CHEVY MISFIRING

1990 Chevrolet Truck

Tiny

Deebear67

March, 16, 2010 AT 5:48 PM

Engine Performance problem
1990 Chevy Truck V8 Two Wheel Drive Automatic 201326 miles

I have replaced plugs, wires, rotor cap, rotor, it still misfires when you put a load on it. Also checked for vacuum leaks. What could the problem be?

FOUND 2124 RELATED QUESTIONS

Mis Fire -

17 ANSWERS
11 IMAGES

1 Answer

Tiny

rasmataz

March, 16, 2010 AT 6:01 PM

Engine running rough or misfiring can be cause by the following-inspect and test all the following listed below: 1. Defective spark plug.
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.

Please login or register to post a reply.

How to gather codes Ford Explorer
Code Read Retrieval/Clear Scion XD
How to read codes Chevrolet Blazer
Read Codes Like a Pro