Hi, I'm french and live in Canada so I might not always use the right mechanical terms.
I have a 1982 Corolla DLX from California. The motor wasn't running smoothly. I changed the carburetor with a rebuilt one bought in the states just to find out that the new carburetor cannot function properly. You just couldn'T make any adjustements on it when it was installed. I put back the old one and got it adjusted pretty well with the motor running at 750 RPM. The car was still a little shaky, so I bought a ''advanced timing light '' to get it timed. The car is supposed to be at 7 degrees before TDC. I put the timing light at 7 degrees to have both marks (the one on the driving pulley and the one on the block) lined, BUT there is nothing visible when the timing light is at 7 degrees. I need to put it up to 50 degrees to be able to notice both marks getting somewhat lined (weird). I go for a test drive and when I accelerated the motor just started to overspeed like crazy. There is NOTHING I can do to make it stop. The motor is just racing.
Could the problem be the timing chain jumped a tooth?
This would explain the unadjustable carburetor, motor overspeeding and the timing being WAY off. Changing the timing chain is a very hard job, maybe it can be something else?
P.S. BTW the car has 206000miles
I have a 1982 Corolla DLX from California. The motor wasn't running smoothly. I changed the carburetor with a rebuilt one bought in the states just to find out that the new carburetor cannot function properly. You just couldn'T make any adjustements on it when it was installed. I put back the old one and got it adjusted pretty well with the motor running at 750 RPM. The car was still a little shaky, so I bought a ''advanced timing light '' to get it timed. The car is supposed to be at 7 degrees before TDC. I put the timing light at 7 degrees to have both marks (the one on the driving pulley and the one on the block) lined, BUT there is nothing visible when the timing light is at 7 degrees. I need to put it up to 50 degrees to be able to notice both marks getting somewhat lined (weird). I go for a test drive and when I accelerated the motor just started to overspeed like crazy. There is NOTHING I can do to make it stop. The motor is just racing.
Could the problem be the timing chain jumped a tooth?
This would explain the unadjustable carburetor, motor overspeeding and the timing being WAY off. Changing the timing chain is a very hard job, maybe it can be something else?
P.S. BTW the car has 206000miles
