Mustang reving abnormally

Hawk5252

New Member

Jun 4, 2007

35

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0

Oct 16, 2007

#1

• Oct 16, 2007

• #1

Guys -

Can use some help or advice. I noticed Saturday that my 2005 Mustang Gt was reving abnormally when I came to a stop sign. It would drop down to ~500 rpm and then rev back to ~1200 rpm. Bounce back and forth for a few seconds before settling into 800 rpms. I do have an Demolet 93 octane tune and have posed this same question to John to see if he has any ideas, awaiting response. I have been working on installing a Zex system but not 100% installed. Spoke to some Comp Cam guys and they suggested that I may have loosened the Air Control located on the throttle body. Right now I am kinda stuck and need any help or suggestions anyone might have.

thanks....

 

H

HEAVYGT

New Member

Sep 14, 2006

241

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Elgin, IL.

Oct 16, 2007

#2

• Oct 16, 2007

• #2

Hawk5252 said:

Guys -

Can use some help or advice. I noticed Saturday that my 2005 Mustang Gt was reving abnormally when I came to a stop sign. It would drop down to ~500 rpm and then rev back to ~1200 rpm. Bounce back and forth for a few seconds before settling into 800 rpms. I do have an Demolet 93 octane tune and have posed this same question to John to see if he has any ideas, awaiting response. I have been working on installing a Zex system but not 100% installed. Spoke to some Comp Cam guys and they suggested that I may have loosened the Air Control located on the throttle body. Right now I am kinda stuck and need any help or suggestions anyone might have.

thanks....

Click to expand...

What kind of CAI do you have...???

 

JTGrant

New Member

Aug 2, 2005

775

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GA

Oct 16, 2007

#3

• Oct 16, 2007

• #3

The 05 and up stangs don't have an Idle air control valve, it all done electronicly by the PCM and the Throttle body.

 

Hawk5252

New Member

Jun 4, 2007

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Oct 16, 2007

#4

• Oct 16, 2007

• #4

Heavy - It is a Demolet (Tuneable Inductions) with SCT xcal2 93 octane tune.

JTgrant - I think the guys at comp cams were speaking of the wire connection - plan to check it out as soon as i get outta work - not sure about this one.

 

DarkFireGT

Playing with my wife's really makes me want one.

10 Year Member

May 23, 2004

692

10

89

East Moline, IL

Oct 16, 2007

#5

• Oct 16, 2007

• #5

Try reloading your tune. I reload my tune before very race night, and about every other fill-up.

 

fartingchicken

New Member

Sep 11, 2007

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Oct 16, 2007

#6

• Oct 16, 2007

• #6

Need to run some Techron additive or BG 44K?

 

S

SP_51-F1

Member

Oct 26, 2004

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Austin

Oct 16, 2007

#7

• Oct 16, 2007

• #7

Clean your throttle body. Use a throttle body cleaner that will not harm the coating.

 

K

kkdoughboy

New Member

Jul 20, 2007

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Pennsylvania

Oct 16, 2007

#8

• Oct 16, 2007

• #8

I'm not sure if you mounted the spray nozzles for the Zex unit yet, but if you did make sure you dont have an air leak in the CAI where you drilled your hole for mounting. Also, check the TPS wiring and make sure you didnt pull a wire out when tapping into it for the NMU

 

Hawk5252

New Member

Jun 4, 2007

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Oct 17, 2007

#9

• Oct 17, 2007

• #9

Thanks guys - I reloaded the tune and cleaned the throttle body - it seemed to help - time will tell. It was cruded up pretty bad, imo. I did check the wiring and where I tapped into the CAI - it checks out ok. I will drive a couple of days and probably clean the throttle body again and make it a part or recurring maintenance. I really appreciate everyone's help - I can only imagine what they charge to clean the throttle body.

 

W

welchy

Active User

Mar 30, 2006

11

4

29

Oct 19, 2007

#10

• Oct 19, 2007

• #10

I had the same problem. My CAI had come loose and was sucking too much air. Make sure you do not have any air leaks any where, everything tightened up , etc..

 

S

ski

Member

Dec 14, 2004

380

2

18

Oct 19, 2007

#11

• Oct 19, 2007

• #11

Cleaning the MAF sensor may also help.

 

W

welchy

Active User

Mar 30, 2006

11

4

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Oct 19, 2007

#12

• Oct 19, 2007

• #12

+1 That is what I thought was wrong with mine until I cracked the hood.

 

Hawk5252

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Jun 4, 2007

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Oct 21, 2007

#13

• Oct 21, 2007

• #13

hey guys - what is the best way to clean the MAF sensor?

 

DarkFireGT

Playing with my wife's really makes me want one.

10 Year Member

May 23, 2004

692

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89

East Moline, IL

Oct 21, 2007

#14

• Oct 21, 2007

• #14

Hawk5252 said:

hey guys - what is the best way to clean the MAF sensor?

Click to expand...

Autozone sells MAF cleaner. It's just a spray.