Stepper Motor

Post by **dstocks** » Thu Feb 21, 2008 4:00 pm

Is the stepper motor also known as a throttle body sensor. I am going to look into a new part price for these and need the part number. I think it is MD6147635 or MD614736, but am not 100% sure.

Any help would be appreciated.

Post by **I8A4RE** » Thu Feb 21, 2008 4:39 pm

In answer to your question.... NO, the stepper motor is an idle speed control valve ,where as TPS (throttle postion sensor) tells the ECU how far the throttle is open so it then can supply correct fuel etc.

A faulty stepper motor would cause idle speed fluctuations and possibly engine cutting out when cold.

Hope this helps

Post by **dstocks** » Thu Feb 21, 2008 5:07 pm

OK was clicking on the wrong PNC in Caps. Is this better:

MD614568 Servo Kit, throttle body
MD628054 Servo Kit, throttle body
MD628056 Servo Kit, throttle body

Post by **I8A4RE** » Thu Feb 21, 2008 5:47 pm

Im not sure what you are wanting to know now. the first two part numbers are pointing me to EVO stepper motors the last one is pointing to galant legnum, but it also shows me a v6 one underneath but it wont give me the part number

Post by **dstocks** » Thu Feb 21, 2008 6:40 pm

THese 3 come up in CAPS for different models of FTO. Just want to make sure they are stepper motor. Ill get a price on all 3 numbers if they actually are stepper motors (I think I have it right this time)

Post by **Bennoz** » Thu Feb 21, 2008 6:45 pm

dstocks wrote:OK was clicking on the wrong PNC in Caps. Is this better:

MD614568 Servo Kit, throttle body
MD628054 Servo Kit, throttle body
MD628056 Servo Kit, throttle body

Yep, thats it. Although Im not getting the last part number coming up. Perhaps its the GS version...

Post by **Bennoz** » Thu Feb 21, 2008 6:49 pm

Edit: Nope, its a DE3A part number. Would be DE2A if it was GS...

Post by **I8A4RE** » Thu Feb 21, 2008 7:00 pm

Yeap they definitly are all for stepper motors

elusi0n · Post by **elusi0n** » Tue Feb 26, 2008 12:10 am

just a quick question, my car is idling on roughly 300 - 500 rpm, is a faulty stepper motor the cause of this? Thanks

Post by **Bennoz** » Tue Feb 26, 2008 7:37 am

elusi0n wrote:just a quick question, my car is idling on roughly 300 - 500 rpm, is a faulty stepper motor the cause of this? Thanks

Does it bounce around that rpm or is it constant?

Post by **I8A4RE** » Tue Feb 26, 2008 9:30 am

Seems like its idling low arent these suppose to idle like 750- 800rpm

FTO99R · Post by **FTO99R** » Tue Feb 26, 2008 5:22 pm

elusi0n wrote:just a quick question, my car is idling on roughly 300 - 500 rpm, is a faulty stepper motor the cause of this? Thanks

I'm surprised its idling at all at those sort of revs!

Post by **I8A4RE** » Tue Feb 26, 2008 6:12 pm

Agreed

Post by **aza013** » Tue Feb 26, 2008 6:23 pm

my car sits at 680-740rpm wich I think is a little low

Post by **I8A4RE** » Tue Feb 26, 2008 6:25 pm

i think about 750-850 is the correct rpm for these engines but dont qoute me. I have never heard a engine idle at 300 without stalling

elusi0n · Post by **elusi0n** » Wed Feb 27, 2008 7:00 am

when i first start off the engine, it revs up to like 1.5 rpm and drops to 1 rpm. Once i put it into D then it will drop to 500 and bounces between 300 and 500. Sometimes when im driving and stop at the lights, it drops close to 100 or 200 but comes back up to 500. Never had the engine turned off due to low rpm though which is kinda weird. Sounds like it wants to but it just comes back up again.

Post by **dstocks** » Wed Feb 27, 2008 7:38 am

Sounds like the stepper motor to me

Richy · Post by **Richy** » Wed Feb 27, 2008 10:30 am

my car is idling on roughly 300 - 500 rpm

think mines around the same too....(is that mean i have to spend more $$..

)

Post by **I8A4RE** » Wed Feb 27, 2008 6:23 pm

Im totally shocked to hear that it is still idling at 300 -500 but anyway,
definitly agree with Dstocks totally sounds like stepper motor.

Tbone · Post by **Tbone** » Fri Feb 29, 2008 7:31 pm

Hi, I just created a page asking about the stepper motor as well.

Where were you guys checking out the part numbers for these parts?