new here, idle woes

knskit · February 11th, 2007, 10:55 PM

hi new to the forum, have a 91 , mods are, performer intake upper lower, 70 mm tb, e303, polished ported heads,bbk headers, decat exsuast, gutted smog, problem is the idle will surge when first started, goes away when warmed up, sometimes stalls, when i restart it it will surge for a few seconds then back to normal, anywho, i cleaned the new iac, checked for vac leaks, cleaned maf,no luck,the line from throttle body to valve cover is blocked at both ends,havent tested for codes yet, anyone have any suggestions

knskit · February 11th, 2007, 11:39 PM

ok fixed just had to reset computer, thnx anyways

knskit · February 12th, 2007, 12:26 AM

opened my big mouth, it worked good ,went for a spin turned off then problem started again

GTXRacing · February 12th, 2007, 03:28 PM

Yeah, move to a carb'd setup and get rid of that damn computer. All I need is a flathead, phillipshead and a rachet set and that's it. Kidding :wink

When I had my focus and ran into something just as similar, I just cleaned everything. I also cleaned the oxygen sensors too so you can try that as well.

knskit · February 12th, 2007, 05:01 PM

code 31 came up, cleaned the connectors and checked evrything, tested all parts, still no luck, wierd

shurb125 · February 12th, 2007, 05:33 PM

It may be worth your time to check the sensor on the MAF to make sure there is nothing on the the actual sensor tips. Very carefully clean of with a Q-tip if need be.

knskit · February 12th, 2007, 05:44 PM

been done

shurb125 · February 12th, 2007, 05:54 PM

Have you checked the EGR valve, the sensor that goes on the EGR valve, vaccum leaks, etc. I had a similar problem and ended up buying all new gaskets for the EGR, IAC, Thorttle body and egr spacer and nothing helped then checked for vaccum leakes and had one hose cracked under the front side of the plenum and that didn't help either, then replaced the EGR valve and the sensor and cleaned the IAC and the MAF sensor and pluged the battery back up and it ran fine after all that. Hope this helps I know it's frustrating.

knskit · February 12th, 2007, 06:14 PM

yes went to ford dealer and checked everything, i mean everything, all new iac, egr ,tps,o2 , all, new gaskets too, only surges when i start it then goes away, when i come to a lite its fine, only when first started, its like it searching then finds it but loses it when i restrt the car, absolutly no vac leaks

shurb125 · February 12th, 2007, 06:26 PM

So it just does it when you first start it up? Mine when I first start it up it idles around 1400 then 10-15 seconds it drops down to about 900. Is your start up idle really high?

cobraetti · February 12th, 2007, 07:39 PM

Mine too!. I have read that with an AOD tranny/computer ex.(A9P) will tend to idle higher on start-up. Mine (when cold) will tend to shoot up to 2500 and then slowly down to about 1100. When it is warm it is alot less,anyone with an AOD or A9P computer have the same issue?

knskit · February 12th, 2007, 09:23 PM

it goes up and down from around 1200 to 500 back to 1200 down to 500,levels out after 30 seconds or so, gradually gets better as it gets to 30 secs, then sits where it should at 850 ,900

knskit · February 13th, 2007, 11:10 PM

anybody have any suggestions, now it does it when i come to a stop sometimes stalls, its really pissing me off

knskit · February 14th, 2007, 04:00 AM

can someone verify code 31 for me? is it egr sensor, or 10 pin conectors?

bluedemon · February 14th, 2007, 08:04 AM

put a fuel pump in it

knskit · February 14th, 2007, 11:06 AM

it has an upgraded pump new with injectors

knskit · February 14th, 2007, 11:58 PM

ok so i re set and checked everything, iac,tbs, egr and sensor, pcv,maf, cleaned and checked all harness connections, cleaned throttlebody, intake, complete tune up,massive vacum leak test, made different gaskets with restrictions for the iac, no codes,pretty much everything i could do and still has a surge when started without giving it gas ? and when i stp in traffic,runs awsome otherwise is it too much to ask for, damn ford

TT86 · February 15th, 2007, 12:04 AM

knskit. I have the answer to your problem, I'm not sure what to call the part, but I have a small plate that mounts between the IAC and he throttle body that has 2 air screws in the sides that aloows more air to flow into the intake through the IAC. It allows adjustment to idle surge problems when you are running a cam/heads/intake etc. I'll get some pics up ASAP....

TT86 · February 15th, 2007, 12:21 AM

When i was running naturally aspirated with a stock ecu, I had IDENTICAL surge problems as you, I got this little gadget, and it helped 200%. Here are some pics of it. I bought it off EBAY for about 20 bones. It has a part# on it, and I'll give it to you, but I have NO IDEA who makes it, or where it came from.

The number that is stamped in the side is : F2PE-9F942-AA

TT86 · February 15th, 2007, 12:23 AM

I think I searched for PWM IAC on ebay.... I THINK!

or try PWM IAC....
Pulse Width Modified Idle Air Control

February 11th, 2007, 10:55 PM	#1
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	new here, idle woes hi new to the forum, have a 91 , mods are, performer intake upper lower, 70 mm tb, e303, polished ported heads,bbk headers, decat exsuast, gutted smog, problem is the idle will surge when first started, goes away when warmed up, sometimes stalls, when i restart it it will surge for a few seconds then back to normal, anywho, i cleaned the new iac, checked for vac leaks, cleaned maf,no luck,the line from throttle body to valve cover is blocked at both ends,havent tested for codes yet, anyone have any suggestions

February 12th, 2007, 03:28 PM	#4
GTXRacing Enthusiast Join Date: Apr 2006 Location: Greenville, Texas Posts: 733 iTrader: 0 reviews	Yeah, move to a carb'd setup and get rid of that damn computer. All I need is a flathead, phillipshead and a rachet set and that's it. Kidding :wink When I had my focus and ran into something just as similar, I just cleaned everything. I also cleaned the oxygen sensors too so you can try that as well. __________________ THE BEAST IS FOR SALE!!! GTX RACING & PERFORMACE CLUB OF TEXAS Meets and greets, drag racing and good eats, you know you want it. GTX Racing Tony P. 214-257-3635 http://www.moddedmustangs.com/forums...vehicle&CID=43

February 12th, 2007, 07:39 PM	#11
cobraetti Regular 2001 svt cobra no way (IRS) Join Date: Aug 2006 Location: goose creek,sc Posts: 304 iTrader: 0 reviews	Mine too!. I have read that with an AOD tranny/computer ex.(A9P) will tend to idle higher on start-up. Mine (when cold) will tend to shoot up to 2500 and then slowly down to about 1100. When it is warm it is alot less,anyone with an AOD or A9P computer have the same issue? __________________ Build #1249 MM New Edge Crew Member# 6

February 15th, 2007, 12:04 AM	#18
TT86 Regular Join Date: Feb 2007 Posts: 248 iTrader: 0 reviews	knskit. I have the answer to your problem, I'm not sure what to call the part, but I have a small plate that mounts between the IAC and he throttle body that has 2 air screws in the sides that aloows more air to flow into the intake through the IAC. It allows adjustment to idle surge problems when you are running a cam/heads/intake etc. I'll get some pics up ASAP.... __________________ 69 convertible: 302/ DART heads/Z303 cam/Vic Jr./ 650 DP Tremec w/ 4:10s 86 hatch: 302/ Edel Al. heads/ F303 cam/ twin Garret T3 turbos 10 psi intercooled 52# injectors MegaSquirt II EMS http://www.youtube.com/watch?v=_urWMgS_IRQ

February 15th, 2007, 12:21 AM	#19
TT86 Regular Join Date: Feb 2007 Posts: 248 iTrader: 0 reviews	When i was running naturally aspirated with a stock ecu, I had IDENTICAL surge problems as you, I got this little gadget, and it helped 200%. Here are some pics of it. I bought it off EBAY for about 20 bones. It has a part# on it, and I'll give it to you, but I have NO IDEA who makes it, or where it came from. The number that is stamped in the side is : F2PE-9F942-AA __________________ 69 convertible: 302/ DART heads/Z303 cam/Vic Jr./ 650 DP Tremec w/ 4:10s 86 hatch: 302/ Edel Al. heads/ F303 cam/ twin Garret T3 turbos 10 psi intercooled 52# injectors MegaSquirt II EMS http://www.youtube.com/watch?v=_urWMgS_IRQ

February 11th, 2007, 11:39 PM	#2
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	ok fixed just had to reset computer, thnx anyways

February 12th, 2007, 12:26 AM	#3
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	opened my big mouth, it worked good ,went for a spin turned off then problem started again

February 12th, 2007, 05:01 PM	#5
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	code 31 came up, cleaned the connectors and checked evrything, tested all parts, still no luck, wierd

February 12th, 2007, 05:33 PM	#6
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	It may be worth your time to check the sensor on the MAF to make sure there is nothing on the the actual sensor tips. Very carefully clean of with a Q-tip if need be.

February 12th, 2007, 05:44 PM	#7
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	been done

February 12th, 2007, 05:54 PM	#8
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	Have you checked the EGR valve, the sensor that goes on the EGR valve, vaccum leaks, etc. I had a similar problem and ended up buying all new gaskets for the EGR, IAC, Thorttle body and egr spacer and nothing helped then checked for vaccum leakes and had one hose cracked under the front side of the plenum and that didn't help either, then replaced the EGR valve and the sensor and cleaned the IAC and the MAF sensor and pluged the battery back up and it ran fine after all that. Hope this helps I know it's frustrating.

February 12th, 2007, 06:14 PM	#9
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	yes went to ford dealer and checked everything, i mean everything, all new iac, egr ,tps,o2 , all, new gaskets too, only surges when i start it then goes away, when i come to a lite its fine, only when first started, its like it searching then finds it but loses it when i restrt the car, absolutly no vac leaks

February 12th, 2007, 06:26 PM	#10
shurb125 Regular 1993 Mustang LX Vert Join Date: Nov 2006 Location: South Carolina Posts: 437 iTrader: 0 reviews	So it just does it when you first start it up? Mine when I first start it up it idles around 1400 then 10-15 seconds it drops down to about 900. Is your start up idle really high?

February 12th, 2007, 09:23 PM	#12
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	it goes up and down from around 1200 to 500 back to 1200 down to 500,levels out after 30 seconds or so, gradually gets better as it gets to 30 secs, then sits where it should at 850 ,900

February 13th, 2007, 11:10 PM	#13
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	anybody have any suggestions, now it does it when i come to a stop sometimes stalls, its really pissing me off

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February 14th, 2007, 04:00 AM	#14
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	can someone verify code 31 for me? is it egr sensor, or 10 pin conectors?

February 14th, 2007, 08:04 AM	#15
bluedemon Newbie Join Date: Jan 2007 Posts: 4 iTrader: 0 reviews	put a fuel pump in it

February 14th, 2007, 11:06 AM	#16
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	it has an upgraded pump new with injectors

February 14th, 2007, 11:58 PM	#17
knskit Newbie Join Date: Feb 2007 Posts: 24 iTrader: 0 reviews	ok so i re set and checked everything, iac,tbs, egr and sensor, pcv,maf, cleaned and checked all harness connections, cleaned throttlebody, intake, complete tune up,massive vacum leak test, made different gaskets with restrictions for the iac, no codes,pretty much everything i could do and still has a surge when started without giving it gas ? and when i stp in traffic,runs awsome otherwise is it too much to ask for, damn ford

February 15th, 2007, 12:23 AM	#20
TT86 Regular Join Date: Feb 2007 Posts: 248 iTrader: 0 reviews	I think I searched for PWM IAC on ebay.... I THINK! or try PWM IAC.... Pulse Width Modified Idle Air Control __________________ 69 convertible: 302/ DART heads/Z303 cam/Vic Jr./ 650 DP Tremec w/ 4:10s 86 hatch: 302/ Edel Al. heads/ F303 cam/ twin Garret T3 turbos 10 psi intercooled 52# injectors MegaSquirt II EMS http://www.youtube.com/watch?v=_urWMgS_IRQ

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