RPM does not go past 3.5!!!

[mando0010]

I have a 07 jeep patriot with an auto CVT tranny. i installed an AEM short ram intake with a heat shield. The problem is that the RPM does not go past 3.5 when I'm driving. Any ideas??
Thanks

[joeyc]

There is a rev limitler when I'm in N or P that limits me to 3500rpms but when I'm driving if I autostick it down it let's me go up to 6000-6100redline. Might be a computer glitch dealer?

[mando0010]

Originally Posted by joeyc

There is a rev limitler when I'm in N or P that limits me to 3500rpms but when I'm driving if I autostick it down it let's me go up to 6000-6100redline. Might be a computer glitch dealer?

Hey what do you mean by autostick? I just bought this patriot like 2months ago...is that a function that all patriots have??

[todde702]

2007 models did not get the autostick. That was a new feature on 2008 and up models. I would start by retracing your AEM install. Perhaps you accidentally knocked off a wire connection or something? I know there is a vehicle speed speed sensors wire somewhere around there...does the speedometer still work?

[TeeCat]

Indeed, that sounds like a mass O2 sensor to me. Something similar happened to me in my Xterra when a mass O2 sensor was inadvertently left disconnected by a Midas tech after a courtesy check. Stop by an Advance Auto and ask them to put a code reader on your Jeep; it may throw a code and identify the issue.

TC

[heckler]

The 16 litre Cummins diesels that I work on have a lockdown mode that prevents the truck from running at more than an idle just to get back to the shop whenever an emmisions device is not working properly. Sounds like a similar symptom, like what Teecat suggested.

[trumpetwasher]

Originally Posted by heckler

The 16 litre Cummins diesels that I work on have a lockdown mode that prevents the truck from running at more than an idle just to get back to the shop whenever an emmisions device is not working properly. Sounds like a similar symptom, like what Teecat suggested.

It sounds like it's in "limp" mode to me. I'd be looking at that air intake.

[mando0010]

Originally Posted by todde702

2007 models did not get the autostick. That was a new feature on 2008 and up models. I would start by retracing your AEM install. Perhaps you accidentally knocked off a wire connection or something? I know there is a vehicle speed speed sensors wire somewhere around there...does the speedometer still work?

Yes, the speedometer works fine. The patriot accelerates well from 0 to about 50. After that it still accelerates but not with the same force and obviously that's where the RPM gets stuck at 3.5. Yea i will definitely check out the intake. Now that you mention it the only thing I can think of is that there was a wire zip tied to the inlet tube. I had to cut off the zip tie to remove the old inlet tube. I don't know if that may have something to do with it. ( I doubt it)