Question about 1994 Mercury Grand Marquis
Its sounding like it could have your timing off...either electrical, or internally. If all plugs have good spark, scratch electrical. Then you could be looking at a timing chain.
Posted on Oct 14, 2013
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Posted on Jan 02, 2017
Not saying this for sure, but I had the same problem, and i have a 1994 xr7 V6 3.8 L , and all u need to do is set the idle down manually because your computer could have seen that the injector was stuck open, and tried to turn up idle to keep up with the amount of fuel being pumped, worth a shot :P
Posted on Feb 21, 2009
SOURCE: "check engine light flashing"
The flashing check engine light is typical of a misfire issue. There are two things I would do to start with.
1. Take the vehicle to an auto parts store like Autozone and have them hook up their scan tool so that they can retrieve stored trouble codes. Even if the check engine light is not on, they should be able to retrieve recently stored codes.
2. Do a complete tune up. New plugs, new plug wires, new air filter, new fuel filter if it has not been done recently.
If the parts store pulls the codes and they cannot tell you what they mean, post them up here and I will see what I can dig up for you.
Posted on Jan 02, 2009
Start car and use a squirt bottle of water to wet the wires and coil, if you see it spark or run rough one or both are bad, repair the wires first as they are more common.
Posted on Aug 02, 2009
SOURCE: rough idle
Mercury had a recall on 3.0 duratech motors in 2000 and 2001. If you get a fuel smell at startup then you might have a bad lower intake gasket, it could cause a miss if seal is cracked. Article No. 01-4-3 you can get it on AllData.
Also, check the PC rubber L piece that runs from the PVC valve to under the throttle control - it could be busted.
Make sure ignition wires are not cracked. If you haven't tuned it up in over 30-40K consider doing that.
Posted on Sep 16, 2009
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