Question about 2004 Mercury Mountaineer
I changed the coil, alternater, spark plugs, and spar plug wires and now it back firing
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Posted on Jan 02, 2017
SOURCE: not firing right on no.4
First check plug and make sure the right plug for this vehicle,make sure that the heat rating for this plug is correct. Your problem could be a wrong heat rating plug been installed. Also make sure that the misfire is due to a bad plug and NOT a bad injector or injector wiring or uneven compression or even bad coil. Check injector wiring and make sure it not shorting or broken. To check injector pulse use a NOID light can be bought at almost any auto parts store like Auto-zone etc. Also compression can be checked with compression guage. A rule of thumb to go by is if any cylinder has more than 10 PSI in difference in compression there is a problem like a burnt valv etc. Here is a n example cyl# 1 170psi cyl#2 176 psi cyl#172psi cyl# 4 150 psi, there is a problem with cylinder # 4 and will cause a miss from cylinder #4. Good luck and thank for using FIX YA
Posted on Mar 26, 2009
SOURCE: car wont stay running
first off i would take compression test and go from there.
that should tell you if valve timing is the problem i am not sure .....but are fords still 1,2,3 mabee4 all on drivers side?
Posted on Dec 19, 2009
So you want to tune it up , but someone has to tell you it has no wires? Have you looked at the engine at all? why do you want to do a tune up? The coils are very problem prone, and you need to use care in replacing the spark plugs, use only Auto-lite or Motorcraft platinum spark plugs, and use a silicone grease in the boots. After you remove the coil, blow compressed air down the tube an dblow out any dirt, before removing the spark plug. Wires are/were never an item for a tune up, unless they were bad. Replace the fuel filter.
Posted on Mar 13, 2010
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