Running getting worse
Posted: Wed Mar 23, 2011 3:20 pm
Hello again,
I had a problem last year with the engine refusing to rev beyond 6000rpm and lots of hesitation/coughing.
I had the carbs rebuilt and then rolling road tuned. Whilst it was on the rollers the tuning man noticed that the engine would rev better with the aircleaner hose disconnected. He also said it was running very rich so changed the idle jets from 45's to 40's. The rev limiting rotor arm was re-set to 7000rpm and the distributor was freed off and lubricated as the advance mechanism was stuck. When i got the car back I changed the air cleaner as the old one was crushed slightly.
The car was much better after this with just a small amount of hesitation when pulling away.
Now the problem has returned with a vengance: first off it wouldn't pull beyond 5000rpm now it won't go past 4000. It also coughs and splutters in town driving. It just seems to choke up and pull no more wether I use full throttle or part.
As it feels like it's hitting a rev limiter I changed the rotor arm for a standard one but no effect. I also tried disconnecting the air cleaner hose but no difference then either.
The disributor is new (well,two years old but less than 1000 miles), coil new last year, fuel pump newly reconditioned last year.
Any ideas? I'm pulling my hair out with this!
Cheers
Robbie
I had a problem last year with the engine refusing to rev beyond 6000rpm and lots of hesitation/coughing.
I had the carbs rebuilt and then rolling road tuned. Whilst it was on the rollers the tuning man noticed that the engine would rev better with the aircleaner hose disconnected. He also said it was running very rich so changed the idle jets from 45's to 40's. The rev limiting rotor arm was re-set to 7000rpm and the distributor was freed off and lubricated as the advance mechanism was stuck. When i got the car back I changed the air cleaner as the old one was crushed slightly.
The car was much better after this with just a small amount of hesitation when pulling away.
Now the problem has returned with a vengance: first off it wouldn't pull beyond 5000rpm now it won't go past 4000. It also coughs and splutters in town driving. It just seems to choke up and pull no more wether I use full throttle or part.
As it feels like it's hitting a rev limiter I changed the rotor arm for a standard one but no effect. I also tried disconnecting the air cleaner hose but no difference then either.
The disributor is new (well,two years old but less than 1000 miles), coil new last year, fuel pump newly reconditioned last year.
Any ideas? I'm pulling my hair out with this!
Cheers
Robbie