tampa95f150

995 xlt 4.9 6 cylinder. had transmission rebuilt 2 months ago. 210K miles. new brakes + rotors + drums, shocks, fuel pumps, radiator to bring truck back to life. had been sitting for about 2 years.

PROBLEM: when coming to a stop the truck violently shudders and stalls. put it in park and starts right up. after the truck has run for a while (30 minutes) the problem disappears. took it back to transmission shop - who has a good reputation, seems well run, clean etc. owner test drove to duplicate problem.

has anybody heard of this and have any other initial thoughts? another f150 owner suggested to first look at both the IAC and EGR valves. i don't think it's the transmission. it's some kind of air / vapor lock issue? btw: the front fuel pump has failed already. could the problems be related?

any help would be appreciated!


scott

P.S. this website has been very valuable as i go down this restoration journey.
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Chris_1

iTrader: (1)

Get yourself a fuel pressure gauge. You can test the system in a few minutes and it will tell you if you have a fuel pressure problem or if you should be looking elsewhere. No guesswork. Guessing gets real expensive real fast.

fltdriver

Also pull your codes

IAC walk through if it passes the FP test
http://www.fullsizebronco.com/forum/...d.php?t=206960

One thing I always recommend is replacing the vacuum lines especially if they are OEM colored plastic, 22ft of 4mm line gets all of the small diameter ones. I used these, http://www.siliconeintakes.com/silic...686d47fdf65361, but you can get regular rubber lines for $0.50/ft from local auto store but they won't last anywhere near as long. Also need a 4-way vacuum tee or two 3-ways.