Thread: No acceleration

Tweet

Hey all i have a 1982 camaro with a 350 LT1 in it. im having an acceleration Problem. it has No power. and i Cant Hear MY cam anymore. Feels like im Driving a 3 Cyl it dont Sound Mean anymore. im Stumped so many people told me timing carb Vacum woul appreciate the help

CamaroCanada

Need more details,,,How lumpy was the cam??,,,,,what recent tune up work,,or carb work,, have you done??,,,,the answer is all in the details.

It was a Mean Sound Now i dont hear It i changed the Plugs Cables it was Running Fine in the Last week it Got worse Now there is No power and There is a Tapping Noise. when i hit the gas hard.

sound like your timing has wandered a bit,,,also make sure there are no vaccume leaks on that motor,,,,with a lumpy cam,, your motor will generate less vaccume anyway,,so a little leak will cause big problems.
what type of coil / distributor are you using??,,,maybee swap out the coil from a known good running engine,,,and see if this changes anything.
You may want to check to see if your distributor is advancing when you rev it up,,,without advance,,it's gonna run like crap.

Other than the post above,,,,the only thing i can suggest is to move out to the West Coast,,,,,,Engines run better here,,,,and they even run on water..........Just joking.

its a Delco Remy Dist im not too sure what The coil Is And also when im Driving down the Street My Vac Gauge goes From 15psi down To 0 all it DOES is Rev. really high. takes me for ever to get to 40km hr i checked the Vavum Lines Comming from The carb they look fine.

So you dont Think it has anything to DO with the Camshaft it dont sound Like the motor is Blown at the Top end. it is just Missing The cam. and the power. i hope it is Something Minor

It also Smokes alot out the Pipes

I wont stake any money on this diagnosis,,cos it's across the internet after all,,,,,but i would be thinking,,,your cam is fine,,,albeit,,maybee a little lumpy for a street car with stock ignition,,,,what Rpm's are you running when it's at 15 pounds,,,and then what Rpm at "0"???
sounds typical though,,,,Higher lift and longer duration cams will make the engine breath a whole lot better,,,but the piston is like a compressor pump working in reverse,,,it has to suck atmospheric (air) to develope vaccume for the rest of the car,,,,longer durations on the cam will hamper the motors abillity to develope sufficient vaccume,,,,,thats why older cars with vaccume wipers and such,,would have the wipers stop in mid stroke when revving the engine,,,you can purchase a vaccume amplifier motor to attache to your engine,,,this will solve a few problems i'm sure.
But do check your coil as well,,and make sure your getting vaccume advance.

if your vaccume is almost non existent,,your engine will run rich,,because it cant draw enough air into the carb for the proper mix,,,,,,( it's only theory at this point, until we know more about the rest of your engine problems ) causing the engine to run rich and develope smoke,,,

In DRIVE its about 1000Rpms 15psi soon as i touch the Peddle to give it Gas it Goes down to 0. sometimes i have to Two Foot it. hold the Gas a bit so it dont Stall

Yeah,,,you got no vaccume at RPM,,,,,thats gonna give you headaches until you get around that problem.
You need sufficient vaccume to run the carb,,along with every thing else,like the vaccume advance,,,,you fuel mix must be richer than a son of a ***

i Dont Think it is Timing Cuz the Car was Running great but in the Last week. i noticed It getting worse everyday. it aint plugs or cables the Carb was Working Fine before i never Adjusted Anything.

Oh yeah Man It idles Fine in Park. But they smeel comming out of the Pipes Could kill ya. it Reeks.

You Got MSN MAKE It easier than on a message board