Surging idle 88gt maf conv

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newbee90gt

New Member

Aug 24, 2003

32

0

0

Oceanside,Ca

Feb 21, 2004

#1

• Feb 21, 2004

• #1

okies did the conversion to mass air and now i have a surding idle any takers????? 600 rpm to about a grand....

 

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PuppyDawg

New Member

Nov 20, 2003

197

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0

Boston,MA

Feb 21, 2004

#2

• Feb 21, 2004

• #2

i have the same problem still *pouts* .... but i never did the converstion....it was already done when i bought the 88gt....any suggestions?

 

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newbee90gt

New Member

Aug 24, 2003

32

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0

Oceanside,Ca

Feb 21, 2004

#3

• Feb 21, 2004

• #3

come on any help?

 

5.0's 4 ever

The #1 Stunna

Founding Member

Jan 22, 2000

5,794

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76

Orlando, FL

Feb 21, 2004

#4

• Feb 21, 2004

• #4

How long has it been since you finished the conversion? When I did my MAF conversion to my 88 about three years ago it took the car probably around 3-4 days for the PCM to learn. At first mine did not want to idle and would stall pretty often. I then added a idle control plate that ford makes. It goes between the IAC and the throttle body and you can set your idle with adjustments of two screws. In the matter of a couple days of driving the car ran perfect, no more stalling and a nice smooth idle.

 

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PuppyDawg

New Member

Nov 20, 2003

197

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0

Boston,MA

Feb 21, 2004

#5

• Feb 21, 2004

• #5

i guess my problem has nothing to do with the MAF conversion at all seeing that i had this car for a couple of months now and it still surges.....it's so frustrating....i changed the distributor cap and rotor wires plugs......did a compression check....and what's weird is when i first start him up.....It's nice and fine.....idles smoothly and everything......and then a lil later (a minute or 2) it starts to surge like crazy....WTF?

 

BlackFox5.0

Founding Member

Aug 7, 2000

3,514

1

0

Massachusetts

Feb 21, 2004

#6

• Feb 21, 2004

• #6

Vacuum leak?

Have you reset the computer? If not then discconect the Positive (+) side of the battery for about an hour (to be safe) then plug it back in, and let it idle, then go for a normal (going easy on the gas) drive, and let it idle again for a little bit. This will let the computer re-learn the fuel curves again and such.

 

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PuppyDawg

New Member

Nov 20, 2003

197

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0

Boston,MA

Feb 21, 2004

#7

• Feb 21, 2004

• #7

BlackFox5.0 said:

Vacuum leak?

Have you reset the computer? If not then discconect the Positive (+) side of the battery for about an hour (to be safe) then plug it back in, and let it idle, then go for a normal (going easy on the gas) drive, and let it idle again for a little bit. This will let the computer re-learn the fuel curves again and such.

Click to expand...

*pouts* yea unfotunately i failed to info you that process has been done as well *pouts*.....awwwwww shucks!....do you know what else i can try? thanks for the info though.....really appreciate it.

 

88GTStreetRod

Member

Jan 5, 2004

376

1

18

USA

Feb 21, 2004

#8

• Feb 21, 2004

• #8

Disconect the battery, let sit for about 30 minutes disconected. Make sure mass air is calibrated for injectors, may take a couple of hours for the computer to calibrate if its is a A9L or Z3X. Sometime clocking the meter 90 degrees helps. Do you know what computer you have?

newbee90gt said:

okies did the conversion to mass air and now i have a surding idle any takers????? 600 rpm to about a grand....

Click to expand...

 

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StonysGT

Founding Member

Jun 10, 2002

220

0

0

winamac, Indiana

Feb 21, 2004

#9

• Feb 21, 2004

• #9

not to sound like a smart ars but what about the obvious stuff like tps sensor or some carbon build up in the throttle body. they are bad about that.

 

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newbee90gt

New Member

Aug 24, 2003

32

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0

Oceanside,Ca

Feb 21, 2004

#10

• Feb 21, 2004

• #10

i' cleaned just about everything, and done the battery disconnect. it surges in the beginning and smoothes out after a min but still continues to surge , however if you unplug the timing plug it runs fine. will it hurt if it doesnt have that pluged in?

 

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StonysGT

Founding Member

Jun 10, 2002

220

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0

winamac, Indiana

Feb 21, 2004

#11

• Feb 21, 2004

• #11

if you do that your timing wont advance when giving it a load going down the road if its what im thinking your talkin about

 

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StonysGT

Founding Member

Jun 10, 2002

220

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0

winamac, Indiana

Feb 21, 2004

#12

• Feb 21, 2004

• #12

what about that module on the distributor that likes to go out. just guessing

 

CRASH7772

Member

Apr 27, 2003

401

1

16

NH

Feb 22, 2004

#13

• Feb 22, 2004

• #13

Anybody running non-cruise control cars? I've heard if you don't put the dsm switch (digital speed managment....I think that's what it was called) you will have problems. There was some acrticles on conversions about this....just don't remember links. I'm really dreading converting mine, I've had the parts 8 months now.

 

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92streetstang

Founding Member

Jun 25, 2002

64

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6

Feb 22, 2004

#14

• Feb 22, 2004

• #14

I don't think it would be the module on the distributer the Ignition Control Module, mine went bad and car just wouldn't start. You said u clean everything but i tend to think its the Idle Air Control. Mine sticks a lil seems like in winter its worst. just my 2 cents