Surging Re-visted

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

208

104

New Jersey

Feb 22, 2014

#1

• Feb 22, 2014

• #1

Today I finally got to go work on the car a little..checked grounds they were good..re checked TPS reading they looked right on...I do want to buy a new TPS and IAC...just because I have no idea how old these are...car started right up...runs great...now IT does start right back up but surges wont stay idling..i did notice this time because I watched this time my Air fuel gauge was reading in the 11s idiling..once the car and idle went back to normal so did Air fuels...now im wondering whats up with that???. also I did notice the idle to wander a little were it was always pretty steady only while it 1st started then the idle seemed o go back to normal took the car for ride man it run good when its running...lol....

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

42,885

21,064

234

Box behind Walmart

Feb 22, 2014

#2

• Feb 22, 2014

• #2

Have you seen @jrichker 's Surging Idle Checklist?

Here's a link: http://www.stangnet.com/mustang-forums/threads/help-me-create-the-surging-idle-checklist.698148/

 

madspeed

Colonel Mustard

Founding Member

Nov 29, 1999

8,914

1,332

204

a van down by the river

Feb 22, 2014

#3

• Feb 22, 2014

• #3

I dont recall, but do you have a custom tune?

 

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

208

104

New Jersey

Feb 22, 2014

#4

• Feb 22, 2014

• #4

yes I read the base idle reset didn't do anything for me...

Moates QH...but I never liked the tune...I want to do a re-tune with maybe a PMS or have a chip done for it...but I was trying to find why it did this HOT re-start surge...I mean I can video it for you guys ...car never does it when cold just hot....

 

madspeed

Colonel Mustard

Founding Member

Nov 29, 1999

8,914

1,332

204

a van down by the river

Feb 22, 2014

#5

• Feb 22, 2014

• #5

Dont even consider swapping out the QuarterHorse, just get a real tune. I can send you my guys info, he did an email tune for me and is pretty well known

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

42,885

21,064

234

Box behind Walmart

Feb 22, 2014

#6

• Feb 22, 2014

• #6

MY 85 GT said:

yes I read the base idle reset didn't do anything for me...

Moates QH...but I never liked the tune...I want to do a re-tune with maybe a PMS or have a chip done for it...but I was trying to find why it did this HOT re-start surge...I mean I can video it for you guys ...car never does it when cold just hot....

Click to expand...

You should have lead with that info.

 

madspeed

Colonel Mustard

Founding Member

Nov 29, 1999

8,914

1,332

204

a van down by the river

Feb 22, 2014

#7

• Feb 22, 2014

• #7

Read the base idle reset or read it and APPLIED it?

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

42,885

21,064

234

Box behind Walmart

Feb 22, 2014

#8

• Feb 22, 2014

• #8

The part about the QH

 

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

208

104

New Jersey

Feb 22, 2014

#9

• Feb 22, 2014

• #9

madspeed said:

Read the base idle reset or read it and APPLIED it?

Click to expand...

I did it 2 times already..

And guys this car ran fine for 3 yrs with the turbo and stuff it just started this about sept...im thinking a bad IAC or TPS...maybe a bad ground...The only thing I changed was my AOD went bad I went to a c4 hated it went back to a Lentech AOD...a few months later this problem occurred...runs fine cold starts fine cold this surging issue starts when the car is hot AND ONLY ON A RE-START after 30 seconds or so the idle goes back to normal or if I keep my foot on the gas for a few seconds so the car doesn't stall or surge then its fine again I can drive the car runs great...then if I stop shut it off get gas etc etc go to re-start it bingo does the surge again...then after a few seconds idles fine drives great...shut the car off starts all over again...weird is all I have to say....

 

madspeed

Colonel Mustard

Founding Member

Nov 29, 1999

8,914

1,332

204

a van down by the river

Feb 22, 2014

#10

• Feb 22, 2014

• #10

Ok, you've got the QH, save a few datalogs of this happening and post em up

 

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

208

104

New Jersey

Feb 22, 2014

#11

• Feb 22, 2014

• #11

I have nothing to data log this..I had the shop do all the work and there gone now .

 

jrichker

StangNet's favorite TOOL

In Remembrance. Thank you for your contributions

Mar 10, 2000

27,512

2,811

234

Dublin GA

Feb 23, 2014

#12

• Feb 23, 2014

• #12

How far did you get into the Surging Idle Checklist? Did you read and check all of it or just bits and pieces? Checklist procedures are written so that you start at the top and work your way down to the bottom. Skip a step and you might miss just what you needed to find and fix your problem.

 

madspeed

Colonel Mustard

Founding Member

Nov 29, 1999

8,914

1,332

204

a van down by the river

Feb 23, 2014

#13

• Feb 23, 2014

• #13

I thoight you had a Quarterhorse?

 

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

208

104

New Jersey

Feb 23, 2014

#14

• Feb 23, 2014

• #14

madspeed said:

I thoight you had a Quarterhorse?

Click to expand...

Yeah but I didn't install it I don't have th hardware to data log it...I paid for my car to get done...I picked it up it was turn key...

 

MY 85 GT

10 Year Member

Mar 7, 2008

1,852

208

104

New Jersey

Feb 23, 2014

#15

• Feb 23, 2014

• #15

jrichker said:

How far did you get into the Surging Idle Checklist? Did you read and check all of it or just bits and pieces? Checklist procedures are written so that you start at the top and work your way down to the bottom. Skip a step and you might miss just what you needed to find and fix your problem.

Click to expand...

I pretty much started from the top and worked my way down...I basically did the base idle reset and tps check list...didn't go thru the whole set up...I want to purchase a new TPS and IAC then I will re do the check list...