M5 Expert (>4000)
Join Date: Feb 2001
Location: west palm beach. fl.
Thanked 1,619 Times in 1,227 Posts
My investigation shows sometimes Walbro fuel pumps cause running rich with stock fuel pressure regulators. It's possible Aeromotive to do the same. I already believe I need an aftermarket FPR... but first I'm going to test the fuel pressure.
I think others SC cars are using Walbro and Aeromotive without issues. Most people are using the stock FPR. I know I am, although I have a different fuel setup (stock fuel pump and BAP). Focusing on a faulty FPR makes more sense to me.
Good luck tracking down the issue.
Dinan Stage 3 suspension, SS jet coated headers, ESS SC kit w/ 1 range colder NGK's, 92mm pulley, 440 Big Greens, TTFS alpha N tune for meth, RK plenum plates, SBC Endurance Stage 3 Kevlar performance clutch setup, "Jed" lightened DMFW, open brake ducts, TEC cupholder, U.S.(Euro style) tilt/slide armrest, 6k HID fogs, Umnitza bi-xenon flamethrowers w/6k super white low beams, rear fogs, V1/Stealth1, dual head LI, 2.65 diff w/40% lockup/2x dynamic, compact spare, M5 logo trunk carpet, Euro trailer hitch, Mocal oil cooler, ACS type rear spoiler, Rogue custom SSK and tranny mounts, ST 355 BBK (fronts), BP sway bar brackets, Bluetooth retrofit, Speedhut boost gauge (20 psi), Dinan TB's and VS, KB BAP, Howerton/HFS-3 Aquamist WI trunk setup (50/50), with 2nd gauge in rear view mirror, aftermarket trunk mounted sound system integrated into stock unit (amps, crossovers, sub and speakers).......