Engine "chugging"
 

I would like to ask an engine question here that has been bugging me for a few years and the possible cause. I won't blame the moderator for shutting it off here. First off the vette is fine. My "other vehicle is a 92ford 5.0 fuel injection 4x4. Has 180,000 miles and maintenance is done regularly. Thing is for several years, around town engine sounds fine and strong. I have had various engine work done like alternators, water pump, wires plugs . Bottom side was done with new bearings and seals. Thing is when ever I go out of town a few miles and start going up a hill, I get this chugging/bucking type feel going up the hill. If I step on it into passing gear, engine races up and I'm fine. Does not have to be a steep hill either. Its like a combination of a miss/chugg/who knows.

Any thoughts?

RE: Engine "chugging"
 

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Ignition timing not right at low rpm's? Vacuum leaks?

RE: Engine "chugging"
 

Sounds like it is staying in overdrive and running on torque. What speeds are we talking about? My '87 auto does that if I'm under 35mph. I just press down on the accelerator and let it shift like you said.

RE: Engine "chugging"
 

starts around 40ish when i go up an incline, does not have to be steep either.

RE: Engine "chugging"
 

Exactly, is this normal?

RE: Engine "chugging"
 

Sounds like a gearing thing. My 74Vet will do that and I give it the gas and away the problem goes.
Cause is the 3:36 rear and a Healthy cam.

RE: Engine "chugging"
 

Yup, that's normal. A combination of low rpms and high gear. You are low on your power curve.

RE: Engine "chugging"
 

Like Starship said, I believe it is normal when the rpms are low to a certain extent and the tranny is still in OD. If the incline were a little steeper it will down shift on it's own Like mine does. I don't think it is anything to worry about but you can check with your local tranny shop to be sure.

CH. By the way...That's a great looking vette.

RE: Engine "chugging"
 

Thanks, just basic black and some decent wheels and tires.

RE: Engine "chugging"
 

Black...The ultimate color for any vette! My C3 is soon to be.