quote:

ORIGINAL: rmolina41

I have a 1990 Ford F-150 XLT, 5.8L, Automatic with 107k miles on it. 

My truck at times has problems starting. 

I can leave the key in the RUN position (just short of the cranking position) and hear (what I think are) the fuel pumps (it's a dual tank) buzzing.  As long as there is a buzz sounding, the truck will crank nicely (strong battery) but never start.  It can sit and buzz for anything from 2-3 seconds to what seems like half-an-hour.  Sometimes it will stop buzzing, sometimes I give up because it has simply taken too long.  It seems to affect both tanks equally.

If I try cranking the engine after the buzzing has stopped, Voila! the engine starts right up.

It's almost like it loses fuel pressure or something.  The weird part is that this does not always happen, it may be temperature related, I tend to think it happens more often when it is warmer, but not absolutely sure.  But I have had times when it will not start after sitting for an hour, others when it will start when sitting for two or three weeks.  Not exactly what I would expect from a fuel pressure leak.


I have new fuel pumps. 

TIA