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I recently installed a racetronix 340 pump in 2008 sierra came with harnes kit bulkhead connector and fuel sock. Pump works fine at idle and half throttle now at wot truck bogs and wants to die my truck is equipped with a fuel pump flow control module I need to know if anyone has been able to bypass this module or knows how to make it work with this setup. ECM has two codes p0230 p069E
Not saying it isn't, but that might not be the issue.
Sounds like fuel starvation, low pressure.
Check fuel pressure first. The FPCM default/normal setting is typically 43psi; when it sees an issue, 55+psi.
So, regardless, the fuel should be flowing, the FPCM won't do that, unless there is a wiring issue or install error.
All the installs we've done, FPCM doesn't care what pump is being controlled, as long as it's "acting" like a stock one.
I went ahead and set up a gauge had good pressure at idle. Decided to pull the pump came to find out the strainer I used wasn't letting it flow correctly causing it to starve. Also figured out how to bypass fpcm using a relay. So you were right farmtruc
Good to see u posted an update. Others will benefit. Glad u got it going.