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  #1  
Old 08-16-2017, 05:35 PM
leinadmit leinadmit is offline
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Default 2002 ford ranger 3.0 misfire with a p0301 code

Cylinder 1 misfire : I changed the plugs then swapped wires 1 & 2 still no change , checked for spark at cylinder 1 it is good. Checked the injector whip with noid light shows good ,put a screwdriver to the injector can hear the injector clicking just like the rest. Where to go from here???
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Old 08-28-2017, 11:12 PM
GSF1200S GSF1200S is offline
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Default Re: 2002 ford ranger 3.0 misfire with a p0301 code

Quote:
Originally Posted by leinadmit View Post
Cylinder 1 misfire : I changed the plugs then swapped wires 1 & 2 still no change , checked for spark at cylinder 1 it is good. Checked the injector whip with noid light shows good ,put a screwdriver to the injector can hear the injector clicking just like the rest. Where to go from here???
Check compression in cylinder 1 and compare it to at least 2 other cylinders. While testing spark is fairly reliable, you cannot guarantee the injector is spraying fuel- it could be clogged. I would rent a compression tester and check cylinder 1 for proper compression and if that passes go I would replace the injector on that cylinder.

Also, how did you test for spark on cylinder 1? If an inductive timing light or similar, fine. If you popped the wire and checked for arc to ground, you only test the wire and coil- plug could be fouled or shot. Replacing the plug in that cylinder when you do the compression test is a cheap way to be sure.

Edit: I see you changed the plugs. Youre prolly fine on spark, but you could replace cylinder 1s plug again in case you got a bad one.
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Last edited by GSF1200S; 08-28-2017 at 11:14 PM.
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Old 08-29-2017, 06:56 PM
leinadmit leinadmit is offline
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Default Re: 2002 ford ranger 3.0 misfire with a p0301 code

Issue solved removed coil pack turned over and found cracks in the sealant
Thanks for your input GSF1200s
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  #4  
Old 09-01-2017, 11:45 AM
modelageek modelageek is offline
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Default Re: 2002 ford ranger 3.0 misfire with a p0301 code

Quote:
Originally Posted by leinadmit View Post
Issue solved removed coil pack turned over and found cracks in the sealant
Thanks for your input GSF1200s
Strange that you did not get a p0305 also. Hmmmm.

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