Concerning engine miss. I have a 1999 Marquis. I have heard the problem goes back to cylinder head design. Once the injectors are worn, the burn in the cylinder becomes less efficient, causing the miss. Just by chance one weekend, I unloaded all the junk out of my trunk,(less weight, less load on engine). Also had tire pressure at old school levels (32 psi). Brought pressure up to the 44psi shown on tire and guess what, miss has left. Next fill up, I'm going to 89 octane for the slower burn.
SOURCE: 1999 grand marqui, 4.6 lit. engin. what is the
Make: MERCURY
Model: GRAND MARQUIS
Year: 1999
Engine: V8 - 4.6L - FI - - GAS
Part Number: RS12YC
GAP : .054" (Original Equipment Manufacturer and/or Original Equipment Equivalent)
Hope this helps.
SOURCE: what kinf od an engine does a 1999 mercury grand
It's a 4.6 Ford Modular engine is Ford Motor Company's overhead camshaft (OHC) V8. 1998-2000 Ford Crown Victoria/Mercury Grand Marquis, 215 hp (160 kW) and 285 lb·ft (386 N·m) with dual exhaust option
SOURCE: 1999 mercury grand marquis check engine light on
You will need to have a OBD2 scan completed to find out the fault and code that activated the check engine light.If you haven't a OBD@ scan tool you might want to stop at a garage and have it scared they might charge you for that the cost varies from $25.00 and up.
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Same problem, really bad bucking problem. Thought there was a crack in manifold, so replaced manifold and spark plugs. Next on agenda is to replace coils.
I've had a 1995 and currently a 2000 Grand Marquis and both have had engine miss problems. I took the 1995 in to the dealership after I had changed plugs and wires and coils.They cleaned the sludge from the engine (that didn't fix the problem but did seem to give me more power)but it was still missing, until they found a bad wire. It ran fine for about a year and then the "miss" problem returned. My 2000 had miss problems last summer that went away and has now returned this winter.
runs good cold but skips when it warms up.Like a popcorn machine going up hill.
I have been told that my problem (similar in nature to that described above) would be remedied by replacing the intake manifold. Is this the only possible solution? It seems that this would be a costly procedure - I would obviously like a more financially 'friendly' option to attempt...
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