big problem
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big problem
i have a 1999 f250 super duty v-10 engine. when i first start my truck it runs fine, after driving it for 15 min or so it has no acceleration and engine will not rev past about 2800 rpms. i put my truck in n and turn it off and back on and its fine for 5 min or so then same thing over. No Codes. Please help
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From: USA
does it buck or sputter?
You chkd for codes with a scanner? and you verified the chk eng light is working when you first start the vehicle?
If you shift to neutral will it rev above 2800?
Clogged cat ,bad fuel pump,faulty cylinder head temp sensor
is it overheating?
when you drive the first 5 min. does the tranny shift correctly?
Rich
You chkd for codes with a scanner? and you verified the chk eng light is working when you first start the vehicle?
If you shift to neutral will it rev above 2800?
Clogged cat ,bad fuel pump,faulty cylinder head temp sensor
is it overheating?
when you drive the first 5 min. does the tranny shift correctly?
Rich
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no sputter or bucking. engine light works. it will not rev past 2800 in p or n, but when i shut it down it will rev all the way up for bout 5 min. then problem starts all over. when i first start the truck and drive tranny seems to run strong.
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it finally threw a code P0171 System too lean bank 1, that is the only code that came out. the other problem is still there. PLEASE HELP!!!
Last edited by scorpiox31; Sep 11, 2006 at 05:38 PM. Reason: adding line
Post Fiend
Joined: May 2006
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From: Central Florida
The fuel pump may just be getting hot after five minutes of running and then not pushing it's full pressure. I think a fuel pump or at least a fuel pressure guage would be the place to start.
I know it's a wives tail, but they work sometimes. Is your tank full? A fuel pump uses the fuel it's sitting as a coolant and lubricant. I wouldn't advise filling it up, sense you will have to drop the tank to replace the pump.
I know it's a wives tail, but they work sometimes. Is your tank full? A fuel pump uses the fuel it's sitting as a coolant and lubricant. I wouldn't advise filling it up, sense you will have to drop the tank to replace the pump.
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Originally Posted by PHWLEE
Might be a long shot, but maybe the fuel filter could be clogged up??
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has new fuel pump and filter any other ideas. it runs well just wont rev past 2800 rpms, then i shut the truck down and start it right back up and then will rev all the way up for about 5 min. threw a p0171 code, system too lean (bank 1)
Post Fiend
Joined: Jan 2002
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From: USA
When was the fuel pump and filter put in?
What kind of smoke do you get from tail pipe when this happens ?
Does the truck idle smooth ?
no miss or rough idle?
Have you looked at the Maf sensor ?
I'm thinking a clogged cat or muffler
as I said before
Rich
What kind of smoke do you get from tail pipe when this happens ?
Does the truck idle smooth ?
no miss or rough idle?
Have you looked at the Maf sensor ?
I'm thinking a clogged cat or muffler
as I said before
Rich
Post Fiend
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From: Central Florida
Have you checked your fuel pressure and bleed down? I still think it is a fuel issue, possibly clogged injectors or bad fuel pressure regulator. It could possibly be a very dirty MAF not metering the correct amount of air at those RPMs and the computer not giving enough fuel.
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doesnt smoke. has new maf. replaced fuel pump 3 months ago. fuel pressure is at 41 psi. could it be the computer?? truck idles smooth
Last edited by scorpiox31; Sep 12, 2006 at 10:55 PM. Reason: forgot something
