GEN 2 Loss of power

[c_phillips02]

Also could be the boost recirculating valve stuck open.

This was a thought I had also. Maybe not closing all the way all the time. Is there a easy way to test to see if this is what’s happening?

 

[thatJeepguy]

Maybe also theres a lot of oil build up in intake plenam or perhaps in intercooler? How does the air filter look? Any obstructions?

 

[TwizzleStix]

This looks like the intake opening is collapsing when it gets warm and soft. Its a known problem discovered by Cobb Tuning. They even captured it on video while trying to figure it out. They also have several parts available to help “fix” it.

 

[c_phillips02]

Maybe also theres a lot of oil build up in intake plenam or perhaps in intercooler? How does the air filter look? Any obstructions?

Air filter is new. Old one didn’t look bad but I replaced it anyway to make sure that wasn’t the problem.

 

[c_phillips02]

This looks like the intake opening is collapsing when it gets warm and soft. It’s a known problem discovered by Cobb Tuning. They even captured it on video while trying to figure it out. They also have several parts available to help “fix” it.

I think that problem was for 3rd gens from reading about it.

 

[TwizzleStix]

I think that problem was for 3rd gens from reading about it.

Yes, but the concept of collapsing intake rubber is always valid, I wouldn't just discount it for that reason.

 

[c_phillips02]

Yes, but the concept of collapsing intake rubber is always valid, I wouldn't just discount it for that reason.

Ok, I’ll check it out. Thanks.

 

[c_phillips02]

@thatJeepguy I just went for a 20min drive after letting the truck warm up and the intercooler shutters stayed closed 99.9% of the drive. They would show 20-30% for a few seconds then back to 0%.

@Fire Ball 20min drive 60mph average IAT 87-89* with 78* outside temp. CAC was 110-120*. IAT2 was 120*+ the whole time. Seen up to 130* IAT2 while driving.

 

[thatJeepguy]

@thatJeepguy I just went for a 20min drive after letting the truck warm up and the intercooler shutters stayed closed 99.9% of the drive. They would show 20-30% for a few seconds then back to 0%.

@Fire Ball 20min drive 60mph average IAT 87-89* with 78* outside temp. CAC was 110-120*. IAT2 was 120*+ the whole time. Seen up to 130* IAT2 while driving.

Malfunctioning sensor ? Fans not coming on or are fried and overheating?

 

[Zeusmotorworks]

My Gen 2 was pulling up the radiator shroud blocking air. I pinned it down, no more problems.