Okay, about a month ago I rebuilt the 305. All new gaskets from the heads up. Resurfaced the heads and had a valve job done. New oil pan gasket, rod bearings, and oil pump on the bottom end. I also replaced the EGR valve, distributor cap, rotor, and plug wires (spark plugs are still kinda new). And finally, I had the throttle body rebuilt and the injectors cleaned. After all this, my engine still seems to be missing at idle. The timing is set at the factory 0* and I'm running 89 octane fuel.


I'm not even positive it's a miss. But when the car is idling the RPMs will drop real quick and the car will sometimes shudder. Also, the exhaust stutters for that moment. It's not a constant thing. It only happens every couple if seconds at a red light. And it will do it maybe three times in succession at most. Driving around, it drives like a dream. So what the hell happened? It's been driving me crazy!

 

I forgot to mention we got new piston rings too. I don't think that would affect it, but just throwin it out there.

 

try advancing to 6* BTDC, isnt that the stock base timing. and it doesnt sound like a timing problem anyways, it sounds more like a miss-aligned sensor, mayb your TPS sensor, if your TPS sensor is fukt up then itll run shitty at idle and run good everywhere else

 

0* is the stock timing for me. And I had it set at 4* (where it was before I rebuilt the engine) and it only seemed to get worse. I'll look into the TPS thing though. Thanks for the suggestion.