Too much fuel

USPOOLBOY101

MEMBER
1995 CHEVROLET S-10
6 CYL
4WD
AUTOMATIC

1995 s-10 4.3 liter; too much fuel I stopped at convenience store and truck would not start replaced fuel pump, o2 sensor, plugs wires, cap, rotor. Truck started but now white smoke out tailpipe. Had heads rebuilt, new cam and lifters, water pump. Started but ran rough had to get to muffler shop for exhaust to be attached and was blowing lots of fuel in exhaust, changed spider fuel injector and it started ran for 3 seconds then backfired and will not start I believe the excessive fuel was still being pumped in. The truck ran fine before it quit now after almost a thousand dollars it will not run and I am at my wits end. Please any help would be greatly appreciated. Thanks Ed

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Open the spider and check the fuel pressure regulator and Nut kit if its leaking-been here before

Probable causes of an engine running rich are as follows:

1. Fuel pressure not within specs. Can be cause by restricted fuel return line or defective fuel pressure regulator.
2. Defective Oxygen Sensors.
3. Leaking injectors.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.