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Old 11-18-2010, 07:04 PM   #11
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the fpr is the fuel pressure regulator and if so you mean the vacum connection also where is the maf sensor
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Old 11-18-2010, 07:10 PM   #12
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Yes, the vacuum line on the fuel pressure regulator. The MAF is on the throttle body, if you have a MAF, what year and model is your car?
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Old 11-18-2010, 07:26 PM   #13
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1990 i believe it does have one. i disconnected the fpr while running the fuel pressure went to 45 psi. i think the maf sensor is located at the end of the large black rubber air intake hose it is the silver flap that controls air flow to the engine am i correct.
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Old 11-18-2010, 07:35 PM   #14
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That pressure sounds about right. The MAF will be right by the throttle body. You can also check the EGR valve to make sure it'* not stuck open.
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Old 11-18-2010, 07:52 PM   #15
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to check the egr you disconnect and see if there is a change in way the engine runs.i can do this with the engine running?
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Old 11-18-2010, 07:57 PM   #16
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You can check the valve by using a 9v battery and touching the two outside terminals. You will hear the valve click.
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Old 11-21-2010, 03:00 PM   #17
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hey dan i did not have time to work on the car the last couple of days i changed what i believe is the maf sensor with the one from my 91 lesabre i cleaned the intake with carb cleaner also where the sensor mounts with the sensor out.same problem. i see a sensor at the bottom of the intake below the maf sensor what is that for.also you told me to check the egr with a 9 volt battery but i dont see 2 terminals on top the plug has 3 wires in it.
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Old 11-21-2010, 03:12 PM   #18
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One big question that I have that wasn't addressed, is the Service Engine Soon light on? Does it have starting issues only when cold, or does it have it all the time? Are you smelling the smell of unburned fuel when you are cranking on it? When it starts, does it stumble slowly to life, or does it just fire as if it just decided to start? How long has this been happening? Did it just start doing this, or has it been an issue growing worse and worse until it is now getting annoying?
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Old 11-21-2010, 03:39 PM   #19
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no service lights and they do work i put a reader on the car and showed no stored codes.this first happened about 3 weeks ago it may have gotten a little worse but not much.this seemed to happen all at once.when you try to start cold it puffs back and stumbles a little bit. after cranking a bit it stumbles longer then you give it gas and it may die or clear it self and run fine. you let the car run for a while and it runs great. shut the car down and restart no problem let the car sit and the problem starts all over.i dont smell unburned fuel during this.
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