Fuel rail codes

KOHLLINK

MEMBER
2005 FORD E-SERIES VAN
115,000 MILES

Van running rough and stalling at red lights check engine light on. Checked codes they were fuel rail codes. Changed fuel filter (it was
nasty)put 10 gallons in tank and added sea foam. Ran it on the highway 40 miles and still running rough when coming to stops. Could it be clogged fuel regulator? Injectors dirty? I think I got some bad gas.

7 Replies

KHLOW2008

MECHANIC
41,815 POSTS

What trouble codes are you getting?

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Sunday, March 18th, 2012 AT 6:43 PM

KOHLLINK

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I went to the advanced auto to get scanned. The desk person told me all the codes were fuel rail. I can bring it back there tomorrow and get the code numbers.

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Sunday, March 18th, 2012 AT 8:55 PM

KHLOW2008

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I would need the trouble code to understand what is wrong.

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Monday, March 19th, 2012 AT 12:38 PM

KOHLLINK

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I got them PO191 and PO308

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Monday, March 19th, 2012 AT 4:08 PM

KHLOW2008

MECHANIC
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P0191 is the Fuel rail pressure sensor circuit performance.

Possible causes are :
1. High fuel pressure.
2. Low fuel pressure.
3. Faulty FRP sensor.
4. Excessive resistance in the circuit.
5. Vacuum leaks.
6. Low or no fuel.

There are quite a number of cases whereby the problem is resolved by replacing the fuel pump. Before doing that, test the fuel pressure, at idle, under full acceleration and highway driving. If the pressure is not consistent, quite lilely you have a faulty fuel pump. You mentioned replacing the fuel filter, I understand some models have a double filter, were both replaced?

Recheck the filter to see if it is dirty, hope it is not caused by too much dirt in the fuel tank.

P0308 is a misfiring with cylinder # 8. If it is only this particular cylinder that is misfiring, you would need to check the ignition coil, fuel injector and spark plug.