Injectors being turned off
Working on a S5 with all emission deletes performed. The car starts up everytime but after 5 seconds the engine light comes on and fuel pump is turned off and car dies. Only way i knew it was the fuel pump was when i jumped the fuel pump the car stayed on and running. So has anyone experienced this before and have any idea what could be the cause.
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I thought the fuel pump would shut off if the AFM does not provide a signal to the ECU. 5 seconds before cutoff rings a bell.
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Originally Posted by DC5Daniel
(Post 12370038)
I thought the fuel pump would shut off if the AFM does not provide a signal to the ECU. 5 seconds before cutoff rings a bell.
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Are you getting any codes?
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Originally Posted by Rotary Alkymist
(Post 12370041)
Are you getting any codes?
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When did this problem crop up? Out of the blue? Or after some fiddling?
There aren't too many things that cause fuel cut. |
My wife rebuilt the engine for this car. Threw in rebuilt engine and now this. "When fuel pump JUMPED" the car idles and everything. But as soon as i remove that jump it shuts down.
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Are the diagnostic wires actually connected to the ECU? Are you testing 12v at the single green connector with key ON?
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Originally Posted by Rotary Alkymist
(Post 12370047)
Are the diagnostic wires actually connected to the ECU? Are you testing 12v at the single green connector with key ON?
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Engine codes 12, 13, 18. Don't comprehend how any of those would effect the fuel pump. 2 of them are tps related but the tps is in spec. And car idles perfect when the fuel pump wire is jumped.
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If you're lucky your boost sensor and TPS are both unplugged.
Can you verify that they are plugged in? |
Originally Posted by Rotary Alkymist
(Post 12370060)
If you're lucky your boost sensor and TPS are both unplugged.
Can you verify that they are plugged in? |
Originally Posted by Rotary Alkymist
(Post 12370060)
If you're lucky your boost sensor and TPS are both unplugged.
Can you verify that they are plugged in? |
I think I understand that yes they're plugged in.
Check connections at the ECU. Check for continuity of associated wires from end to end. |
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