Question about 1993 Mercury Grand Marquis

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Stalling engine, running rough,

Complete tune-up done, computer replaced for non coding(still doesn't code?) New gas tank, cleaning and engine still stalls and runs rough frequently but not always. My mechanic has had this car for several weeks and still cannot figure it out. Now what?

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Posted on Jan 02, 2017

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SOURCE: rough idle stalls

blown headgasket

Posted on Oct 15, 2008

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  • 1 Answer

SOURCE: engine stalls ,hard to startrun rough

Service Engine light came on and stays on and this is on my 1995 Grand Marquis LS 4.6 litre Engine. It is now idling a little rough

Posted on Oct 19, 2009

  • 13 Answers

SOURCE: car runs very rough to the point of stalling out

try new coil pack

Posted on Jan 11, 2010

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98 dodge ram 1500 5.9L 2wd. Truck runs really rough, stalls, then won't start. No check engine light now. Had misfire codes, did tune up, now it still stalls and no check engine light.


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I have a 2001 suzuki xl7, I replaced egr unit and installed new pvc valve. Still shows error code P0400. Why won't it pass deq?


You may have a EGR valve plugged exhaust gas passage, so when it is opened the systems computer doesn't see any change in the O2 signal voltage. To check this manually pull open the EGR valve, the engine should run very rough and will stall out most times, if you open the valve up and see no change in the engine idle the passages are plugged with carbon and must be cleaned. As long as you have this EGR problem the car will not pass smog.

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Driving 60mph power drops as though out of gas. Coast 2-300 yds pump gas pedal van back to normal. Now at home it starts then stalls, will only run 5-10 seconds. New plugs&wires distributor cap and...


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1 Answer

Engine running rough


It sounds like maybe yu have a fuel filter that getting plugged up.
To check this, see if you can remove it from the engine, then very carefully blow thru it in the direction the fuel travels, if clean you should be able to blow thru it easily, if not then replace.
The P132 is (E132) .................. Knock Sensor Circuitry Failure .... The knock sensor is what prevent engine ping from low octane. ...
It could also be you just got some bad gas.
You also might try topping off the tank with gas from another place and bring the octane level up if that is the problem.
Hope this helps
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May 20, 2009 | 2003 Dodge Ram Maxi

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Stalls after getting gas then starts fine. Also noticed it idles rough at other times. No trouble codes. Any thoughts?


When it stalls after getting gas, are you filling the tank up beyond the first stop? I was filling mine up after the pump shuts itself off in order to top it off as much as possible. I learned this can plug some type of purge vent or something like that. I stopped topping it off and haven't had a problem since. Mine would hesitate and then die at the first couple stop lights after getting gas. From what I've read, the cheap fix is not to fill it up past the stop point, but the permanent fix is to replace the gas tank since the vent physically part of the tank.

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1 Answer

Engine running rough, hard starting


Try cleaning the EGR, there common to carbon build up on the 95 JImmy's.

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