primary fuel pump issue

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Apr 18, 2015, 05:22 PM

MP Evo

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primary fuel pump issue

I'm currently having an issue with the primary pump turning on when you turn the key on, but when using a scan tool I can command the pump to turn on. Has anyone come across this issue and what was the solution?

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Apr 18, 2015, 11:15 PM

2006GSR

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I'm pretty sure the pump kicks on when you start to crank the engine over. I know on my 9 that's how it is.

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Apr 19, 2015, 05:11 AM

MP Evo

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Well when you turn the key on the one position you will hear your lift pump priming your system, but if I bypass the relay and jump it the lift pump runs so I'm leading to that the ecu isn't grounding the relay on switched on.

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