Sounds like the timing chain is stretched way out severely retarding the valve timing which screws up the ignition timing cause the distributor is run off the cam. Remove the dist.cap and observe the rotor button while rotating the crankshaft back and forth....this will indicate how much slack is in the chain. Any slack is too much.........!
Re: rough running 250 straight six
Mar 18, 2005
3 Replies
Key words "250 straight six" translation, no timing chain, gear to gear.
Whitelightning
Oops.....my bad
Thanks for all the help. I have been able to get the timing adjusted. I found several things wrong after going back a double checking everything. The #5 spark plug was broken where the porcelain mates to the metal. So needless to say no fire to #5. I also found several vacuum leaks, mainly ones going to the emissions canister. I've replaced the manual tranny, installed a TH 350, cleaned the carb, installed a rebuild kit, and upgraded the manual brakes to power. I should have the old truck on the road real soon. Thanks again for everyone's inputs.
Chris
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