Injector Pressure Regulator ?????? Help
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New User
Joined: Oct 2006
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From: Perrysburg Township, Ohio
Injector Pressure Regulator ?????? Help
Ok my fuel mileage is horrible I am wondering if the Injector pressure Regulator may cause a dramatic drop in fuel mileage Im sure it seems like that may be my problem.
I unpluged the sensor and it seems like the truck runs a little smoother and seems much better. but of course the engine light is luminated
I hope you guys can give me some input on this assumption because if it is that sensor its like $260
I unpluged the sensor and it seems like the truck runs a little smoother and seems much better. but of course the engine light is luminated
I hope you guys can give me some input on this assumption because if it is that sensor its like $260
Thread Starter
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New User
Joined: Oct 2006
Posts: 8
Likes: 0
From: Perrysburg Township, Ohio
Accually the ICP sensory on the drivers side fuel rail
Sorry what a dummy I accually mean the ICP sensor which i beleive regulates the fuel pressure I think that is causing my fuel mileage to drop
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
The only way to find out for sure is to monitor the ICP pressure from a program like Autoenginuity. You can see the ICP voltage, pressure, and duty cycle.
Also the ICP doesn't sit in the fuel rail, it sits in the high pressure oil rail. The injectors are hydraulic/electric, meaning they need oil pressure and an electrical signal to fire. The fuel pressure is regulated right in front of the fuel bowl, where the fuel line connects into your filter bowl.
Also, are you sure you think it's the ICP sensor? The reason is that rough running and poor economy can be a number of easier and more common issues. Anything from the lenght of your last oil change, fuel filter condition, fuel quality, winter blended fuel, etc can all contribute or be a cause of a decrease in mileage and a change in engine tone.
Also the ICP doesn't sit in the fuel rail, it sits in the high pressure oil rail. The injectors are hydraulic/electric, meaning they need oil pressure and an electrical signal to fire. The fuel pressure is regulated right in front of the fuel bowl, where the fuel line connects into your filter bowl.
Also, are you sure you think it's the ICP sensor? The reason is that rough running and poor economy can be a number of easier and more common issues. Anything from the lenght of your last oil change, fuel filter condition, fuel quality, winter blended fuel, etc can all contribute or be a cause of a decrease in mileage and a change in engine tone.
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
I found it here for less than $55.
http://cgi.ebay.com/ebaymotors/FORD-...spagenameZWDVW
If the truck is running rough and sputtering, and you unplug the sensor, and it runs better, then you most likely have a bad ICP sensor. Unplugging it puts the engine in "limp mode" which has stored preset ICP based on the RPM. It's not as accurate as real-time ICP, however it keeps the engine running and can help diagnose problems. If you think it may be the problem $55 may be an easy band-aid for you. However, i don't think that alone will hurt fuel mileage as bad as you say. I'm saying something like a partially-clogged fuel filter or something like that.
http://cgi.ebay.com/ebaymotors/FORD-...spagenameZWDVW
If the truck is running rough and sputtering, and you unplug the sensor, and it runs better, then you most likely have a bad ICP sensor. Unplugging it puts the engine in "limp mode" which has stored preset ICP based on the RPM. It's not as accurate as real-time ICP, however it keeps the engine running and can help diagnose problems. If you think it may be the problem $55 may be an easy band-aid for you. However, i don't think that alone will hurt fuel mileage as bad as you say. I'm saying something like a partially-clogged fuel filter or something like that.
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
With the ICP unplugged the PCM commands an IPR Duty Cycle that should provide 750psi ICP. This is above where our trucks normally idle 500-600psi which is why the truck seems to idle smoother. It does not nesseccarily mean the ICP sensor is bad though. Whithout a code pointing to the ICP and/or a mechanical gauge showing an ICP discrepancy i would not replace the ICP sensor as a diagnostic method. If you have no codes check everything Pocket suggested first
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by HulkMJW
I unpluged the sensor and it seems like the truck runs a little smoother and seems much better. but of course the engine light is luminated
