Question about 2002 Mercury Sable

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Cranks but wont start

Tried cap on fuel line and had pressure,also tried red button in was down,what else can I try

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So you think you have fuel-so all you need is spark,compression and timing-so pull a plug wire off the coil pack and use a test light to see if you have spark-ground clip to engine,hold probe over open hole where wire goes and have someone crank motor-there should be a strong blue spark- denny

Posted on Jan 02, 2014

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Posted on Jan 02, 2017

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SOURCE: Car suddenly won't start

This sounds strange to happen after a service is done on another area of the vehicle. I would look at damage done by the hoist mechanism.

The hoists have lifting arms which meet the frame of your car. You have wires for the O2 sensors which can hang low. The fuel lines follow the frame and possibly could be crushed.

Vibrations. Air wrenches make vibrations which theoretically could shatter delicate electronic components. If you have sediment in the tank, this is also a concern, Some Ford products use a tank filter which can disinegrate and clog the fuel pump.

Get a pressure reading from the test port of the fuel rail. It will tell you if the problem is there.

Posted on Mar 16, 2013

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SOURCE: 2002 mercury grand marquis 4.6l turns over but wont crank up

How about the injector? In the engine junction fuse box the fuse for the injector power is in there make sure its not open

Posted on Mar 07, 2012

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99 Tahoe engine cranks, wont start

You need 3 things.
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 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.
Later V6 and 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?
Post back what you have.

The other thing to that is common is the (ICM) under the distributor cap. There is a breather screen on the bottom of the distributor that get's clogged with dirt causing condensation promoting corrosion, this was gm TSB for replacing the cap and rotor to make sure it's clean.

Good luck and hope this helps. Merry Xmas.

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