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Old 11-08-2013   #1
mallett
 
Join Date: Nov 2013
Location: bedford ohio
Posts: 1
Default miss fire cyclinder 1 and 4

check compression 175 dry 200 wet on 1 and 200 on 4 do I need to pull intake to ohm injectors and or coil spark plugs were replaced is there a way to ohm injectors I think injectors are bad because plugs are wet and cylinder compression jump up like it had been washed out from fuel with out pulling intake tried fuel leak down no pressure drop on injectors. fuel system was just flushed had bad fuel 300 miles ago ran fine. Having a hard time the car is a 1990 with 3000 miles I was only 15 when it was new so any help would be great.
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Old 11-08-2013   #2
mike100
 
Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,786
Default Re: miss fire cyclinder 1 and 4

at this point, if it is safe to do so (fuel exposure wise), you can take an extra spark plug on the end of the plug wire grounded somewhere safe and check for the presence of a good blue spark, weak yellow spark, or non-existent spark in the bad cylinder. Cylinders 1&4 are not on the same coil pack I don't believe.

These cars certainly have a reputation for bad injectors- you will likely need to work on those even if they are not the primary cause of the problem or had obviously been replaced before.
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Old 11-08-2013   #3
Kevin
 
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Join Date: Jun 2005
Location: pittsburgh
Posts: 4,624
Default Re: miss fire cyclinder 1 and 4

90 with 3000 miles? injectors need changed out.
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