timing creeps out...
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Elder User
Joined: Mar 2003
Posts: 541
Likes: 1
From: Phoenix Az, by way of Fre
timing creeps out...
Truck was running horrible lately. '69 390 fresh stockish rebuild.
Hard start, would not idle on it's own, hesitation, stumbeling, backfireing... you name it, she did it... one miserable old girl.
Had time to play with her last night.
Checked timing, and it was so far off it was scary. Must have been darn near -20*! dunno, just a guess.
I reset it to 6*, adjusted the idle, and marked the distributer. I assume the distributer is moving on it's own.. ? Is that normal?
Points were fine.
I also hooked up the manual choke last night, made my morning start up nightmare and walk in the park.
Life is once again good, with 35 year old riggin'.
Just thought I'd share.
Hard start, would not idle on it's own, hesitation, stumbeling, backfireing... you name it, she did it... one miserable old girl.
Had time to play with her last night.
Checked timing, and it was so far off it was scary. Must have been darn near -20*! dunno, just a guess.
I reset it to 6*, adjusted the idle, and marked the distributer. I assume the distributer is moving on it's own.. ? Is that normal?
Points were fine.
I also hooked up the manual choke last night, made my morning start up nightmare and walk in the park.
Life is once again good, with 35 year old riggin'.
Just thought I'd share.
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
The clamp should be arched UP in the middle. That way it will pull down on the dist. when the bolt is tightened. If it is arched down in the middle, it may NOT be touching the dist. flange enough to hold it.
After tightening it, try twisting the dist. If you can not muscle it around, then it should stay.
After tightening it, try twisting the dist. If you can not muscle it around, then it should stay.
Senior User
Joined: Sep 2003
Posts: 497
Likes: 0
From: Houston TX
I bet your lock pin on the distributor shaft/gear is sheared off. I had that problem on mine when I first got the truck. Check and make sure you are actually locked down as the others said, but if it's locked, and still moving, the pin is sheared off. You'll need to yank the distributor and you'll see the pin down towards the bottom by the gear. Any auto parts should have a pin to fit. I found one at autozone...Worst comes to worst, you can buy a whole new unit fairly cheap. But replacing the pin will fix it.
When you replace it, make sure it's set right. IE: cyl 1 on compression stroke, and the rotor pointing towards #1 wire on the cap. MK
When you replace it, make sure it's set right. IE: cyl 1 on compression stroke, and the rotor pointing towards #1 wire on the cap. MK
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Good point NM5K..........been there. I've had the pin shear and shut'r down. It will be going along nice an easy and then it starts losing power ti it quits running. Baffled the heck out of me. Pulled the dist. and found the pin sheared.
I have since double pinned it. Course this is in my 428 and I run it a bit harder than most. Plus it pushes 100 psi of oil pressure and all the strain on the single pin will cut it.
Larry
I have since double pinned it. Course this is in my 428 and I run it a bit harder than most. Plus it pushes 100 psi of oil pressure and all the strain on the single pin will cut it.
Larry
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