2003 Mercury Sable ENGINE STALLING AFTER RESTARTING WITH EN

Tiny
BILL.KELLY
  • MEMBER
  • 2003 MERCURY SABLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 75,000 MILES
When running errands, I can make several stops but after engine is at operating temperature, if I turn the engine off for less than fifteen minutes, then re-start the car, it will stall after about a block. This has happened 8 times in the last 5 months. Engine temperature normal, and engine light does not come on until engine stops. Engine will restart after 15 minutes and run perfectly for weeks. The engine light stays on. Mechanic gets an Analyzer code 191 - engine gasoline pressure low. Mechanic put on pressure gauge and ran for 3 hours, but it did not stall. They did not turn the car off after it reached operating temp and try to restart it after 5 minutes as I had instructed. Not sure if restarting and letting it idle will cause it to stall. I have always RE-started it, put it in gear and driven about a block before it stalled. The car has an anti-theft system but the dealer says that would prevent the car from starting and would not stall the engine after going a block.
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Friday, October 30th, 2009 AT 4:45 PM

4 Replies

Tiny
SERVICE WRITER
  • EXPERT
IF they charged you and did not test drive during likely conditions if they were instructed to do so, then you have a good gripe.

On the shop's defense of strategy, not the charges if any, they are trying to nail down the problem in the most likley situation from their perspective of experience, facts and troubleshooting data. When you have an intermtitant problem that is as infrequent as yours, another strategy may be needed.


http://www.2carpros.com/forum/automotive_pictures/30961_0m_1.jpg



Process of elimination for what facts we have.

Low fuel or no fuel.
Have you done this? What the specification of low fuel is, I'm not sure. I'll see what I can find.

High pressure or low pressure can ONLY be determined by catching the problem with the fuel gauge on. You may need to buy a gauge (http://www.2carpros.com/store/index.php?main_page=product_info&cPath=10&products_id=16) and have them hook it up to the windshield or some way of viewing it while you drive it. Then you can tell if the pressure goes high or low. Just be sure to verify from a seller that it will work with your vehicle and that any adapters are included. If I had to put money down, I would be suspecting a pump that is losing pressure for that period of time.

The shop can check the resistance in the circuit.

The shop should have already looked at the sensor and evaluated it for damage and the harness as well...BE sure to ask them if they did. IF they didn't, have it looked at.


http://www.2carpros.com/forum/automotive_pictures/30961_0m_2.jpg

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Friday, October 30th, 2009 AT 7:05 PM
Tiny
BMRFIXIT
  • EXPERT
Switch gas stations and or go for a higher grade
check and replace fuel pressure regulator

((We had an 02 that did the same with the same code
it was the PCM needed to be updated

we had to reprogram the PCM to the latest calibration
at the dealer ))

mention that to you tech
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Friday, October 30th, 2009 AT 7:29 PM
Tiny
BILL.KELLY
  • MEMBER
BMRFIXIT stated replace fuel pressure regulator or reprogram PCM. What does PCM stand for?

I do not find the response from Service Writer Posted: Fri Oct 30, 2009 4:05 pm of any help.
Low or no Fuel? I stated that each time I was able to drive away after waiting 15 minutes.
Buy and install a fuel gauge to confirm what the code 191 already tells me. How does this pin point what to fix. Fuel pump failure is normally total and not intermittent over such a long period isn't it.
Circuit resistance? Would not be so infrequent and not only under these specific conditions?
Does that leave the sensor as the most likely problem. Is the sensor replaceable without accessing the fuel pump in the gas tank?
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Friday, October 30th, 2009 AT 11:07 PM
Tiny
SERVICE WRITER
  • EXPERT
Thanks for blasting me. That wasn't necessary to be so dramatic. I'm trying to work with you not against you.

Fuel pump failure can most certainly be over a period of time and intermitant. It may be weak giving fuel presure that is low but present. As opposed to a "no volume of fuel ", it can have a "low volume of fuel. Conversely the fuel pressure may be too high ( fuel pressure regulator)

I brought up the possible sources according to Mitchell One. Since this is intermittant and it is your problem you want help with, you need to decide which way to pick at it. I gave you ideas and my recommendation to catch it. Since this happens approximately once every 20 days, testing may not be so simple as one pinpoint test.

An PCM is a powertrain control module, AKA a computer.

The reprogramming of the computer with the latest and greatest software may certainly be the fix.

This fuel system system is a returnable system.


http://www.2carpros.com/forum/automotive_pictures/30961_0c_1.jpg


Therefore the FRP sensor is not in the tank.

BMRFIXIT stated to "Check" the regulator first, not replace it first.

I apologize for not providing any help in my first response.
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Saturday, October 31st, 2009 AT 5:17 AM

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