Engine/Transmission (1998.5 - 2002) Rasp installed

[Brand-X]

I took my truck off from the road two weeks ago because my fuel pressure had been getting low 9-10 psi max and could pull it down to 5. I got the line kit from opoole had a hard time getting it to prime replaced the transfer pump and it did not help. I could only get 7 psi on my gauge even with the rasp. I got a different mechanical gauge found out I was at 45 psi at idle and 60 psi at 2600 rpm. I called Bill K he said cut three coils from the spring in the regulator I cut 2 thinking I could always cut one more Listen to the pros. I am still a little high at 18 psi at idle and never over 23 I will run it for a while if it don't come down any cut the next coil off. My whole fuel pressure problem was the isspro Isolator I now have fuel running to the gauge and it is accurate. Time for some mach 4s and a turbo Oo.

 

[RAJohnson]

I would sher hope your gauge never fails If it does your going to have fuel in the cab Unless you have it mounted outside

 

[Supermod56]

You better check your plumbing, my Rasp was 18 out of the box, and I lowered it to 15 at idle/full speed. My race car uses the same exact by-pass, so I had softer springs laying around to correct it, cutting coils makes them erratic. I would try a 3rd gauge to confirm that pressure, sure seems like a lot of pressure for a RASP



Tom