Mechanics

FUEL QUESTIONS

1999 Ford Contour

Engine Performance problem
1999 Ford Contour 4 cyl Front Wheel Drive Automatic 211000 miles

1999 Ford Contour Where is the fuel pressure regulator located at on the 2.0L 4 cylinder engine. It's supposed to be on the top by the throttle body but it's not. There is a sensor of some sort on the end of the fuel rail with a connector, fuel line and vacuum line attached to it but it doesn't look like the fuel pressure regulator that ford or any other manufacturer displays.
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Mdgardenhour
July 31, 2010.




HI there,

Thank you for the donation,

see pic for view of pressure regulator.


http://www.2carpros.com/forum/automotive_pictures/61395_W01331699623MTR_1.jpg



mark (mhpautos)

Mhpautos
Jul 31, 2010.
I have seen that picture many times. My haynes manual shows the same part as well as Motorcraft website. I know what the fuel pressure regulator is supposed to look like but it's not there! I guess what I'm trying to say is that there is no fuel pressure regulator located on the fuel rail or anywhere else on the engine. Is that possible with this particular vehicle? Did they make different fuel rails for the 2.0L engine in the 1999 Ford Contour?

Tiny
Mdgardenhour
Jul 31, 2010.
Hi there,

You have me stumped, the pressure regulator should be on the back of the fuel rail,


http://www.2carpros.com/forum/automotive_pictures/61395_Capture_66.jpg



This is from Mitchell 1 data base, now it isn't a dedicated LPG fuel car is it? silly question but it is still a petrol engine? if it is not there i just do not know why, there is no other place for it to be, is there any spot on the fuel rail to accept it? has it been removed and the port blanked off? that is about all i can think off.

mark (mhpautos)

Mhpautos
Jul 31, 2010.
That's what I thought too. Do you think someone could have previously replaced the fuel rail with one from a differnet model? But even then you would think that without a regulator there would be no way to reduce or increase fuel pressure through engine demand. I'm sure this would affect engine performance especially when the engine is under a loaded condition, for instance going up a hill. The engine starts and runs fine until it warms up and then when going up a slight incline or speeding up it sounds like it's running on 1 or 2 cylinders (figure of speech) until it stalls itself out. I pull over to the side of the road then turn off the key for a moment or two and then it starts right back up until I put a load on the engine again and then it's a vicous process all over again. Weird huh. The entire ignition system has been replaced so I ruled that out, as well as the fuel filter. To tell you the truth I can't even test the fuel pressure because there is no schrader valve on the fuel rail either. Every Ford I've owned in the recent past has had a test port. I'm stumped with this issue.

Tiny
Mdgardenhour
Aug 1, 2010.
I can only suggest that you get a mechanic to take a look and see what they think, as for a different fuel rail, I doubt that any other would work or fit for that matter, can you post a pic of where it should be? Does the rail look altered in any way, as you say the engine will run with the reg out of the loop but demand will be an issue, this is very strange indeed, I would really like to view this, but that is out of the question.

Mark (mhpautos)

Mhpautos
Aug 1, 2010.
In your first post you wrote. There is a sensor of some sort on the end of the fuel rail with a connector, fuel line and vacuum line attached.

This is sounding like a pressure regulator to me, can you take a pic of it and post it so I can see it?

Mark (mhpautos)
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Mhpautos
Aug 1, 2010.
Here are the pics you requested. The part in question is on the right end (passenger side) of the fuel rail. You'll also notice form the other picture from the top of the engine that where the FPR should be there is none. I really think someone at some point replaced this fuel rail with a different model. Even the fuel line coming in is at the wrong location. Let me know if the pics are viewable. Thanks for your help!


http://www.2carpros.com/forum/automotive_pictures/556769_Reagan_529_1.jpg



http://www.2carpros.com/forum/automotive_pictures/556769_Reagan_531_1.jpg



http://www.2carpros.com/forum/automotive_pictures/556769_Reagan_530_1.jpg



http://www.2carpros.com/forum/automotive_pictures/556769_Reagan_532_1.jpg


Tiny
Mdgardenhour
Aug 1, 2010.
Well I am at a loss here, as I am in Australia I don't have the advantage of being able to look at one of these set up as it should be, so I have posted this on the mods board so others that may be more familiar with the car can give an opinion.

Mark (mhpautos)

Mhpautos
Aug 1, 2010.
Electronic returnless fuel system does not use a fuel pressure regulator. Electronic returnless fuel system uses a Fuel Rail Pressure (FRP) sensor to sense fuel pressure. FRP sensor is located in fuel supply manifold assembly. FRP sensor input signal is used by the PCM to vary the duty cycle output to the Fuel Pump Driver Module (FPDM) to compensate for varying loads. FPDM then modulates voltage to fuel pump to achieve proper fuel pressure. Engine Fuel Temperature (EFT) sensor input signal is also used by PCM to vary fuel pressure to avoid fuel system vaporization.

Arrowed is the FRP


http://www.2carpros.com/forum/automotive_pictures/266999_contour_1.jpg



Hope this helps


http://www.2carpros.com/forum/automotive_pictures/266999_AAA2_1184.png


Dave H
Aug 1, 2010.
Thanks Dave for explaining that for me. I wish they would show or explain that in the manuals but they do not mention this in any of the manuals I've read. Do you think this could be the culprit with my fuel issue? Also Where should I hook up my fuel pressure tester to even check fuel pressure? I really think it's a fuel starvation issue and not an ignition problem. If I could hook up the tester I could certainly narrow it down quicker than the route I'm going now, which is basically the guessing game.

Tiny
Mdgardenhour
Aug 1, 2010.

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