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Heavy Knocking


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#1 Guest__*

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Posted 08 March 2003 - 04:37 PM

Here's the issue:
Its a 58 Olds 88 with a 371 - rochester 4bbl. In park/nuetral the car will rev great with no apparent problems. Once in gear it will run OK for a couple miles. Then as you give it gas it start to knock very heavily, when you let off the gas and come back to idle it runs fine. Sounds like a timing problem under load. The centrifical advance mechanism appears to be fine as does the vacuum advance. Any ideas?

#2 another old car

another old car

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Posted 10 March 2003 - 01:05 AM

this is just a guess , you didnt say how many miles on car
if its a high mileage engine , you might need a timing chain
is it a knocking sound or spark knock
RJ
1971 Jeep CJ5
1941 Olds Dynamic Cruiser




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