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04-03-2020, 10:26 AM | #1 |
Scooby Newbie
Member#: 478520
Join Date: Nov 2017
Chapter/Region:
International
Vehicle:2005 WRX Platinum silver metallic |
Injector spraying while priming pump
took off intake manifold to do Tgv deletes turbo inlet and evap delete.
Now one (maybe both)of the passenger side injectors now spray while priming the fuel pump. Literally raw fuel coming out of exhaust. However engine idled very good no miss and AFR was pretty spot on until you reved it a bit. So that sound I’m hearing is that an open injector or a sound coming from the now open evap line in the engine bay? Also the sound can only be heard for the duration of the pump priming. could the Tgv deletes make that much extra fuel come out the exhaust without a tune. Before I did the Tgv deletes and evap delete I was on base tune 3k rev limit could only cruise and idle, once I get this figured out I’ll be getting a etune.
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04-03-2020, 01:19 PM | #2 |
Scooby Newbie
Member#: 27525
Join Date: Oct 2002
Chapter/Region:
SCIC
Location: Orange County
Vehicle:03 wrx wagon yellow |
Injectors dont fire if you only prime the pump. Your car idles okay it's likely not a stuck injector. Likely squished or old orings, either way you're gonna have to pull everything out and inspect. Might as well backflush clean the injectors while they're out. A tiny bit of silicone lube on the orings keeps them from getting snagged when reinstalling. New orings make a nice pop sound when they get pushed in.
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04-03-2020, 11:03 PM | #3 | |
Scooby Newbie
Member#: 478520
Join Date: Nov 2017
Chapter/Region:
International
Vehicle:2005 WRX Platinum silver metallic |
Quote:
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04-04-2020, 02:55 PM | #4 |
Scooby Newbie
Member#: 27525
Join Date: Oct 2002
Chapter/Region:
SCIC
Location: Orange County
Vehicle:03 wrx wagon yellow |
Hrm, maybe not orings if they were top feed then. Forgot which year wrxs had those.
Mine were side feeds from early sti, I've had an oring get squished on install and got pinched. The car started and idled fine but had a strong fuel smell out the exhaust so that's why I thought it was orings. |
04-04-2020, 06:51 PM | #5 | |
Scooby Newbie
Member#: 478520
Join Date: Nov 2017
Chapter/Region:
International
Vehicle:2005 WRX Platinum silver metallic |
Quote:
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04-05-2020, 04:44 PM | #6 |
Scooby Newbie
Member#: 478520
Join Date: Nov 2017
Chapter/Region:
International
Vehicle:2005 WRX Platinum silver metallic |
Finally got to replacing the injectors. One injector I took out had a damage on the cap so I though that was it for sure. Got new injectors in both plugged in. Get the same sound. Unplug both injectors get same sound, so now I know it’s not wiring or the injectors so I have no idea maybe fuel pressure regulator but only sounds like it’s the passenger side
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