I have a lt10s with x4 ignitor and Moroso coils. The car ran fine with A/F at 11.4 to 11.9 under boost and 12.8 to 13.4 at idle and low load running. So a couple of days ago the car just stalled when I went to pull in to my driveway. I started it back up and it was running very rich. It will clear up if I rev it but as I let off, it loads up and stalls.
List:
Have controller and wideband
Checked all wiring OK
Changed 02
Could not pull fuel out to make it run right
Changed plugs
Coils and wires are new with good spark
A/F are reading 11.4 to 10.8 at low RPM on both controller and wideband
TPS appears to be sound

I would like some help as to where else to look or if anyone has had this problem. I wonder if the computer has gone bad?
Thanks in advance for reading,
Glen

 

Computer dosnt go bad.


You need to check your fuel pressure and tell us where that is.
What makes you think the car is running rich? just the wideband?
it sounds like one of your injectors getting stuck?

Have you checked your earths to see if they are coming loose?

 

My fuel pressure is the same from when I installed the motor, 38lbs. I pulled one of the primary injector connectors and it would not start. I guess I should do the same with the other. I also checked my TPS to make sure it was not jumping into the load map but it was right.

 

Like rx72c said one of your injectors is stuck open .

 

Pull all your injectors out. ANd get them checked to make sure they are not leaking etc.

ANd then we go from their.
Troubleshooting process can be time consuming and expensive, but it has to be done, and you have to eliminate an item before you move onto the next.

 

Thanks so much guys. I am on it. I will stay in touch
Glen