by "Pixel" (Improbcat)
Published 08/15/2017 at 22:44
by "Pixel" (Improbcat)
Published 08/15/2017 at 22:44
No Tags
STARS: 14
Ever since putting the “new” used engine in the ‘64 for the Opposite Lock Rally , I have been battling a rough running issue. It ran good at the start, then got progressively worse as the day went on, ending up nearly undrivable by the time we got home after the 450 miles.
I found
the distributor was hilariously worn
, and a new one(which came with a cap & rotor) seemed to fix it, then it got bad again. It would run a little rough at idle, randomly bucking or shuddering a bit, and doing the same when driving. However if I drove for a while it would get worse and worse, ending up with the whole truck shaking and a lot of two-footed driving or messing with the manual choke to keep it running.
I thought it might be the old plug wires (swapped over from the old motor), so I changed those. Then I thought it was the coil, so I put a higher-output Firepower one in in place of the old OEM.. Each time it would run better for a while, then go back to running like crap.
Yesterday I swapped a new points plate & setup in, in case the Pertronix ignition unit was bad, it ran & idled fine last night, but driving to work it started stuttering madly when accelerating below 3K rpms. It was hell getting it home as it kept acting worse and worse.
I decided I needed to start from baseline. So I pulled the plugs to check for a bad cylinder. They were all the same and normal looking. Next I pulled the distributor, found TDC with a piece of welding wire to ensure the balancer hadn’t slipped, and stabbed the distributor back in. I re-assembled everything, set some initial advance and started it. While tuning by ear to something close enough to run, I could feel the distributor was slimy and the wire boots were arcing to my hand. I’d never noticed either of these before. I left it running for a while while checking in occasionally, and low and behold, I found the dumbest cause ever.
The upper heater hose goes on a nipple just above and ahead of the distributor on these old 250 inlines. It had a pinhole leak that, when hot, sprayed water & coolant right on the distributor, causing it to arc all over the place.
I cut & re-attached the hose (new ones are now going on this week), and sprayed the distributor with WD40 (using it for its designed purpose for the first time in my life), and the truck runs amazingly better.
"themanwithsauce - has as many vehicles as job titles" (themanwithsauce)
08/15/2017 at 22:55, STARS: 2
That was some top shelf diagnostics to figure that one out. GOod on you for not just giving up and selling it “as is” on CL and making it someone else’s problem. I don’t know if I’ve had any similar issues like that. So hopefully that was the end of it and it’s smooth sailing from here on out.
"MM54" (mm54mk2)
08/15/2017 at 23:00, STARS: 3
Glad you found it - that’s a fantastic issue, though.
"Lumpy44, Proprietor Of Fine Gif" (lumpy44)
08/15/2017 at 23:49, STARS: 2
Ya I have seen that happen with an alternator before too. Is that a vault-tec logo I see?
"pip bip - choose Corrour" (hhgttg69)
08/16/2017 at 06:01, STARS: 1
well done on finding the cause of your issues.
"shop-teacher" (shop-teacher)
08/16/2017 at 07:05, STARS: 2
That is wild! Good job tracking that one.
"Pixel" (Improbcat)
08/16/2017 at 07:55, STARS: 2
It is. I painted it to match a trauler i had.
"Lumpy44, Proprietor Of Fine Gif" (lumpy44)
08/16/2017 at 11:35, STARS: 2
Now I remember all that Fallout stuff. Nuka-Cola machine too correct?
Almost got my fallout radio/pc case done! Green lights backlighting too
"chap_in_the_bowtie" (doctor-mike)
08/20/2017 at 11:16, STARS: 1
Love your shed door artwork!!