Bacondoggy
Registered User
I have been away in the 82nd airborne so I have not had time to fix my car. but these are the symptoms:
first of all it is a 91 sc 75k about 4-5k on the engine - all new parts. maf is good, new IAC.
you start the car it seems fine after about 5 seconds (most of the time) it seems like the computer runs a test and pushes the rpm's up to 2100 and it stays there... about 20 seconds it calms down and goes to about 900. now to main problems. #1, when driving, if you put the car in neutral, it idles around 2000 rpm, until you come to a light or stop then in about 5 seconds it will slowly go back to normal idle. #2 when you step on the gasand its below 2000 rpm (in any gear - even 5th going like 45), the car stutters and dies. as you step on the gas the rpm's will go down and you get NO power at all. the only way I can drive it is to downshift and rev the engine alittle to get it to go. once around 2000-2200 rpm the car will kick you back in your seat and seem to work fine. at WOT it seems fine after the madness. I am sure if it is doing all this, there is HP being sacrificed even at WOT. Me and a buddy tested it a while back and it came up with a code saying both banks reading lean. the O2 sensors - one is brand new and the other one is fairly new if I can recall right. I am very frusterated because I have no idea what is causing this. the fuel pressure is normal, and the fuel injectors SEEM to be intact. One was brand new (the ceramic end was chipped off very slightlly when I took them out on the rebuild so I replaced it.). any ideas would be GREAT!
thanks guys..
Mark
first of all it is a 91 sc 75k about 4-5k on the engine - all new parts. maf is good, new IAC.
you start the car it seems fine after about 5 seconds (most of the time) it seems like the computer runs a test and pushes the rpm's up to 2100 and it stays there... about 20 seconds it calms down and goes to about 900. now to main problems. #1, when driving, if you put the car in neutral, it idles around 2000 rpm, until you come to a light or stop then in about 5 seconds it will slowly go back to normal idle. #2 when you step on the gasand its below 2000 rpm (in any gear - even 5th going like 45), the car stutters and dies. as you step on the gas the rpm's will go down and you get NO power at all. the only way I can drive it is to downshift and rev the engine alittle to get it to go. once around 2000-2200 rpm the car will kick you back in your seat and seem to work fine. at WOT it seems fine after the madness. I am sure if it is doing all this, there is HP being sacrificed even at WOT. Me and a buddy tested it a while back and it came up with a code saying both banks reading lean. the O2 sensors - one is brand new and the other one is fairly new if I can recall right. I am very frusterated because I have no idea what is causing this. the fuel pressure is normal, and the fuel injectors SEEM to be intact. One was brand new (the ceramic end was chipped off very slightlly when I took them out on the rebuild so I replaced it.). any ideas would be GREAT!
thanks guys..
Mark