Question about 1998 Oldsmobile Cutlass

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Where is my fuel pressure regulator at?

Im trying to find out where the fuel pressure regulator is in my 98 olds cutlass. replaced the fuel pump, bled the gas line and car wont stay running. my neighbor thinks it might have something to do with a defective antitheft system. help!

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Its located on the fuel rail assembly, under the hood near the throttle body.

Posted on Jun 21, 2009


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I have only 35 to 39 psi gas pressure reading what can cause this. I have replaced the filter plug wires coil packs. when stepping on gas pedal there is alot of hessation

Hey Mike, I know this is hair pulling..You need to replace the fuel pump filter/strainer.. and maybe the fuel pump..the fuel pump determines how much pressure goes through the entire system ... BUT FIRST.. determine (if you can) where the metal flakes came from..(debris is probably from a gas station.. over the years.. I learned NOT to get gas right after heavy rains - guess why?) ,,do you still have the old fuel filter?? carefully cut it open and see whats inside.. (unroll the pleats) if you see a lot of metal flakes like in the tank,, you know they were caught..

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Has to be fuel related
Are you sure the fuel pump is working properly? Do you have a pinched or plugged fuel line>
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Jun 09, 2014 | 1994 Oldsmobile Cutlass Ciera

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Fuel pressure regulator

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Apr 28, 2013 | 1994 Oldsmobile Cutlass Ciera

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diesel engines high pressure pumps not suppose run dry.diesel fuel keep high pressure pump cool and lubricated.problem could be fuel pressure regulator in the fuel filter water separator housing.replace fuel filter see if it helps problem could be fuel pressure regulator in fuel filter housing, the fuel pressure regulator has a air bleed orifice that allows vent to the fuel tank.make sure fuel pump fuse okay pump getting power. i would let garage or dealership check it out if all fails because your diesel engine fuel timing is pcm controlled if let fuel system go dry you probably have to have fuel injection timing reset or could have damage high pressure pump letting it run dry i hope thats not the case because high pressure pump not cheap part i hope it not that.

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Problems with the fuel pressure system on 98 mercury sable

I'm not sure what this guy has done and not saying anything bad about him. I just want to help and explain a litle about your fuel system. As far as the gas lines blowing, You have metal and rubber hoses and am guessing the rubber hoses are the ones that had a problem. The only reason the metal ones would go is rust or something hittting them and knocking a hole in them. Ruber hoses can get rotten and get a leak. Below are some pictures of the underside of the fuel tank and as you can see many of those lines are mounted and if some of those mounts were not disconnected is could have pulled on one of the rubber lines and ripped it. I'm guessing that's what happened and he may have just said they blew. Will get to a blown line in a second. By the way I have been working on cars for over 25 years and have forgotten to disconnect things and ripped lines happens. Now fuel lines "blowing", in my years of working on vehicles I have hardly come across this unless the car sat for a long time and the fuel system was clogged up but even in those cases they were old and rotten. The fuel pump should only constantly run when turning the engine over or while it is running. If the system were that clogged it wouldn't run there for no extra pressure would really build up. When you turn the key to just the on position the fuel relay turns on for a few seconds and then automatically shuts off. Therefore your not just building and building pressure. Now the fuel regulator is done by vacuum. If it were bad you would have less pressure. They do not clog and cause a build up of fuel pressure and if they did, there is a diaphram inside the regulator that would blow and develope a leak (vacuum wise) and again no or little pressure not more. Below is also a picture of the fuel regulator and on top of it you can see where the vacuum line attaches. I hope I was able to help you understand a bit and just didn't confuse you more. Hope this helps...




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I have attached a general video link demonstrating the method of changing the "Fuel Pressure Regulator".please download or watch the video to know how to locate the regulator and how to replace it.Hope your problem is solved.Please rate my solution as helpful.Have a great day.

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Very easy if you have the new one just look at how it is mounted, most times just a couple of retainning screws and it comes right out, bleed the fuel system of pressure before you take it out or put a rag over it, there will be about 40 PSI in the fuel rail.

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1991 Olds cutlass Cala 4cyl 151 5 speed

sounds sort of like a map sensor or the heating and cooling sensor. Both help regulate the fuel. also need to check to see if the thermastat is stuck to open. If the hot and cold sensor is giving a false reading of hot to the computer this can cause the car not to pump fuel. If the sensor is bad also replace the therm as well.

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