Code 41 Troubles
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Code 41 Troubles
1990 f150 XLT 4.9L I-6
So I've gotten rid of all other codes except for 41 (O2 sensor). I just forked over the $40 finally for a fuel pressure tester and here is the data:
KOEO 49-50 PSI
IDLE 47-48 PSI
WOT 55 PSI
Vaccuum hose removed from FPR 59-60 PSI
The Haynes manual says that the 4.9L I-6 should be between 50 and 60 PSI at IDLE. So now that I know this is the cause of the code 41, I would like to know the root of the problem. I have dual tanks. The test was only done on the rear tank but the truck will run on both the front one is just leaking. Should I get a new fuel pump? New FPR?
And another thing is there a fuel pump in each tank and a third up front by the engine or is there only two pumps, one in each tank?
I check back frequently so if you have any ?'s just ask and I'll probably get back to you within an hour 8\9\08
So I've gotten rid of all other codes except for 41 (O2 sensor). I just forked over the $40 finally for a fuel pressure tester and here is the data:
KOEO 49-50 PSI
IDLE 47-48 PSI
WOT 55 PSI
Vaccuum hose removed from FPR 59-60 PSI
The Haynes manual says that the 4.9L I-6 should be between 50 and 60 PSI at IDLE. So now that I know this is the cause of the code 41, I would like to know the root of the problem. I have dual tanks. The test was only done on the rear tank but the truck will run on both the front one is just leaking. Should I get a new fuel pump? New FPR?
And another thing is there a fuel pump in each tank and a third up front by the engine or is there only two pumps, one in each tank?
I check back frequently so if you have any ?'s just ask and I'll probably get back to you within an hour 8\9\08
