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DSteck · 02-11-2010, 12:09 PM

Seeing as how the stock pump runs out of steam, and it's not possible to get a BAP functional... how have people defeated the FPCM? The fact that it only allows 12V to the pump, regardless of input voltage, kind of hinders things, combined with the pulse width modulation. For boosted guys, what have you done to supply the fuel needed to keep going? I've heard of some people using a second pump on a hobbs switch to feed the rest of the fuel, but I'd like to avoid a rich spike when hitting boost. I'm interested in setting up a return-style system using a second pump on a hobbs and a vacuum referenced FPR to try and stabilize the pressure delta over the injectors, but I don't know if this will interfere with any diagnostics or if the PCM actually measures rail pressure. With the rail seeing lower pressure during manifold vacuum and higher pressure during manifold boost, I don't know how the PCM or FPCM will respond.

So... anybody have experience with a good, stable setup?

02-11-2010, 12:09 PM	#1
DSteck Account Suspended Drives: 2006 Corvette Z06 Join Date: Feb 2010 Location: St. Louis, MO Posts: 587	defeating the fuel pressure control module... how are you doing it Seeing as how the stock pump runs out of steam, and it's not possible to get a BAP functional... how have people defeated the FPCM? The fact that it only allows 12V to the pump, regardless of input voltage, kind of hinders things, combined with the pulse width modulation. For boosted guys, what have you done to supply the fuel needed to keep going? I've heard of some people using a second pump on a hobbs switch to feed the rest of the fuel, but I'd like to avoid a rich spike when hitting boost. I'm interested in setting up a return-style system using a second pump on a hobbs and a vacuum referenced FPR to try and stabilize the pressure delta over the injectors, but I don't know if this will interfere with any diagnostics or if the PCM actually measures rail pressure. With the rail seeing lower pressure during manifold vacuum and higher pressure during manifold boost, I don't know how the PCM or FPCM will respond. So... anybody have experience with a good, stable setup?