3.7l horrible idle

[rdeeter]

I stopped to put gas in the jeep then after starting it ran horribly! Codes were misfire on #1,#2,#5 and o2 sensor cat converters. Changed plugs and coil packs on all only code after was o2 and cat converters. Changed o2 sensor no light on but still runs horribly doesn't want to idle and is still missing checked all plugs and #6,#5 not firing got spark on both but clean plug on 6 and wet on 5 with fuel can the converters cause this ran great one minute then bad the next. Have had converter codes for months help please

 

[LibertyTC]

What year & How many miles on the Jeep? Ya a blocked cat=not good.
Engine compression test is now needed.
PCV filter new?
Did you use Mopar coil packs? What brand of 02 sensor did you use?
Did you do a fuel rail pressure test, if so what was the psi readings?

 

[Conundrum2006]

Ouch. Is there a possibility of bad fuel?

Like libertyTC was saying you sort of got to start with the basics.
I'm curious about what year it is because the coil packs change design which could explain misfires on either engine bank. All those test readings LibertyTC asked about will tell you the heath of the motor and possibly what's wrong.


On the very out side is a very very slim chance the PCM is shot but it is extremely rare.


Sent from my iPhone using Tapatalk Pro

 

[tjkj2002]

I stopped to put gas in the jeep then after starting it ran horribly! Codes were misfire on #1,#2,#5 and o2 sensor cat converters. Changed plugs and coil packs on all only code after was o2 and cat converters. Changed o2 sensor no light on but still runs horribly doesn't want to idle and is still missing checked all plugs and #6,#5 not firing got spark on both but clean plug on 6 and wet on 5 with fuel can the converters cause this ran great one minute then bad the next. Have had converter codes for months help please

Your cats are trashed,no way around that and they must be replaced.

But you got bad gas with bad cats equals a bad running engine.

 

[J33Pfan]

I stopped to put gas in the jeep then after starting it ran horribly! Codes were misfire on #1,#2,#5 and o2 sensor cat converters. Changed plugs and coil packs on all only code after was o2 and cat converters. Changed o2 sensor no light on but still runs horribly doesn't want to idle and is still missing checked all plugs and #6,#5 not firing got spark on both but clean plug on 6 and wet on 5 with fuel can the converters cause this ran great one minute then bad the next. Have had converter codes for months help please

Bad Gas is Bad Gas!!

Drain the tank!

No parts cannon can fix the bad gas problem!!

 

[LibertyTC]

IDK but how did I miss the Op's fill up and then run like S--T?
You can try adding some water remover and some of this...
58597[/ATTACH]"]

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This ^ stabilizer has saved the kJ from a bad gas station fill up!

 

[JasonJ]

Are you sure you didn't accidentally fill it up with diesel?

 

[J33Pfan]

IDK but how did I miss the Op's fill up and then run like S--T?
You can try adding some water remover and some of this...
58599[/ATTACH]"]

You must be registered for see images attach

This ^ stabilizer has saved the kJ from a bad gas station fill up!

Many Years ago ...I use to work at a gas station. you wouldnt believe what crap could be at the bottom of an underground gas tank. and yea, maybe some diesel too!

If thats in your car, you really want to pull the tank out to clean it!