After a few miles of driving, especially on the highway at around 80mph and 3.5krpm, the engine starts to shut down. But if i pull over and turn it off and back on it runs fine, until it possibly does it again. Or even if i remain on the highway, switch the keys off keep it in gear and turn it back on it will run fine. Whats wrong? It doesn't happy often, especially if i just go easy on it, maybe 80pmh and 3krpm. I notice the check engine light is on, but it will go off as soon as i hit the gas, and come back on soon as i let off.

 

Pull the codes from the ECU and start from there. It sounds like you may be hitting limp mode (I am assuming S5 since you didn't tell us what year your car is).

 

Oops, sorry, yea its an 89 vert...is this problem common and easily fixed? and i dont know how to pull the ecu codes.

 

+2 check codes and see what it is.

http://fc3spro.com/TECH/HOWTO/ERRORC...KI/kerror.html

^^ Check the site out, it tells you how to check it.

 

dont know if i read this right but it looks like,

check engine lights Comes on Pauses for a sec, flashes on twice then pauses for a sec, then flashes twice at half a second, and then from there it flashes quickly another 7 times, sorry if i made this confusing

 

If those flashes are long...2 in the tens column
Probably a 0 in the ones column
And if those are long...2 in the tens column
7 in the ones column

If after that, everything keeps repeating, then you probably have 2 error codes going on.

# 20 - Metering Oil Pump (MOP) position sensor - Basic Fuel Inj and fixed timing
# 27 - MOP (General) - Basic Fuel Injection and fixed timing

Which would be a strong candidate for limp mode.

 

well dude, there you have it. dont drive around with that busted OMP.

 

Yea, thats what my mechanic said it might be after i explained the problem, just thought i'd get a second opinion from you guys, thanx for all yer help.

 

I have an S5 OMP with attached lines and wiring up in Cumming, GA that you can get for $50 if you need to fix yours