Hope some of you can give me some help with a problem I am having. My baby is sick she is a 94 Z28 runs good for 10 min (till warmed up) then progressivly looses power til she wont idle. I dont see any blubbles in the water no oil in the water and no water in the oil. any ideas? The loss of power is over 5 to 10 min.

 

sounds like something changing with the change from open loop to closed loop

check your O2 sensors, leaky waterpump (onto opti), and vacuum lines

 

My gut says O2 how do I check it? Have had a couple shadetrees tell me replace the PCM but I havent heard of PCM problems so I was leaning away from that.

 

May be the ICM, behind the coil.

 

you can check your O2's by disconnecting them, this will make your car stay in open loop I think.. your car will then run off pre-programmed tables from your pcm if car runs fine for more than 5-10 min. like you said then you have found your problem.

 

what he said^

 

LOL Sometimes its the simple things that you dont think of. I'll try that ... the car is at a friends where we are working so I cant get at it till Monday but thanx ... also if anyone else has sugestions of what and how to check things please please please post them I am open to all ideas.

Thanx
Stan
94 Z28 LT1 T56 lead foot and brain to match

 

Well I think I have tracked down the problem. Seams my daughter put E 85 in the tank ... from what I can assertain looks like O2 sensers ar fubar. getting new ones and drainin the tank. Anyone know if there are sensors that can be used with e85?

Stan

 

i think you have to worry about more than o2s to run e85 regularly if thats what your asking

 

was more just not wanting to drain the tank ... full tank what to do with the gas ???

 

really big bondfire?

 

Buy a couple big plastic gas cans. Never know, they might come in handy in the future as well.