What causes run-on?

Thanks,

Dug

Back in the 60s General Motors devised a throttle pull off dash pot to close the throttle plate completely, to stop the dieseling/ run on. Years later it was discovered that some of the run on problem, was feed back from the alternator, after the ignition switch was turned off.

There also was some alternator feed back problems with the original Motorola alternators on the small gasoline John Deeres. The shut off solenoid cures this.

If your idle is too fast, slow 'er down. If you are shutting the thing off with the throttle cracked, quit it, Dude. :>)

And going against the grain here: All engines have carbon in 'em.....it's the nature of the beast. Show me an engine without carbon and I'll show you an engine that hasn't run yet.

Allan

Dug, is your engine a propane outfit? Missed that part.

Allan

No stink from this quarter, 'cause you are right.

The proof is in the opening up one that has had an antifreeze leak into a cylinder. Clean as a tac. Steam cleaned in fact. :>)

Allan

Wait just a darned minute. I'm old but I tain' that darned old! :>)

Yep, I've worked for lots and lots of Chevy people; 'twas the only thing I was ever smart enough to do. Whenever things went bad, I could always dive back into the Chevys 'cause I knew 'em like the backside of my hand. Did Automatic Trannys and Air Conditioning mostly; the last stint lasted from the day of the farm sale in '83 to '99. Boy! How time gets away!

That 265 V8 came out in the 55s and some, but not all of the 56s. It was the only Chevrolet V8 engine, aside from the very high-end muscle cars, that had solid lifters.

Alas, 55 was the year that I was learning to shave, tho. The only product that I'm aware of that GM has been pushing for years is the Top Engine Cleaner; which absolutely works like a charm. Saved a lot of engines from the valve grinder with that stuff.

But anyway, my uncle showed me how to pour water into those old engines and give 'em a good steam-cleaning. I think the RV crowd still uses some kind of a water injection; did when they were running the carburetors, anyway.

'Member the old drum brakes on the front and those old ball bearing type wheel bearings? Had to back 'em off a quarter of a turn?

Yep, I guess you are right, I'm just too darned old! :>)

Allan

I do remember the ball bearings. At that time dad was buying a new station wagon and was looking at Ford and Chev. I kept pointing things out on the Ford that the Chev didn't have. (Really the deal was the Ford had white walls and the Chev black. You remember white walls don't you?)

So one day when I was replacing the "ball bearings" on the front of his '56 Chev station wagon he bought (stead oh da Ford), I pointed out that Ford used rollers, not balls. Funny, current GM uses rollers. Now ain't dat supmin.

Didn't know 265 had solid lifters.

Sweetest sound I ever heard was a 265 stick shift with dual "Smittys" (glass packs) mufflers, in second gear, winding thru 3000 rpms..... .ah that was sweet. Had lust in my heart cause I couldn't afford one. Mine was a '51 Ford..... of my mother's. Yucko.....but it beat walking.

Mark

Joe

Dug