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manfredschulz10

GT86 Engine Stalling After Fuel Filter Change

I've got a 2014 Toyota GT86 with a gasoline engine that's acting up. Check engine light comes on and off, sometimes it stalls at idle, and feels like it's lost power. I just changed the fuel filter, and I'm wondering if that's related. Could it be a bad fuel pressure regulator?

Summary of the thread

A 2014 Toyota GT86 experienced engine stalling and power loss after a fuel filter change, with the check engine light intermittently activating. The issue was suspected to be related to the fuel pressure regulator, as the symptoms aligned with a pressure drop following the filter replacement. After consulting a workshop, it was confirmed that the fuel pressure regulator was faulty, and replacing it resolved the problem.

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4 comment(s)

karllange91

Sounds plausible. A pressure drop after a fuel filter change often points to regulator issues. Have you checked the fuel rail pressure? A simple scan tool should give you a reading. Also, listen closely to the fuel pump; is it unusually noisy?

manfredschulz10 (community.author)

I don't have a way to check the fuel rail pressure myself. I listened to the fuel pump, and it sounds normal. Could a faulty fuel pump relay cause the same problems, or is the pressure regulator the more likely culprit since it started after the filter change?

karllange91

While a faulty relay is possible, the timing with your fuel filter change strongly suggests the regulator. The error entry likely confirms this. A proper diagnosis requires checking the fuel pressure; I'd recommend a workshop visit. It's probably just a bad regulator, but better safe than sorry when it comes to the fuel system.

manfredschulz10 (community.author)

Took your advice and brought it to a local workshop. You were right, the fuel pressure regulator was bad. Repair cost 45€. All fixed now. Thanks again!

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TOYOTA

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GT86