oldskoolracer
Active Member
Hey there all, havnt posted much on here and I have looked all over for info but no luck so I need to ask a couple questions. Some of you may have an answer and be able to help me out...
Car is a 78 Plymouth Volare wagon. Factory 225 super six, a904 trans. Rebuilt the engine, trans, replaced all hoses, belts, gaskets, pumps, starter, alt, dist, HEI conversion, etc...
I have managed to get the car to run decent at best, but I am to the point of being beyond frustrated and am getting sick of pouring money into it. Heres the issue, if I adjust the carb/timing where it is idling nice and smooth, good vacuum (max I can get is about 18-19in) has decent throttle response and over-all decent driveability with the cost of it trying to run-on after the key is off. On the flip side, I turn the timing down till the engine is still fairly smooth but idles low it doesnt seem to try running-on as bad but throttle response and driveability is crap. Dies everytime the throttle is opened and has NOOOO power under load. Have tried several initial timing from 0*-12* btdc with and without vac advance hooked up.
I have thoughts/theory on the exhaust being partially plugged but feels to blow pretty decent at the tip so Im not sure. Can it be clogged enough to cause detonation/run-on and still blow out the tip, or should I be looking else where? Ive tried dialing this thing in everyway I can think and just replaced the carb all-together trying to remedy the issue with no luck... Any advice or info would be beyond appreciated. Like I said Im at my wits-end with it and just need some help!
Car is a 78 Plymouth Volare wagon. Factory 225 super six, a904 trans. Rebuilt the engine, trans, replaced all hoses, belts, gaskets, pumps, starter, alt, dist, HEI conversion, etc...
I have managed to get the car to run decent at best, but I am to the point of being beyond frustrated and am getting sick of pouring money into it. Heres the issue, if I adjust the carb/timing where it is idling nice and smooth, good vacuum (max I can get is about 18-19in) has decent throttle response and over-all decent driveability with the cost of it trying to run-on after the key is off. On the flip side, I turn the timing down till the engine is still fairly smooth but idles low it doesnt seem to try running-on as bad but throttle response and driveability is crap. Dies everytime the throttle is opened and has NOOOO power under load. Have tried several initial timing from 0*-12* btdc with and without vac advance hooked up.
I have thoughts/theory on the exhaust being partially plugged but feels to blow pretty decent at the tip so Im not sure. Can it be clogged enough to cause detonation/run-on and still blow out the tip, or should I be looking else where? Ive tried dialing this thing in everyway I can think and just replaced the carb all-together trying to remedy the issue with no luck... Any advice or info would be beyond appreciated. Like I said Im at my wits-end with it and just need some help!