idles crazy some times

86ttops · October 11th, 2007, 01:30 AM

K my 86 5.0 has been sitting for 3 years i go out and start it atleast once a mounth some times it will idle high and i try to kick it down and it goes higher some times its fine i put a new tps on it before i parkedi was driving it and it stuck at 4000 rpm and it was fine after that any sugestions map maybe ?

Tony_90fox · October 11th, 2007, 01:32 AM

IAC? Check all the vacuum hoses and look for leaks?

86ttops · October 11th, 2007, 01:40 AM

dont think its vacum doesnt do it all the time

patwrecked · October 11th, 2007, 02:00 AM

check the linkage uder the throttle body, make sure it isnt caught on anything. loosen the nut that sits behind the spring in the throttle cable( underneath the tb), not the idle set screw. if all else loosen mess around with the idle set screw with the engine running. also lubricate all the linkage.

patwrecked · October 11th, 2007, 02:01 AM

it may also be the iac but i doubt it.

patwrecked · October 11th, 2007, 02:05 AM

then again if the iac is the origional, then buy a new one. they list for like $90, but u can get then way cheaper at kragens. its all the same crap.

TENGRAM · October 11th, 2007, 03:00 AM

linkage is catching on something or the TB blade is getting stuck open. otherwise it is likely that you have an intermittant open in your TPS wiring. Check for Codes to find out if its the TPS wiring.

i'm doubting it is the IAC because, although it can make your idle stick high (2k rpm), it does not have the ability to raise it that much (4k rpm). keep us updated

Speedstang302 · October 11th, 2007, 09:37 AM

i had the same problem, wd40 on the throttle linkage and never had the problems again..

86ttops · October 11th, 2007, 11:25 AM

There are no codes and its not the linkadge blade is closed i have mass air and a9l for it but dont want to put it on untill i get this fixed

ryans88gt · October 11th, 2007, 12:33 PM

I have no idea how your car can idle at 4000 rpms unless you have a massive vacuum leak or your throttle blade is getting hung up.

Even if you IAC was stuck all the way open it wouldn't idle up to 4000.

It has to be getting air from somewhere to idle that high...

nolife · October 11th, 2007, 12:39 PM

A mouse stuck in the throttle plate? My car that sits for long periods gets them all of the time, besides the air box, they seem to like the area between the upper and lower manifold. Have not found any in the actual intake through. That would suck... literally.

95opal · October 11th, 2007, 04:56 PM

Originally Posted by ryans88gt

I have no idea how your car can idle at 4000 rpms unless you have a massive vacuum leak or your throttle blade is getting hung up.

Even if you IAC was stuck all the way open it wouldn't idle up to 4000.

It has to be getting air from somewhere to idle that high...

+1

TENGRAM · October 11th, 2007, 05:15 PM

Originally Posted by 86ttops

There are no codes and its not the linkadge blade is closed i have mass air and a9l for it but dont want to put it on untill i get this fixed

so you checked codes and got a code 11 (meaning everything is ok) for the first three tests and a 9 (meaning all cylinders are functioning identically) for the cylinder balance test?

FYI, just because your CEL isn't on does not mean there are no codes... with it idling at 4k rpm there will be codes, i guarantee it.

86ttops · October 12th, 2007, 01:12 PM

Originally Posted by ryans88gt

I have no idea how your car can idle at 4000 rpms unless you have a massive vacuum leak or your throttle blade is getting hung up.

Even if you IAC was stuck all the way open it wouldn't idle up to 4000.

It has to be getting air from somewhere to idle that high...

It wasnt at 4000 rpm just high like 1200 or so

86ttops · October 12th, 2007, 01:13 PM

Originally Posted by TENGRAM

Originally Posted by 86ttops

There are no codes and its not the linkadge blade is closed i have mass air and a9l for it but dont want to put it on untill i get this fixed

so you checked codes and got a code 11 (meaning everything is ok) for the first three tests and a 9 (meaning all cylinders are functioning identically) for the cylinder balance test?

FYI, just because your CEL isn't on does not mean there are no codes... with it idling at 4k rpm there will be codes, i guarantee it.

My buddy ran them for me and all he came up with was a bad temp sensor I cnat test it when it is doing it the high rpms are not good on the motor

ryans88gt · October 12th, 2007, 05:02 PM

Originally Posted by 86ttops

it stuck at 4000 rpm

Originally Posted by 86ttops

It wasnt at 4000 rpm just high like 1200 or so

Speedstang302 · October 12th, 2007, 10:00 PM

Originally Posted by ryans88gt

Originally Posted by 86ttops

it stuck at 4000 rpm

Originally Posted by 86ttops

It wasnt at 4000 rpm just high like 1200 or so

Y....E......A.....H??????? :homo

86ttops · October 13th, 2007, 10:50 PM

Originally Posted by 86ttops

i put a new tps on it before i parkedi was driving it and it stuck at 4000 rpm and it was fine after that any sugestions map maybe ?

That was befor e changed the tps now its like up too 2500

October 11th, 2007, 01:30 AM	#1
86ttops Hardcore Enthusiast 86,97 mustang gt t tops n/a Join Date: Aug 2007 Location: decatur il Posts: 1,287 iTrader: 0 reviews	idles crazy some times K my 86 5.0 has been sitting for 3 years i go out and start it atleast once a mounth some times it will idle high and i try to kick it down and it goes higher some times its fine i put a new tps on it before i parkedi was driving it and it stuck at 4000 rpm and it was fine after that any sugestions map maybe ?

October 11th, 2007, 01:32 AM	#2
Tony_90fox Banned Join Date: Jun 2006 Location: Bowling Green, KY Posts: 3,803 iTrader: 0 reviews	IAC? Check all the vacuum hoses and look for leaks? __________________ [SIGPIC][/SIGPIC] [B][U]MM Sapper Squad[/U][/B] [QUOTE=Regency 2007;1676187]MSO's stupidity has never stopped amazing me since the day he joined this forum.[/QUOTE]

October 11th, 2007, 03:00 AM	#7
TENGRAM Hardcore Enthusiast Join Date: Jun 2006 Posts: 1,027 iTrader: 0 reviews	linkage is catching on something or the TB blade is getting stuck open. otherwise it is likely that you have an intermittant open in your TPS wiring. Check for Codes to find out if its the TPS wiring. i'm doubting it is the IAC because, although it can make your idle stick high (2k rpm), it does not have the ability to raise it that much (4k rpm). keep us updated __________________ 89 GT t5 3.73 www.my5oh.com/

October 11th, 2007, 09:37 AM	#8
Speedstang302 I Post Entirely Way Too Much 1996 Mustang GT 13.64@101mph Join Date: Apr 2007 Location: Massachusetss Posts: 5,828 iTrader: 1 reviews	i had the same problem, wd40 on the throttle linkage and never had the problems again.. __________________ 1990 GT- GT40p Heads\| Anderson N41 cam\| Crane 1.6 RR's\| Trickflow Intake\|MGW Short Throw\| Aluminum d/s\| 3.73's.....still slow....

October 11th, 2007, 12:33 PM	#10
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	I have no idea how your car can idle at 4000 rpms unless you have a massive vacuum leak or your throttle blade is getting hung up. Even if you IAC was stuck all the way open it wouldn't idle up to 4000. It has to be getting air from somewhere to idle that high... __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

idles crazy some times

idles crazy some times

Re: idles crazy some times

Re: idles crazy some times

Re: idles crazy some times

October 11th, 2007, 01:40 AM	#3
86ttops Hardcore Enthusiast 86,97 mustang gt t tops n/a Join Date: Aug 2007 Location: decatur il Posts: 1,287 iTrader: 0 reviews	dont think its vacum doesnt do it all the time

October 11th, 2007, 02:00 AM	#4
patwrecked Regular Join Date: Feb 2007 Posts: 339 iTrader: 0 reviews	check the linkage uder the throttle body, make sure it isnt caught on anything. loosen the nut that sits behind the spring in the throttle cable( underneath the tb), not the idle set screw. if all else loosen mess around with the idle set screw with the engine running. also lubricate all the linkage.

October 11th, 2007, 02:01 AM	#5
patwrecked Regular Join Date: Feb 2007 Posts: 339 iTrader: 0 reviews	it may also be the iac but i doubt it.

October 11th, 2007, 02:05 AM	#6
patwrecked Regular Join Date: Feb 2007 Posts: 339 iTrader: 0 reviews	then again if the iac is the origional, then buy a new one. they list for like $90, but u can get then way cheaper at kragens. its all the same crap.

October 11th, 2007, 11:25 AM	#9
86ttops Hardcore Enthusiast 86,97 mustang gt t tops n/a Join Date: Aug 2007 Location: decatur il Posts: 1,287 iTrader: 0 reviews	There are no codes and its not the linkadge blade is closed i have mass air and a9l for it but dont want to put it on untill i get this fixed

October 11th, 2007, 12:39 PM	#11
nolife MM Fanatic 91GT, 88GT, 02GT Join Date: Dec 2006 Posts: 3,057 Blog Entries: 3 iTrader: 0 reviews	A mouse stuck in the throttle plate? My car that sits for long periods gets them all of the time, besides the air box, they seem to like the area between the upper and lower manifold. Have not found any in the actual intake through. That would suck... literally. __________________

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