Lead foot death
New User
Joined: Apr 2002
Posts: 5
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From: Orange, CA
Lead foot death
[updated:LAST EDITED ON 09-Apr-02 AT 01:48 AM (EST)]I've been working on rebuilding my girlfriends 86 Bronco after an engine fire on the way home frm buying it. I've got it all fixed up and running good, exept for on problem: If I floor it it stalls, and dies. If I feather the pedal it runs and accels fine, it just has a dead spot when accelerating about a quarter of the way down with the pedal.
It's got a 351w, Holley 4180, & a C-6
I've rebuilt the entire vacuum system, and replaced the distributor, and al lot of other things. A vacuum gauge flutters just a little when I hook one to a manifold vauum. Othe than that the damn thing runs great.
Any help would be great.....
It's got a 351w, Holley 4180, & a C-6
I've rebuilt the entire vacuum system, and replaced the distributor, and al lot of other things. A vacuum gauge flutters just a little when I hook one to a manifold vauum. Othe than that the damn thing runs great.
Any help would be great.....
Tuned
Joined: Mar 2002
Posts: 405
Likes: 2
From: Ft. Walton Bch 32547
Lead foot death
I could be wrong, but it sounds to me like you aren't getting enough of a squirt of gas from your accelerator pump on your carb. Did you rebuild the carb after the engine fire? Maybe the diaphram in the pump got scorched during the fire. You can check this by looking in the carb and opening the throttle by hand.(you probably know this) Anyhow, this would be the first thing I would check.
Junior User
Joined: Oct 2001
Posts: 94
Likes: 0
Lead foot death
A fluttering vac. gage would notmally lead me to believe there is a valve problem. But in this case i agree that it is a carburator/fuel delivery problem.
-Jon
-Jon
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Senior User
Joined: Jul 2001
Posts: 190
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From: Warrenton, VA
Lead foot death
Has the fuel pump been replaced? Also, is the ignition timing correct?
WrenchHead
1979 F-150 Custom. 302 V-8 4-spd 2WD. 121,000 Miles
WrenchHead
1979 F-150 Custom. 302 V-8 4-spd 2WD. 121,000 Miles
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Senior User
Joined: May 2001
Posts: 198
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From: Baltimore USA
Lead foot death
I think I just solved my problem. I swapped the card with the one on my 85 bronco that I'm taking apart. The 85 had no problem running. While I haven't had the time to see how the start is on a cold and wet morning, it is already running better.
New User
Joined: Apr 2002
Posts: 5
Likes: 0
From: Orange, CA
Lead foot death
Just thought I'd updat this thread. We had a $1100.00 valve job done and the culprit ended up being two burnt valves #'s 6 & 7. Runs good now, still doesn't run like a 351 HO should, bust a vast improvement.
Thanks Everyone for your help.
Thanks Everyone for your help.
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