Pamm r

My 5.0 always starts quick. But now that the weather outside is warming up I have noticed it starts fine in the morning but after outside temps warm up and I drive a bit, turn off motor then and shortly after trying to re-start. It has to turn over several times now to start..... Any help on what I can check???

Steve83

Check these:


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Japsican

Have you checked or changed your fuel pressure regulator? I had the same symptoms in my old Silverado, turned out to be an easy fix with replacing the fuel pressure regulator. It would crank fine in the morning, but as soon as it warmed up, it would have to crank a bunch of times before it would finally start again.

Pamm r

Well told it is one of these: coolant temp sensor, or mass air flow, or Fuel Pressure regulator. Anyway that I can rule out any of these????

BLDTruth

A bad coolant temp sensor would shut off fuel delivery completely and it would not start until the engine cooled down completely....at least that is what happened when mine went out.

A bad mass air flow sensor would be highly unlikely, but its possible.

Fuel pressure regulator is the most likely culprit. First thing you can do is pull the vacuum line off of it and smell for gasoline - if its present, you need a new FPR. Or, when the truck is warm and exhibiting the condition where it takes several times to finally turn over, pull the vac line off of the FPR and see if it starts right up. The FPR is there to restrict fuel pressure - removing the vacuum line should remove all restriction and allow the fuel pump to operate at maximum operating capacity (40-45 psi).

Having a fuel pressure gauge handy to help diagnose is ideal.

Pamm r

bought a scan tester, i will see what it shows , thanks, i'll update ya