to the next item, and so on...

 

you know what though. if the car is running like crap and all your feedback senors are messup . there might be a reason.. what happens is when the omp sensor on the s5 goes it fries the ecu. that might explain why pretty much every sensor is tripped . just another shot in the dark but i thought that i would throw that out there. but do the smallest thing first . if it solves the problem then you know im wrong

 

IIRC the only thing that will throw a complete limp mode is the omp?

 

Thanks to everyone for the advice, I will follow through and let you all know. Problems continue. BTW the car is an autoshifter



If the ecu were fried, wouldn' t the car simply not run at all?

 

not sure. i got lucky when mine went. i cahnged the sensor and the omp and everything was fine

 

which sensor?