[Jaymes]

so, I just installed the ptb from supermod. I have a question. My truck is manual, 2.9 regular cab. when i installed it and let it run for 10 mins and took it for a test drive. backing out of the garage it revs up without me pushing the gas. it does this when i am moving or put it into neutral and it seems like it is dependent on my speed as well.

I know the engine revs up a little bit when in neutral at higher speed but only by maybe 200 rpm. It is reving up to just below 2000 rpm and just over 2000 rpm depending on speed.

Do you guys have any suggestions?

 

[GregDAP]

Did you pull the pcmb fuse before installing the PTB?

 

[Jaymes]

Yes i did. I followed the instructions supermod sent. do you have to put the pcmb and neg battery terminal back on in a certain order? I did drive the truck around cause i thought it might need to relearn but that was not successful.

 

[GregDAP]

No it shouldn't matter what order you put them back. Send supermod a PM about the problem. It may take a bit for him to respond. You can try un hooking the negative battery cable again and let it sit for an hour or so then re connect and let idle again for 10 minutes and see if it clears up the problem

 

[Guest]

Just check post #1051. You need a tune
http://www.355nation.net/forum/i4-i5-engine-drivetrain/24313-ported-throttle-bodies-supermod-35.html

 

[Jaymes]

I'm gonna let it sit overnight. Could it be a vacuum leak? also the truck did not throw any codes and my scangauge says there are no codes as well.

 

[Guest]

Sorry check post #1050. Explained by James supermod
http://www.355nation.net/forum/i4-i5-engine-drivetrain/24313-ported-throttle-bodies-supermod-35.html

 

[Jaymes]

Thanks. I really hope thats not it.. I don't want to spend the money for a tune and i have an emissions test tomorrow...

 

[Guest]

Ask James for a mail tune, will be à lot cheaper than dyno tune. Tell him all the mods you have done TO your truck, and hé will tune your truck according TO them.

 

[Supermodulation]

You need to leave the battery disconnected for at least several hours to reset your PCM,
If you throw a code or have a high idle then leave your battery disconnected over night.

Send me a txt and let me know your results 732-690-6443

Thanks,
James

 

[Skizzo]

I would think the high idle is due to the PCM having learned the "best" position for idle with your old TB and now it is re-learning the "best" position with your ported throttlebody. Forcing a re-learn by Supermods suggestion should work just fine or giving it some time to learn itself.

 

[Jaymes]

Do you have a ballpark estimate on the amount of time it would relearn itself?

 

[1BADI5]

When I weeked the TB on my Tahoe it took a couple days for it to settle into place.

My 04 Colorado 3.5 was good with a with PCMB fuse pulled and the NEG battery terminal removed for a few hours.

Trucks are like people, they all react a little bit different then others

 

[Supermodulation]

I spoke with Jaymes on the phone today and he's going to do some more testing for me.

 

[Jesse]

James never fails! :high5:

 

[2011CanyonWT]

My truck did the same thing. Figured it needed to a tune and replaced the PTB with the stock TB. I'll get to the tune eventually

 

[Jaymes]

Well, over the past day I have driven the truck a lot and it has improved a lot but still not 100%, but I suspect like others have said the truck is relearning. I talked to James and he told me to keep my old tb until it works correctly so I am probably going to ship it back Monday or Wednesday.
I will give an update on how its working in the next few days.

Thanks guys!!

 

[Clutch]

If you find a fix for this let me know. I also have his PTB, and a 5 speed (3.5). I had my truck tuned on the dyno and disnonnected my battery in the past for other issues. Still have this problem with it just holding rpms once I start the truck every odd morning. It's damn annoying. I probably installed this PTB August '13. 6 months and no "relearn" happened, then I got it tuned in January 14 and same issue to this day.

 

[Jaymes]

Have you checked for a vacuum leak? That could cause it.

Did it improve at all after you installed it or did it stay the exactly the same?

 

[Clutch]

My truck never held RPMs till I installed the PTB. There isn't a vacuum leak.