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  #1  
Old 01-10-2012, 09:54 AM
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Throttle Body Re learn?

I just swapped out my FRP TB for a stock unit. Ive decided to put everything performance wise back to stock except for my CAI. I was reading on the Superchips site that one of the benefits of the Flashpak is that you can re learn the TB. Is that something that i need to do now and will it effect my MPGs?

http://www.superchips.com/Store/JeepFlashpaq.aspx
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Old 01-10-2012, 10:06 AM
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Re: Throttle Body Re learn?

Kyle that's a Hemi/08+ 4.7 thing. Electronic throttle bodies have the ability to re-learn throttle sensitivity.

Hope you enjoyed my TB while you had it, while it seems that most see better than stock mileage, I understand that you gotta do what you gotta do. Let me know when it's in the mail.
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Old 01-10-2012, 10:21 AM
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Re: Throttle Body Re learn?

Ok, I was unsure. I know that when i had my 4.0L XJ and i replaced the TPS i had to re learn the sensor.

Im returning everything to stock because when i first got my WK everything was stock and i was getting an average 15 + MPGs in city and 18 to 21 mpgs highway. Since ive done my exhaust about two years ago and the TB a year or less ago i feel that my performance mods have cost me MPGs. im averaging about 12 to 13 mpgs city or less and 15 highway.

Im going by the old saying that more performance means you want to feel/Hear the performance more. I dont really have the money right now for any mods at least any good mods that will really help my MPGs/performance effectively any way so im returning my jeep to stock grocery getter duty until i can financially afford to have fun with my jeep. Its our primary family vehicle and ive really grown out of the noisy exhaust as well. lol
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Old 01-10-2012, 10:30 AM
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Re: Throttle Body Re learn?

You probably have other issues. Catalytic converters, Map sensors, coil packs etc can all deteriorate over time with no obvious signs.
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Old 01-10-2012, 10:33 AM
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Re: Throttle Body Re learn?

It wont throw any codes?

Im going to do my spark plugs next week, ive not dont them for about 30k miles.

What about 02 sensors.

What is the threshold of some of these sensors where they will be going bad but wont throw a code/CEL.

Performance wise, my jeep feels plenty responsive for a gen1 4.7L.

Also ive read in another thread that it could be a bad fan clutch that could be putting alot of extra dead weight on the engine.
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Old 01-10-2012, 10:47 AM
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Re: Throttle Body Re learn?

Quote:
Originally Posted by NHWK05 View Post
It wont throw any codes?

Im going to do my spark plugs next week, ive not dont them for about 30k miles.

What about 02 sensors.

What is the threshold of some of these sensors where they will be going bad but wont throw a code/CEL.

Performance wise, my jeep feels plenty responsive for a gen1 4.7L.

Also ive read in another thread that it could be a bad fan clutch that could be putting alot of extra dead weight on the engine.
They should at some point, but many times they do not. I speak from experience.
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Old 01-11-2012, 08:41 AM
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Re: Throttle Body Re learn?

So now what, spend hundreds of dollars replacing 02 sensors and other sensors and parts etc and hope for the best or can i get someone with a scan tool to plug in and they can tell which sensors are not working the best? If thats even possible?
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Old 01-11-2012, 08:46 AM
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Re: Throttle Body Re learn?

Datalog...fuel trims tell a pretty compelling story...

Depending on mileage may be time to replace O2s
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Old 01-11-2012, 08:47 AM
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Re: Throttle Body Re learn?

Its got 105K on it. Ive had it since 60k and it seemed that when i bought it all the fluids and scheduled services had been done but im sure (unless it had a CEL) that the 02 sensors were not done so im sure they are over due.

How many O2s does the 4.7 have? 4?
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Old 01-11-2012, 08:53 AM
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Re: Throttle Body Re learn?

Read jeepcomans thread on o2 sensors etc , youll learn alot..
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Old 01-11-2012, 09:05 AM
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Re: Throttle Body Re learn?

OK thanks!
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Old 01-26-2012, 06:14 PM
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Re: Throttle Body Re learn?

Kyle You might be thinking about the IAC motor.If you unhook all of the wires the IAC may have to relearn the idle. It may stall for a few minutes when you let off of the gas. You may even have to take it down the road for a few miles till it gets it right. This mostly happens on a dead battery condition though.
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