just got car back from mechanic and it runs worse
#1
just got car back from mechanic and it runs worse
Just got my car back from my local mechanic (very good rep) and it is running kinda crappy now.
I sent it in to get the timing and carb set, gm 350 crate motor, and when I got it back it drove home fine. After it cooled down I took it for another spin and It started backfiring through the carb. it did that before but only once in a while. They said that it was advanced 20 degrees when I brought it in and backed it down to 10 btdc. does that sound right? and if it does do you think fouled plugs may be the issue?
I sent it in to get the timing and carb set, gm 350 crate motor, and when I got it back it drove home fine. After it cooled down I took it for another spin and It started backfiring through the carb. it did that before but only once in a while. They said that it was advanced 20 degrees when I brought it in and backed it down to 10 btdc. does that sound right? and if it does do you think fouled plugs may be the issue?
#3
one thing I forgot to add is that on my paperwork they wrote down that my engine was a 305 on the info section and 350 for the comments. Maybe its possible they got it mixed
#4
Could be its mixed up.. also, turn the ignition off before messing with the dizzy.
20 degrees is way too much, ten is more like it... however, its a starting point. depending on the year and actual displacement it will be lower, closer to 8. A backfire through the carb is a good indicator of timing issues.
I would take it back and raise cain.
20 degrees is way too much, ten is more like it... however, its a starting point. depending on the year and actual displacement it will be lower, closer to 8. A backfire through the carb is a good indicator of timing issues.
I would take it back and raise cain.
#5
Hopefully it just slipped timing,did you get on it hard at all on the way home?
My old 427 would get out of time after a few hard runs and I'd have to turn the dizzy back,always kept a mark on the intake and dizzy to line it back up to.
A worse case might be a bad timing chain,slack in the chain can cause torque pulses on the dizzy and make it move,soon after it will jump a few teeth and you'll be bending valves.
My old 427 would get out of time after a few hard runs and I'd have to turn the dizzy back,always kept a mark on the intake and dizzy to line it back up to.
A worse case might be a bad timing chain,slack in the chain can cause torque pulses on the dizzy and make it move,soon after it will jump a few teeth and you'll be bending valves.
#6
I dont think it has anything to to do with the chain, My engine has less than 10 grand on it and I dont drive it too hard. I talked to them this morning and they said that they would take it back in. What I am worried about now is that the carb was backfiring on the 20 degree advance setting, if I drove it before it was warm.
#9
And theres 2 ways of moving timing advancin or retarding advance is earlier retard is closer to tdc if your timing is way off the marks u might wanna look at ur balancer if 2 pieced to be off or not do u have hei in cap or coil seperate?