Rattling upon acceleration

[Fonzilla85]

Approximately four days ago, I began to hear the same rattling sound coming from the engine compartment. So far the Jeep has been running normal; however, the sound is anything but normal. Like others have noted, the sound can be heard from inside and out and is louder while accelerating. I’ve contacted the dealer and have a service appointment on Thursday, I hope I’ll be able to get some answers then.

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[DougJaneway]

Approximately four days ago, I began to hear the same rattling sound coming from the engine compartment. So far the Jeep has been running normal; however, the sound is anything but normal. Like others have noted, the sound can be heard from inside and out and is louder while accelerating. I’ve contacted the dealer and have a service appointment on Thursday, I hope I’ll be able to get some answers then.

Does anyone have an update yet?

 

[DougJaneway]

They believed that there is a big possibility that the valve itself fail by getting stuck open and was causing the misfire. So far this is day 2 and the engine is running great with no pre-detonation heard!

Is this still working for you?

 

[Hau82]

Is this still working for you?

80% better!!

Sometimes I can hear a little bit of misfire but nothing like before that's why I said its 80% better, engine feels strong. I'll keep updating!!

 

[DougJaneway]

80% better!!

Sometimes I can hear a little bit of misfire but nothing like before that's why I said its 80% better, engine feels strong. I'll keep updating!!

Would you mind giving us another update? This still working for you?

 

[JMONEZ]

Yes please do, as the weather is warming up mine is getting more noticeable again and driving me crazy. TIA

 

[DougJaneway]

Yes please do, as the weather is warming up mine is getting more noticeable again and driving me crazy. TIA

Mine is still going too. It's unnerving.

 

[Hau82]

Hi guys

So the misfire came back a few weeks ago I have try everything without good results so finally about 3 gas tanks ago I found a long term expensive solution, it has been 3 tanks of premium gas (91 octane) and a bottle of Lucas octane booster (3 real points of boost) on each tank, since tank 1 the misfire completely went away, I know that is an expensive solution but I rather spend an extra 8 dollars a tank (booster cost) and wait for a possible FCA solution than have the dealership keep my Wrangler for weeks trying to figure out what we already know what the problem is. So, this proves is that the air/fuel ratio tune is definitely too lean. @JeepCares FCA needs to take action with the current Tuner and update the tunning ASAP, I'm pretty sure if this doesn't get fixed, it will cause future engine problems to a lot of Wranglers JL 3.6

 

[Litfuse]

Hi guys

So the misfire came back a few weeks ago I have try everything without good results so finally about 3 gas tanks ago I found a long term expensive solution, it has been 3 tanks of premium gas (91 octane) and a bottle of Lucas octane booster (3 real points of boost) on each tank, since tank 1 the misfire completely went away, I know that is an expensive solution but I rather spend an extra 8 dollars a tank (booster cost) and wait for a possible FCA solution than have the dealership keep my Wrangler for weeks trying to figure out what we already know what the problem is. So, this proves is that the air/fuel ratio tune is definitely too lean. @JeepCares FCA needs to take action with the current Tuner and update the tunning ASAP, I'm pretty sure if this doesn't get fixed, it will cause future engine problems to a lot of Wranglers JL 3.6

I have reached out to JeepCares about this and no reply. One thing to consider is a catch can. I know that even the mention of a catch can can get people fired up with a debate, but I was shocked by how much my CC trapped in a short amount of time. It made me wonder about the degradation of fuel quality and octane rating.

 

[Ronnie S]

I have reached out to JeepCares about this and no reply. One thing to consider is a catch can. I know that even the mention of a catch can can get people fired up with a debate, but I was shocked by how much my CC trapped in a short amount of time. It made me wonder about the degradation of fuel quality and octane rating.

Do you think running a higher octane may work?

 

[JeepCares]

Hi guys

So the misfire came back a few weeks ago I have try everything without good results so finally about 3 gas tanks ago I found a long term expensive solution, it has been 3 tanks of premium gas (91 octane) and a bottle of Lucas octane booster (3 real points of boost) on each tank, since tank 1 the misfire completely went away, I know that is an expensive solution but I rather spend an extra 8 dollars a tank (booster cost) and wait for a possible FCA solution than have the dealership keep my Wrangler for weeks trying to figure out what we already know what the problem is. So, this proves is that the air/fuel ratio tune is definitely too lean. @JeepCares FCA needs to take action with the current Tuner and update the tunning ASAP, I'm pretty sure if this doesn't get fixed, it will cause future engine problems to a lot of Wranglers JL 3.6

Hi Hau82,
We greatly appreciate your input on this matter. We apologize that your dealer was unable to resolve this for you. Please send us a private message if this concern returns so we can assist you further.

I have reached out to JeepCares about this and no reply. One thing to consider is a catch can. I know that even the mention of a catch can can get people fired up with a debate, but I was shocked by how much my CC trapped in a short amount of time. It made me wonder about the degradation of fuel quality and octane rating.

Hi Litfuse,
We're sorry that you have not received a response from us. We would like to take the time to help you with your concerns if you'd like to send us a private message. That way, we can be sure to see your message and better assist you.

Lydia
Jeep Social Care Specialist

 

[Litfuse]

Hi Hau82,
We greatly appreciate your input on this matter. We apologize that your dealer was unable to resolve this for you. Please send us a private message if this concern returns so we can assist you further.



Hi Litfuse,
We're sorry that you have not received a response from us. We would like to take the time to help you with your concerns if you'd like to send us a private message. That way, we can be sure to see your message and better assist you.

Lydia
Jeep Social Care Specialist

Thank you Lydia, but I sold the Jeep because of this issue. If your department reports to someone who has access to product development and engineering, I would suggest sharing this with them.

Although I know your position is to help individual owners, I would also suggest to you and FCA to use this site as an ongoing product survey. Free of charge and quiet comprehensive.

 

[Litfuse]

Do you think running a higher octane may work?

I think it may be possible. I never had pre-denotation on my Jeep. But I also ran a CC. I tried higher octane several times, but saw no difference in performance. However, I would never know the true performance of the motor unless I did a data log.

 

[Ronnie S]

I think it may be possible. I never had pre-denotation on my Jeep. But I also ran a CC. I tried higher octane several times, but saw no difference in performance. However, I would never know the true performance of the motor unless I did a data log.

I don't have the pre-detonation on my Jeep either. Just wondering if maybe running higher octane would help with some of these issues.

 

[Litfuse]

I don't have the pre-detonation on my Jeep either. Just wondering if maybe running higher octane would help with some of these issues.

Yeah, I don’t know. I think if you are not having issues, don’t waste the money on higher octane fuel.

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