1996 Chevy Astro rough idle

1996 CHEVROLET ASTRO

210,000 MILES • 6 CYL • 2WD • AUTOMATIC

CHEVYDAN875

MEMBER
1 POST
FOLLOW

hi i have a 96 chevy astro with 200000 miles ..its a great truck ,but i keep getting a cylinder 3 misfire . it idles rough and has a smell of raw fuel.. i have changed everything i can think of ...IE ..injectors (spyder), fuel filter, plugs ,wires ,cap, rotor ,distributer, egr valve, mass air flow censor, air temp censor,....Compression is good around 150 on all cylinders .. please help..

Jun 10, 2010 at 2:44 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.

RASMATAZ

AUTOMOTIVE REPAIR CONTRIBUTOR
75,992 POSTS

Did you inspect the no.3 poppet valve? also the camshaft position sensor side of the distributor

Engine running rough or misfiring can be cause by the following:

1.Defective spark plug
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors/circuit
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
10.Throttle position sensor.
11.Idle air control valve.

Jun 10, 2010 at 6:34 PM