CAN ANYONE HELP ME........................

[billyg2187]

I have a 1986 chevy monta carlo 305 engine.. Well the motor has a miss on the driver side of the car only. This is what i did to it so far I put new excell cap,coil,rotor,wires,and plugs in it and it is still got the miss. So i checked the copression on each cylinder it is 150 psi. I check the fuel presure and it is 5 psi at rollover and about 8 psi when running. Plus i put a brand new timing chain and gears in it to.....

[homewrecker john]

What oil are you running in it?

[billyg2187]

i just gave it an oil change to day  10/30 motor oil it was 23 dollors a gallon

[Proud and Powerful]

did the miss just start or has it been losing power check your cam lobes sometimes they go flat on a lobe causing your prob.  Really hard to say with out looking at it all you should have to do is pull vavle cover

[billyg2187]

yes it just start but already pulled the vavle covers and they all move just fine.

[homewrecker john]

did the miss just start or has it been losing power check your cam lobes sometimes they go flat on a lobe causing your prob.  Really hard to say with out looking at it all you should have to do is pull vavle cover

being a flat tappet cam....depending on the oil that you are using...this is what i suspect being the problem.

[73chevytruck]

did you put your 5,7 plug wires back in the right place, 18436572

[billyg2187]

yes put plus wires back in place right pulled cam out of it this morning and the cam is fine

[billyg2187]

well just put new cam in and still has a miss on drivers side of motor

[ProGrade]

how'd the old plugs look? any discoloration or residue?

Also did you pull the entire distributor assembly and check the gear out?  Worn teeth could be the problem.

[Blazin40s]

Adjust carb?

[billyg2187]

already Adjusted carb did not help and even put another  carb on it and it didnt help once so ever one was a 600 and the other one was a 500 so i dont know 

[Disturban]

well just put new cam in and still has a miss on drivers side of motor

And how do you know it is happening on the drivers side?

[7d9_z28]

sticky valve?

[Jjay78]

weak or broken valve spring?? also have you checked all your rocker studs, has one of them risen a little bit? had a 305 do that once, ended up having to install screw in studs cuz they just started pulling out one day, which caused a loose rocker and thus a valve to not open fully and that in turn caused a miss on that old motor, just a thought for ya.

[Thumper]

sounds like a valve problem, maybe one got burnt/cracked or maybe a bad lifter

[ABlockhd]

got a 305 out of  early 80's camaro that you can buy for 50 bucks if it'll help you out with some parts. 

[old school truck dude]

Does it still have a miss?

[BAD APPLE]

Sounds like possibly a bent vavle, or maybe just needs the lifters adjusted