1971jim0

I have a 1984 vett that runs rough. It feels like a miss when you get on the throttle. If you go real easy on the gas the car will not hesitate at all. also, when I get on the throttle i will get A backfire through the engine not the exhaust. can any one help me.

AQUILA163

How old are the plug wires and the distributor cap?

1971jim0

all plugs,wires ,cap.and rotor replaced within 6 months problem has not gone away any help would be appreciated

The Plastic Lizard

Whenever someone says 84 idle problems...I say crossfire stumble.

Balance things by reading the articles here

http://www.thecubestudio.com/Crossfi...yBalancing.htm

corvettenorway

ignition timing + fuel pressure !!!!!!!!!!!!

Tom400CFI

with this^.

And the "give-away" is this...Classic sign on lean a/f ratio, and/or timing.

Check your ignition timing...check you fuel pressure.

1971jim0

Thanks I will check timing and fuel pressure. Will let you know how it turns out

Hot Rod Roy

I'd suspect a vacuum leak. The top plate of the cross-fire manifold is a suspect area. There's a bunch of bolts in this area, and the gasket surface area of this plate is pretty skinny. Try tightening these bolts before you replace the gasket.