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Will a bad FPR cause to run rich? Or do they ever go bad?

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Old 02-17-2009, 08:42 PM
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Will a bad FPR cause to run rich? Or do they ever go bad?
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Old 02-17-2009, 08:56 PM
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Default We had a Volvo 240 get towed in last week due to a faulty regulator, it would not even run.
I have replaced several stuck FPR's in Volvo 240's over the years for causing such a rich condition that they would not even start, but our cars, I do not know if they fail. The way to find out would be to check the fuel pressure. That is probably not much help, sorry :>/
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Old 02-17-2009, 08:58 PM
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Thanks Carl.
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Old 02-17-2009, 08:59 PM
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Default yes and yes
The FPR can certainly fail. In my old A4 my FPR would instantly flood my engine to the point where it would not start. I chased that bugger for 2 weeks trying to figure it out. If a stuck regulator can flood an engine to the point it won't start I can certainly believe it could cause you to run rich.
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Old 02-17-2009, 10:48 PM
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An air leak between MAF and turbo will cause you to run rich without boost leak symptom
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Old 02-18-2009, 05:50 AM
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Default True but I don't think I have a leak there..
Newer MAF hose and samcos from Turbo to intake.

I'm still searching for the cause of my 2341 cel when coasting..
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Old 02-18-2009, 08:20 AM
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Lean. Not rich. ;-)
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Old 02-18-2009, 10:42 AM
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Ah yes - you're right. After the Turbo would cause rich on throttle
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Old 02-18-2009, 10:42 AM
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How about after the turbo ? Down a pressure test recently ?
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