04 Wrangler: Misfire while driving and at stop

[Chris]

When it comes to our Jeeps, aftermarket sensors simply don't work. This has been proven time-and-time again from everything to crankshaft position sensors to O2 sensors. I don't know why this is, but our Jeeps just don't like aftermarket sensors. When I used a replacement CPS sensor on mine, it wouldn't lose the code (or the running issues), but as soon as I put an OE sensor in, it got rid of it.

Again, this isn't anything new, it's pretty well known amongst veteran TJ owners. So that right there is likely your entire problem, or at least part of it. But that's where I would start at least, by replacing the sensors with OE Mopar sensors, so that way you can at least rule them out as the culprit.

BTW, that's a fine looking LJ! I love your choice in wheels/ tires!

 

[Rusty04jeep]

When it comes to our Jeeps, aftermarket sensors simply don't work. This has been proven time-and-time again from everything to crankshaft position sensors to O2 sensors. I don't know why this is, but our Jeeps just don't like aftermarket sensors. When I used a replacement CPS sensor on mine, it wouldn't lose the code (or the running issues), but as soon as I put an OE sensor in, it got rid of it.

Again, this isn't anything new, it's pretty well known amongst veteran TJ owners. So that right there is likely your entire problem, or at least part of it. But that's where I would start at least, by replacing the sensors with OE Mopar sensors, so that way you can at least rule them out as the culprit.

BTW, that's a fine looking LJ! I love your choice in wheels/ tires!

I am new to this meaning my first Jeep I always wanted one and I finally got one. I have heard they are picky about what parts you put on them especially the plugs. It will take several days for me to get a new one so I will definitely let you know gonna start over with plugs and this sensor and see what happens. And thank you that's tires and wheels off my buddies Rubicon.

 

[Chris]

I am new to this meaning my first Jeep I always wanted one and I finally got one. I have heard they are picky about what parts you put on them especially the plugs. It will take several days for me to get a new one so I will definitely let you know gonna start over with plugs and this sensor and see what happens. And thank you that's tires and wheels off my buddies Rubicon.

Trust me, the non-OE sensor thing puzzles the hell out of me. I'm sitting here wondering why it is that an aftermarket sensor works on almost any other vehicle out there, but why they almost never seem to work right on a Jeep Wrangler. The only thing I can chalk it up to (since I'm not an electrical engineer) is that Jeeps have very finicky electrical systems (which is actually true). That being said, I learned my lesson years ago that when it comes to sensors on these things, you always have to use OE replacement parts.

Of course what happens when the factory stops making sensors? Then we're screwed unless someone figures it out!

I've got the same wheels / tires on my 2005 Rubicon, so I'm a bit partial!

 

[CaliSteve]

I am gonna start calling her the money pitView attachment 41249[/QUOTE
Gonna get a "Money-Con" decal for my hood!

 

[Jerry Bransford]

Trust me, the non-OE sensor thing puzzles the hell out of me. I'm sitting here wondering why it is that an aftermarket sensor works on almost any other vehicle out there, but why they almost never seem to work right on a Jeep Wrangler. The only thing I can chalk it up to (since I'm not an electrical engineer) is that Jeeps have very finicky electrical systems (which is actually true).

It's not just Jeeps Chris. I tried installing an aftermarket MAF sensoe into a friend's MBZ and it ran like crap. It purred like a kitten after I replaced it with the way more expensive OE Bosch. I was shocked but the Mercedes forum I checked with wasn't.

 

[Chris]

It's not just Jeeps Chris. I tried installing an aftermarket MAF sensoe into a friend's MBZ and it ran like crap. It purred like a kitten after I replaced it with the way more expensive OE Bosch. I was shocked but the Mercedes forum I checked with wasn't.

Interesting! I've only ever tried the aftermarket sensors on lower end Hondas and such, and they never gave me any issues there.

I'm sure if we could find aftermarket sensors for our TJs from a company like Bosch, they'd probably work just fine. But a company like that is building things to higher standards than the "Duralast" in-house Autozone brand for instance. That's just cheap Chinese crap they pump out for pennies on the dollar I suspect.

 

[Jerry Bransford]

Interesting! I've only ever tried the aftermarket sensors on lower end Hondas and such, and they never gave me any issues there.

I'm sure if we could find aftermarket sensors for our TJs from a company like Bosch, they'd probably work just fine. But a company like that is building things to higher standards than the "Duralast" in-house Autozone brand for instance. That's just cheap Chinese crap they pump out for pennies on the dollar I suspect.

I don't know but even Bosch O2 sensors have earned a reputation for not working well in our Jeeps. Same with Bosch spark plugs. Though certainly Bosch fuel pumps are preferred and actually the OEM for our Jeeps. So I guess it all depends.

 

[Chris]

I don't know but even Bosch O2 sensors have earned a reputation for not working well in our Jeeps. Same with Bosch spark plugs. Though certainly Bosch fuel pumps are preferred and actually the OEM for our Jeeps. So I guess it all depends.

Again, total weirdness! Especially given that Bosch is an OE supplier for many auto manufacturers, and they don't have a reputation for building crappy parts.

I guess our Jeeps really are just finicky!

 

[Rusty04jeep]

Trust me, the non-OE sensor thing puzzles the hell out of me. I'm sitting here wondering why it is that an aftermarket sensor works on almost any other vehicle out there, but why they almost never seem to work right on a Jeep Wrangler. The only thing I can chalk it up to (since I'm not an electrical engineer) is that Jeeps have very finicky electrical systems (which is actually true). That being said, I learned my lesson years ago that when it comes to sensors on these things, you always have to use OE replacement parts.

Of course what happens when the factory stops making sensors? Then we're screwed unless someone figures it out!

I've got the same wheels / tires on my 2005 Rubicon, so I'm a bit partial![/QUOTE]

Trust me, the non-OE sensor thing puzzles the hell out of me. I'm sitting here wondering why it is that an aftermarket sensor works on almost any other vehicle out there, but why they almost never seem to work right on a Jeep Wrangler. The only thing I can chalk it up to (since I'm not an electrical engineer) is that Jeeps have very finicky electrical systems (which is actually true). That being said, I learned my lesson years ago that when it comes to sensors on these things, you always have to use OE replacement parts.

Of course what happens when the factory stops making sensors? Then we're screwed unless someone figures it out!

I've got the same wheels / tires on my 2005 Rubicon, so I'm a bit partial!

Trust me, the non-OE sensor thing puzzles the hell out of me. I'm sitting here wondering why it is that an aftermarket sensor works on almost any other vehicle out there, but why they almost never seem to work right on a Jeep Wrangler. The only thing I can chalk it up to (since I'm not an electrical engineer) is that Jeeps have very finicky electrical systems (which is actually true). That being said, I learned my lesson years ago that when it comes to sensors on these things, you always have to use OE replacement parts.

Of course what happens when the factory stops making sensors? Then we're screwed unless someone figures it out!

I've got the same wheels / tires on my 2005 Rubicon, so I'm a bit partial!

Trust me, the non-OE sensor thing puzzles the hell out of me. I'm sitting here wondering why it is that an aftermarket sensor works on almost any other vehicle out there, but why they almost never seem to work right on a Jeep Wrangler. The only thing I can chalk it up to (since I'm not an electrical engineer) is that Jeeps have very finicky electrical systems (which is actually true). That being said, I learned my lesson years ago that when it comes to sensors on these things, you always have to use OE replacement parts.

Of course what happens when the factory stops making sensors? Then we're screwed unless someone figures it out!

I've got the same wheels / tires on my 2005 Rubicon, so I'm a bit partial!

Trust me, the non-OE sensor thing puzzles the hell out of me. I'm sitting here wondering why it is that an aftermarket sensor works on almost any other vehicle out there, but why they almost never seem to work right on a Jeep Wrangler. The only thing I can chalk it up to (since I'm not an electrical engineer) is that Jeeps have very finicky electrical systems (which is actually true). That being said, I learned my lesson years ago that when it comes to sensors on these things, you always have to use OE replacement parts.

Of course what happens when the factory stops making sensors? Then we're screwed unless someone figures it out!

I've got the same wheels / tires on my 2005 Rubicon, so I'm a bit partial!

Again, total weirdness! Especially given that Bosch is an OE supplier for many auto manufacturers, and they don't have a reputation for building crappy parts.

I guess our Jeeps really are just finicky!

 

[Rusty04jeep]

Hey Chris you asked last night was it doing it when it was cops.... I thought about it and if I recall yes it use to not do it till it started to warm up now it does it straight from start up. I wish I could show you a video on Facebook I have you can hear it at exhaust

 

[Rusty04jeep]

It's not just Jeeps Chris. I tried installing an aftermarket MAF sensoe into a friend's MBZ and it ran like crap. It purred like a kitten after I replaced it with the way more expensive OE Bosch. I was shocked but the Mercedes forum I checked with wasn't.

Hey Jerry Brantford I sent you a video message on Facebook if you listen to the exhaust you can hear it when it feels like a misfire. I don't remember who asked if it happens when it is cold start up but I did think about it today it use to not do it till it started to warm up but for a while now it does it as soon as you start up

 

[mudslinger862004]

Hey Jerry Brantford I sent you a video message on Facebook if you listen to the exhaust you can hear it when it feels like a misfire. I don't remember who asked if it happens when it is cold start up but I did think about it today it use to not do it till it started to warm up but for a while now it does it as soon as you start up

Did you ever figure out the problem ? I am having the same issue's.

 

[ebourlet]

Any updates?

 

[ebourlet]

Any updates?

 

[mudslinger862004]

Did you ever figure out the problem ? I am having the same issue's.

yes, it was the cam. Second lobe back was completely rounded off.