Hello guys. Trying to locate the issue with my car. Car is an 86gt with a 2.8 auto. The car will rev freely both at idle and under load. At idle there is a "moment" where something causes the idle to drop and run a little rough. This is worse under load. I have a video of the tach as it is doing this while in drive and holding the brake. http://youtu.be/-6Nfb7y7zko
Second video is while in drive holding the brake, http://youtu.be/q3zh0toucYs
Sometimes the car will right itself, others it may stall out completely. While driving, there is a steady miss, and during take off it bogs down but will take off and get you there if you give it the gas. I have checked:
Fuel pressure, key on engine off 41lbs. running 38 with 1 or 2 psi change while reving. in drive, pressure stays the same. Will drop to 20lbs or so after about 20 minutes of being off.
Parts that are new.
AC delco ICM and pickup coil
Distributor is a cardone remaned that was in when i bought it.
coil to icm wire
AC delco O2 sensor
plugs and wires
AC delco Map sensor
coolant temp sensor.
I have also added 2 ground straps to the car.
Timing has been an issue. Based on the timing marks, if the distance is the same between each degree, Mine will not run at anything under 12 and even then it will stall pretty soon. Guessing, i would say about 15 is about where it is set. Anything else and it seems that it wont run at all. either wont start, or stall immediately. This is with the ALDL grounded.
I have checked for vacuum leaks without finding any, as well as tightened all manifold bolts.
I have had the car for almost 2 months and have put about 200 miles on the car to this point. Really want to enjoy having a fiero again, but the car says no, lol.
Can anyone please point me in the right direction?
[This message has been edited by fiero_gt (edited 09-07-2014).]