Question about 1986 Lincoln Town Car

1 Answer

WONT START AND PAST IDLE

1986 TOWNCAR LEMO, KEY ON ELE FUEL PUMP RAN CONTAINLY,NEW FUEL PUMP,HOLDS 40 LBS PRESSURE,IF STARTS,IDLE ROUGH,NO POWER PAST IDLE,NEW PLUGS,WHEN ENGINE DIES ACTS LIKE NO FUEL ORPOWER,JUST QUITS

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  • YOUNGSUGARBE Nov 07, 2008

    ON THE 1986 ,THE VFUEL PUMP WILL NOT PUMP ANY PRESSURE NOW,DOES THIS RELLATE TO MY PROBLEM

  • Anonymous Mar 16, 2014

    It was driving then started to Idle rough and then died and will not start.

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Have a ford garage check out the fuel pump don't do it yourself if you do it will be so messed up they can't even fix it trust me i did i had to scrap the car

Posted on Mar 21, 2009

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Will not start only backfires and start dieseling.5.7 automatic. hear fuel pump running. ran fine last trip and parked overnight. few times in past week or two. little trouble starting. rough idle for few...


You need 3 things.
Compression
Good hot blue spark to all plugs.
Good gasoline and proper fuel pressure. 63-64 lbs.
If you have all 3 then move on to injector pulse to all injectors.
I think each injector is on a separate driver on that one.
Check for pulse to all of them.

You may be weak on fuel pressure . Even a couple of lbs low on a cold start will cause a no start. Double check cold start cranking fuel pressure. If under 63-62 lbs you have problems.one test is to give it a squirt of carb cleaner not starting fluid. If you get a intake or engine full of starting fluid it can blow things. Carb cleaner will start it if it is a fuel problem and lot safer. Also in the good old days when i was a kid, i used to get a couple of cans of starting fluid and get in the back and have a good starting fluid spraying contest. Good for a big blast if someone lights a match. If it starts then you have a fuel pressure problem. Run the full fuel pressure test and post back pressures.

Here is the guide lines on testing.
Hard to start cold.
Check cold start fuel pressure.
Check engine running fuel pressure.
Check engine running on the road fuel pressure.
Then shut it off and watch for fast leak down.
Pinch off at rubber part or block off return line and check full pressure.
V8 gm engines should have 60-66 fuel pressure.
Cold start should be 64-65 lbs of pressure.
If you do not have full fuel pressure on a cold start the injectors will not squirt fuel. Do not leave home without it.
Engine running should be 60-66 lbs pressure depending on engine load.
Full pressure with return pinched off should be 75-85 or more.
And if it has a fast leak down after shut off you have a leak.


The 75-85 is only a check on the capable full pressure of fuel pump.
If you can not find the rubber return line check full pressure by plugging return line or just or the true full pressure can be taken direct at the end fuel filter.
What are the pressure readings that you have done.
What are your cold start pressure readings?



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It could be your fuel pressure regulator, check this link for details:

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528022b9c4

8e44b4b.jpg That's what it looks like.

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