Stalls when put in drive....

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May 30, 2016 | 03:28 PM

#16

HIO Silver

Fleet Owner

Joined: Dec 2009

Posts: 20,678

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From: NorCal

Quote:

Originally Posted by DonE911

77 F150 4x4 400 C6 NP203

New (points style) distr, MSD ignition, cam, intake, rebuilt 1405 edel. carb.

The problem I am having is the truck will idle great, rev pretty good just sitting still. As soon as I put it in gear it sputters and pops and just wont move more than a foot in either direction without stalling. If I rev it up and drop it into gear I get the same thing.

I have sprayed the intake area with carb cleaner.... sprayed around vacuum lines and base of carb and no indication of a leak. I've rotated the distr looking for a slightly better timing but same result. No timing light or vacuum gauge.

I'm not the greatest mechanic, so I am stumped at this point. I didn't install the cam, intake, distr..... a friend did that, but it idles great so I think the timing must be within the adjustment zone.... It would not run if he installed it wrong right?

what am I missing??? The trani functioned fine before the upgrades and this doesn't really feel like its a tran issue....

The only other clue I have is that the carb adjustment screws don't make much of a change at idle.... all the way in or out it still idles okay. I did the rebuild so I'm sure it was done correctly.

Thanks in advance

Go back to basics and reset the initial timing and initial carburetor settings..... that means finding TDC and verifying everything is square - dizzy orientation too.. The vacuum at only 12 Hg at idle suggests the initial timing is off and whatever tuning was supposedly done was not done right.

You do have a timing light, right?

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