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87 s10 distributor or timing question.

07-07-2003, 10:32 PM
alrighty...i jus picked up an 87 s10 from a friend of my dads...for some reason you have to advance the distributor or timing to get it started...anyone have any idea why we would have to do this to get it to run?

07-11-2003, 10:02 AM
Any luck with your problem? Was the distributor pulled at some time?
I have noticed on my 87 that the distributor can be reinstalled and the timing even set and the truck will run, even if the distributor was not reinstalled correctly.

07-11-2003, 12:27 PM
Check Your timing chain. The engine could care less how the distributor is set in as long as it is in time and the spark plug wires are in the firing order on the distributor cap.

A good way to check the looseness of the timing chain is to remove the distributor cap and turn the crankshaft both ways until the distributor rotor moves. If the crankshaft rotation is excessive you need to replace the chain and gear set.

Good Luck!

07-11-2003, 12:32 PM
I want to add, that if you check the timing with a timing light and the timing mark seems to jump around on the balancer, that is also an indication of a loose timing chain.

Good Luck as always!

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