Miss Fire
07-30-2011, 06:44 PM
#1
Thread Starter
Join Date: Jul 2011
Location: Canada
Posts: 5
Miss Fire
Working on a 1995 3.8 with a miss fire on #3 cyl. I replace the plugs, wires, coils, and fuel filter and its still there its actuauly missing on #5 and #2 and #4 cyl. also but goes away at higher rpm's but I'm sure #3 keeps missing I can feel it but it doesnt show it is on the scanner. I've read somewhere that a bad alt. can cause this has anyone else heard that. The battery let just came one but its still charging good. This is begining to **** me off.
07-30-2011, 07:07 PM
#2
Thread Starter
Join Date: Jul 2011
Location: Canada
Posts: 5
Working on a 1995 3.8 with a miss fire on #3 cyl. I replace the plugs, wires, coils, and fuel filter and its still there its actuauly missing on #5 and #2 and #4 cyl. also but goes away at higher rpm's but I'm sure #3 keeps missing I can feel it but it doesnt show it is on the scanner. I've read somewhere that a bad alt. can cause this has anyone else heard that. The battery light just came on but its still charging good. This is begining to **** me off.
07-31-2011, 04:51 AM
#4
4th Gear Member
Join Date: Nov 2006
Location: CA
Posts: 1,670
What are the actual codes you are getting? If the code is for cyl 3, why do you suspect 2, 4 & 5 are misfiring?
A bad alternator can cause issues like this (multiple cyl misfires). A loose or corroded connection in the ignition system can also cause your problem (e.g. battery terminals, alternator connections, spark plug wire connections etc). Most auto-parts stores will test an alternator and battery for free (call ahead first, of course).
Good luck...
A bad alternator can cause issues like this (multiple cyl misfires). A loose or corroded connection in the ignition system can also cause your problem (e.g. battery terminals, alternator connections, spark plug wire connections etc). Most auto-parts stores will test an alternator and battery for free (call ahead first, of course).
Good luck...
07-31-2011, 06:44 AM
#5
Thread Starter
Join Date: Jul 2011
Location: Canada
Posts: 5
What are the actual codes you are getting? If the code is for cyl 3, why do you suspect 2, 4 & 5 are misfiring?
A bad alternator can cause issues like this (multiple cyl misfires). A loose or corroded connection in the ignition system can also cause your problem (e.g. battery terminals, alternator connections, spark plug wire connections etc). Most auto-parts stores will test an alternator and battery for free (call ahead first, of course).
Good luck...
A bad alternator can cause issues like this (multiple cyl misfires). A loose or corroded connection in the ignition system can also cause your problem (e.g. battery terminals, alternator connections, spark plug wire connections etc). Most auto-parts stores will test an alternator and battery for free (call ahead first, of course).
Good luck...
07-31-2011, 10:36 PM
#6
4th Gear Member
Join Date: Nov 2006
Location: CA
Posts: 1,670
08-01-2011, 10:25 AM
#8
2nd Gear Member
Join Date: Dec 2010
Location: Virginia
Posts: 497
I guess you have already swapped plugs with #3 to see if it follows it. What manufactorer ignition coil did you purchase? No changes at all with new ign parts before and after the problem noticed?
The battery light comming on is something to pay attention to. You can follow the voltage with a multimeter from alt to battery ect.. and look for a drop.
The battery light comming on is something to pay attention to. You can follow the voltage with a multimeter from alt to battery ect.. and look for a drop.
08-04-2011, 12:18 AM
#9
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Join Date: Nov 2006
Location: CA
Posts: 1,670
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