460 No Go

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Dec 8, 2002 | 05:47 PM

Taynton1

Thread Starter

Mountain Pass

Joined: Jan 2002

Posts: 198

Likes: 0

From: Ft. Pierce Fl usa

460 No Go

Well I just finnished painting the truck over Thanksgiving and was planning on pulling the engine over Christmas But. On the way down the interstate (65 mph @ 4000 rpm) it started loosing power. I pulled to the side of the road and it sounded like a left side exhaust manifold donut leak. I could get it to start at a low idle. It would sputter and die if I tried to give it gas. After a $200 tow bill ( a freind no less) I have done a compression test (cold, won't run) and cylinders runs from 130 to 170 and the spread is averaged between the cylinders. I sprayed the base of the carb with starting fluid while it tried to start and that produced no change. I am running a MSD 6 on the engine. ANY SUGGESTIONS? I did say what the heck and have stated the task of pulling the engine but am a little concerned to rebuild and still have a problem.

Dec 8, 2002 | 08:02 PM

phantom429

Senior User

Joined: Jun 2002

Posts: 263

Likes: 1

From: British Columbia

460 No Go

Have you verified good fuel supply, healthy spark, timing chain in time, plugged exhuast. Keep on lookin, eliminate components, and you will find the problem. Keep us posted!

Nick from the frozen north
1974 F-250 4X4
soon to be 429
dana 60 front and rear

Dec 9, 2002 | 06:21 AM

rabidranger

Laughing Gas

Joined: Nov 2001

Posts: 807

Likes: 1

From: -

460 No Go

You run 4000 rpm at 65?!?! Wow. Did you spray starter fluid INTO the carb yet? That will narrow your search down a lot.

Dec 10, 2002 | 05:38 AM

Taynton1

Thread Starter

Mountain Pass

Joined: Jan 2002

Posts: 198

Likes: 0

From: Ft. Pierce Fl usa

460 No Go

I have verified fuel through carb, it is sparking because it will run at idle, but does make a noise like a exhaust manifold donut leak. How would I check for quality of spark? Are timing gear/chain problems common?

I do run 4000rpm at 65mph with the 460 to C6 to a 410 rear. I need the power to pull all those gas pumps (8 mpg empty - 6.3 with the trailer).