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Just a follow up. Whipple sent a new pump under warranty/ installed and no more starting issues. with the bad pump out I lightly blew into the discharge port of the pump, went right through. Tried on the new pump, all good. Check valve did the job

Thank you!!!!!

So checking my 10r80 fluid and fluid is at the #4 on the stick. I don’t have the A B C like others.... do you check it with the engine running ? What number should be filled to the dipstick??

Mine was the same with the Whipple tune. Went away with the Lund tune.

Once the car sits for a half hour or so it cranks for 3-5 seconds and starts every time. This only started once I installed the dw400. In fact when I unhooked the discharge line from the fuel hat with the stock pump there was a good amount of pressure that bled off. When I unhooked again with...

There is a check valve and it’s a auto car for what it’s worth.

Thanks for the info!

Wondering where you heard about not icing the top of the Whipple??

Anyone ever have a check valve fail in a dw 400 fuel pump? Brand new pump , made sure clamps are all tight twice. Engine is cranking longer than normal to start. Data logs show 0 psi before engine cranks over.