Engine runs bad
Thread Starter
Intermediate
Joined: Mar 2006
Posts: 30
Likes: 0
From: Hopewell Junction N.Y.
Engine runs bad
I replaced my Multec fi's (1990 L98 87,000mi.) with rebuilds from MotorMan. Cleaned plenum,TB, EGR. When I started the car it seemed to be starving for fuel. I had to race the engine to keep it from stalling. It didn't seem to miss but it did backfire. What can I do to fix it. Thanks in advance. Walt
Le Mans Master
Joined: Jul 2007
Posts: 5,356
Likes: 2
From: No HOA, New Hampshire
Cruise-In X Veteran
St. Jude Donor '09
I would put the old injectors back in. Rebuilt does not mean new. Did you mark or tag all injector wires before you removed them? Cross them up and it will never run right.
Thread Starter
Intermediate
Joined: Mar 2006
Posts: 30
Likes: 0
From: Hopewell Junction N.Y.
Crossing FI Wires
From what I was told, where electric lines go is unimportant. I did put them back the way they come out of the harness. I did a code check and I get three dashes for both #1 and #4. So I have no errors. Just for fun I pulled the ECM fuse but that made no difference. It seems to starve for fuel, but I won't have a pressure gage until tommorow. Any more help will be appreciated. Walt
Team Owner
Joined: Jan 2003
Posts: 20,306
Likes: 242
From: Summerland B.C. Canada
I would look at your TB electrical first. All connections tight ??
You can verify if the IAC is working by jumping "A" and "B" on the ALDL. The IAC motor should be humming as it's trying to close the gap between pintle and seat.
TPS voltage can be checked with a DVM.
All vacuum lines connected correctly ??
Gives you something to do till you get your fuel pressure gauge.
Good luck
