I have a problem with my 82 Corolla: During high and low revs, the engine performs well. but if I make a very quick rev the engine performs badly for a second or two then the engine catches up and performs good again.
This just started happening? Stock carb on the engine? Basically what happens is when you go from idle to WOT it stutters like it wants to stall but then picks up and takes off fine, right??
Thanks for ther reply, I just bought this car from a person last week, I failed to notice its defects. What is a stock carb? Yap thats it :stutters like it wants to stall but then picks up and takes off fine. There are some accumulations of carbon deposits on the plugs but not so much. I have replaced the Ignition Coil, contact point,condenser including the high tension wires. The mechanic said am running rich. is it rue?
Good... when i mean stock carb.. I mean the factory carburetor that came on the car..
You are running rich.. hmm.. must mean that one of the carbs idle air jet passages is blocked. Replacing the jets MAY help but if it's a blocked passage you aren't truly fixing the problem. Basically you are dumping to much fuel in at idle when you stomp on the peddle so you are temporarily flooding the intake manifold. Check your plug color.. best way to see what is going on first hand.
Pull all of the jets.. make sure that you can look straight through the holes.. just hold them up to light and make sure u can see the light through the jets' hole.
Yes Sir, its a stock carb. How many jets are there? should I Check the AAP also? The plug's color at the - end is rusty and the + side is black. mostly its dry black.
I just replaced it a week ago, I've checked it again, color is only black now. I also noticed that the idling is no longer good, it seems to idle too slowly that the body shakes, but the engine does not stall during idling. And the advancer distibutor is already adjusted at the maximum advance, but there I can still hear an interval on the engine, I also noticed that there is a jet adjustment below the carb, I tried to turn it but there the engine does not respond to any turn. The mechanic said that I have a weak cylinder #1. Is it true? will it be possible?
just replaced it a week ago, I've checked it again, color is only black now.
You're running too rich. if its brown its not rust, its the correct mixture.
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I also noticed that the idling is no longer good, it seems to idle too slowly that the body shakes, but the engine does not stall during idling
Too slow idle speed and too rich mixture probably, its having a hard time iginiting the mixture. Smelling gas from the exhaust pipe?
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And the advancer distibutor is already adjusted at the maximum advance.... The mechanic said that I have a weak cylinder #1. Is it true? will it be possible?
Did he measure it with a compression gauge? if he didnt he's talking out of his ass, you cant just say "oh you got a weak blah blah blah", because the engine sounds odd . But on a sidenote, if you twisted that screw, you probably messed up the idle air fuel mixture, which can lead to burning the valves, in which case you might have a compression leak.
I can smell some gas on the exhaust pipe, He did not measure the compression, the compresion kit is too expensive I can't afford it, He said he had cleaned the carburetor. Can a small point-gap clearance of the ignition-contact point be responsible somehow? I have measured his clearance and it is much lower than .15 In. What do your instinct tell you about my problem? I have tried to twist a screw on the lowest part of the carburetor but the engine does'nt even respond until I completely removed the screw - it stalled. So I returned it back where it is used to be.
A comp kit is 25 bux here in the states.. at like autozone.
I can't tell you anyother way.. it's the only way. You could maybe measure the intake manifold vacuum.. you need to get a vacuum gauge and use some tubing to connect it to a port on the manifold.. it will give some idea..
Um... Did you try screwing it all the way in? The reason it stalled when took it out is cuz you probably flooded the engine.. Although, the idle mixture screw atleast on the 4af is covered by plastic.. you have to drill out this plastic cap to get to the screw. So maybe it was the idle mix. screw idk.. You should pic up a factory service manual.
I tried to screw it all the way in, it ran again. It has no plastic, only pointed copper screw. Why dont the engine respond in any turn of this screw, until I removed it?
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Carburetor or what?
. But on a sidenote, if you twisted that screw, you probably messed up the idle air fuel mixture, which can lead to burning the valves, in which case you might have a compression leak.
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