460cid Sputtering On Take Off
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From: NEAR WILKES-BARRE PA
460cid Sputtering On Take Off
A Friend Of Mine Has An 86 F250 W/ A 460 In It, And When He Goes To Take Off It Back Fires Through The Carb. But When You Are Sitting Still In The Drive Way It Idles Great With No Rough Idle. It Has New Plugs,wires, Cap Rotor, Distributor, Carb Is Rebuilt, Timing Is Right On The Money And I Can't Find Any Vacuum Leaks.
What Am I Over Looking? This Truck Has Been Sitting For About A Year Before He Bought It A Week Ago.
Can Anyone Give Me Any Ideas?
79 Bronco Nut
What Am I Over Looking? This Truck Has Been Sitting For About A Year Before He Bought It A Week Ago.
Can Anyone Give Me Any Ideas?
79 Bronco Nut
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Joined: Nov 2002
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From: Littleton, CO
Sounds to me like a carb issue, something in the settings for the power valve. Just because it was rebuilt, doesn't mean it can't take a little tweaking. Was it purchased rebuilt or did someone do the work?
Welcome aboard, --Mike
Welcome aboard, --Mike
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From: NEAR WILKES-BARRE PA
Thanks For The Info, Someone Rebuilt The Carb, I Was Also Informed That The Vacuum Line Going To The Automatic Tranny To The Modulator Could Be Leaking Or The Valve It Self Could Be Bad. Did You Ever Here That Problem?
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Joined: Nov 2002
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From: Littleton, CO
Could be. Was the truck running when it was brought home? How is the gas in the tank/engine. Was it drained and filled new? A rebuilt carb will have good innards but still require set up. Most do not run perfect, even out of the box... Can you take the whole vehicle to the individual who rebuilt the carb and get them to fine tune to your motor?
--Mike
--Mike
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From: NEAR WILKES-BARRE PA
Well I was just informed that with it idling, you could take off the No. 1 plug wire and the engine doesn't make no differance. It does this on a couple of cylinders. I'm starting to think he has a cam or valve problem.
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From: Escondido, CA
You checked ignition timing but did you check the timing chain set for wear? This could be another possibility that can be quickly fixed.
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From: NEAR WILKES-BARRE PA
thanks for all the info guys, he found the problem, it was a stuck EGR valve. He said its running like a rapped ape know.
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