Weird Idle- All G owners should take notice!

[telcoman]

Cleaned my throttle body and MAF tonight.

Engine Light came on, I reset it. SES light goes off, but idle is high, about 1100 rpms.

I performed throttle closed position relearn.

Then I performed idle air relearn.

Idle drops to about 900 rpms.

I performed idle air relearn again.

Idle drops to about 780-800 rpms.

I went for a drive and everything seems normal EXCEPT when I am braking. I can feel the transmission dropping RPM & raising RPM. When I feel it go into the next gear down its like the RPMs surge the car forward for a half second and the RPMs bounce to 900 then 1400 a couple times.

Anybody had this happen before?

I just got this. Very easy to use. Just connect it



Maybe you should too?

Not expensive on amazon.com

Telcoman

[tollboothwilley]

Well, I know what the problem is. I have swapped TB's before with my friend with success. After buying 2 throttle bodies I can't believe it won't work.

That scanner tool will not help with my current problem, but i probably should buy something similar

[tollboothwilley]

Another update. I installed my friends 350Z TB into my car. It worked perfect...idle air relearned quickly and idle dropped to around 650 rpms.

Tested all 3 TB's that I have now in his 350Z. NONE OF THEM WORKED.

Glad to know its not just my car. Pissed that I have 3 throttle bodies that don't work. I'm sending them away...1 for a refund, 1 for a replacement, and when the replacement gets here the other is going back as a core exchange.

Gotta tell you, this is the worst.

[SteveTheTech]

That sucks, maybe stuff from the dealer isn't always just a rip off. I am sorry to hear about your frustrations but I hope that others can learn from this thread and realize the dealers are not just out to separate you from your hard earned money. This does indeed happen sometimes. The money and frustration could have been resolved easily and if the part was purchased from a dealer and found to be inoperative they can usually be returned or exchanged. I'm not trying to salt your wounds just make something useful out of a bad situation.

Oh I was bored this week and snapped a few pics of what all is inside on a throttle motor.

Normal, dirty looking dead unit. Internal TPS failure. This one shows the internal components, once you cut out the rivets. All the electronics are inside the black case, there is both the supply circuit and TPS sensors are sealed into the cover and are not accessible at all. I triedThis one illustrates the other components inside the case. I was a little surprised to see the simplicity of the design I sincerely expected more. There are plastic gears and counter springs and a simple DC reversible polarity motor, that actually has a decent amount of torque.I have added the motor to my collection of electronic randomness as it may be needed somewhere down the road for something else. (I have a large stash of electric motors, sensors, switch and any other type of electronic devices) for just this type of conversation.

Good Luck John, what are you going to do with your stock pile? Are any of the returnable?

[telcoman]

...this is why I won't clean my TB or MAF.

+1

I may be an old farht but I learned a long time ago to never try to fix anything that isn't broke.

I change my air filter a few times a year and every thing behind it is still spotlessly clean at 81k miles and 3 years and two months.

Telcoman

[tollboothwilley]

I'm going to be returning the ones I bought that don't work.

How is it possible that cleaning the TB ruins? From your ruined TB that you took pictures of did you see what would have cause to fail? Its obviously not the motor, It is still functional.

[SteveTheTech]

I really have no idea what took that one out or why it was in the trash, I don't question. I have yet to hook up my meter and manually check the internal sensors. If I get time this week, I'll get into it. There were no visable signs of damage although all the internal circuitry is sealed in the case. Maybe they are like the old fords that used a "special" coating on the on the butterfly, or maybe it has to do with a learned position that the sensor knows and moving the butterfly tends to through it's base logic off.

[tollboothwilley]

I think that your second guess is more likely....

I assume that the throttle plate (butterfly) if moved manually at all can and will throw off the base of some setting.

I don't understand why it would be so sensitive though

[4drmadness]

did u get the new TB yet?

[tollboothwilley]

On its way...

Should be here on Sat is what FedEx says

[tollboothwilley]

Got another TB from RockAuto. They replaced the one that was bad. Installed, RPMS dropped to 700. We're back in business.

I also put my 19's back on the car today...I'll see if i can wash and have a photoshoot sometime.

[4drmadness]

nice. time to have fun with all the new mods u got.