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Old 11-14-2017, 01:53 AM   #9
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Join Date: Jul 2009
Location: Monterey/Falun

Originally Posted by Tfrasca View Post
So, I've had this Aeromotive FPR on my 142 since I did the engine swap. It's about 6 months old, I'd say.

It never help line pressure after the pumps primed, and the needle on the gauge always fluctuated up to 7-8 psi. I was getting my TLAO chips dialed in with my light blue (390cc?) injectors, but I couldn't escape a nasty lean condition under boost toward 5k rpm. Increased fuel pressure to 58 psi, and the FPR would BARELY get there. It should be capable of 30-70psi base pressure, so I took it apart to see what was up.

Sure enough, the hole that the ball valve should seal against was worn unevenly. They apparently just drill a hole, after the base is already anodized, and don't put a radius or chamfer on it. I used a counter sink bit and milled a chamfer on the seat by hand, carefully.

It seals much better now. Still leaks residual pressure after 10-15 seconds, but holds running pressure rock steady on the gauge. I've adjusted FP back down to 43 psi and am actually a bit rich at 12 psi with a 19t.

TL;DR - Be careful with these Aeromotive FPRs. Had I not installed a wideband when I did, I probably would have lost a piston...
What main pump are you running? what are you doing for wiring? do you have a inline check valve fitting on the pump. mine drops off pressure after i turn the key off like instantly but that is because no check valve on the pump and im using a in tank. base fuel pressure is at 38 in vacuum and doesnt run lean all the way up to 17psi
1979 Volvo 244DL 6.0/4l80e,8.8,Ms3x goldbox ecu and Mircrosquirt tcu, GTX4202r, 228/230cam, tbss intake, 11.4@123mph 9psi
1991 Volvo 245, Efan conversion, tcam, 4.10s, Aw71L
1982 Ford Fairmont Futura, 4.8/th400, 8.8, mircrosquirt, 7875 turbo, 228/230 cam, Project Cheap Thrills

Originally Posted by bricktop420 View Post
Thank you very much everybody... i now feel sufficiently retarded and will go cry in the corner...
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