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idleing problem

im having a idleing problem. it will idle up to about 1500 to 2000 sometimes. iv been trying to get it stright but i dont know what would cause it? if anyone has any tips that would be grate thanks
[SIGPIC][/SIGPIC]
88 5.0L aod with duel flowmaster and speedo mod
88 5.0L H.O with 5 speed R.I.P
87 3.8L no trans. geting h.o and 5speed (project never ending thunder) started it as of 8-14-10
96 bronco xl 5.0L 5 speed man4x4
:birdsmily:

idleing problem

Reply #1 –
Vacuum lines, throttle position sensor, IAC... Run codes. The computer will tell you for us.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

idleing problem

Reply #2 –
its not a vac line it would do it all the time. i replaced them and i pulled the codes and all i get is an egr and the stuff for the emeition.
[SIGPIC][/SIGPIC]
88 5.0L aod with duel flowmaster and speedo mod
88 5.0L H.O with 5 speed R.I.P
87 3.8L no trans. geting h.o and 5speed (project never ending thunder) started it as of 8-14-10
96 bronco xl 5.0L 5 speed man4x4
:birdsmily:

idleing problem

Reply #3 –
next time it does it try pulling up on the gas pedal and see if it goes away.
"Beating the hell out of other peoples cars since 1999"
1983 Ford Thunderbird Heritage
1984 Ford Mustang GT Turbo Convertible
2015 Ford Focus SE 1.0 EcoBoost

idleing problem

Reply #4 –
Check your egr.  Make sure its not stuck open.
My car is a gravity hybrid.  The gasoline engine gets me up the hills, and gravity gets me down.

idleing problem

Reply #5 –
iv tryed pulling on it and did nothing and i did not know that the egr could have anything to do with it?
[SIGPIC][/SIGPIC]
88 5.0L aod with duel flowmaster and speedo mod
88 5.0L H.O with 5 speed R.I.P
87 3.8L no trans. geting h.o and 5speed (project never ending thunder) started it as of 8-14-10
96 bronco xl 5.0L 5 speed man4x4
:birdsmily:

idleing problem

Reply #6 –
Pulll the vac line off the top of the egr while the engine is running, see if that makes it go back to normal. If it does, check to make sure that line is fully intact, otherwise prolly time to replace the egr valve. If I know what I'm talking about anyway.

Mine runs pretty normal w/ or w/out it on, but the motor wont function if the line gets blocked, so if your egr valve is sticking or something to that effect, that should tell you.
--SteveN 👍
[thread=28690]1988 Cougar V6[/thread]
2012 F-150 3.7L

idleing problem

Reply #7 –
i pulled the egr off and its not geting stuck.
[SIGPIC][/SIGPIC]
88 5.0L aod with duel flowmaster and speedo mod
88 5.0L H.O with 5 speed R.I.P
87 3.8L no trans. geting h.o and 5speed (project never ending thunder) started it as of 8-14-10
96 bronco xl 5.0L 5 speed man4x4
:birdsmily:

idleing problem

Reply #8 –
This may sound silly, hae you checked your thermostat? I know not haing one or having one thats stuck open can cause a high idle problem in some cars
--SteveN 👍
[thread=28690]1988 Cougar V6[/thread]
2012 F-150 3.7L

idleing problem

Reply #9 –
when i pulled the motorr out i put a brand new one in
[SIGPIC][/SIGPIC]
88 5.0L aod with duel flowmaster and speedo mod
88 5.0L H.O with 5 speed R.I.P
87 3.8L no trans. geting h.o and 5speed (project never ending thunder) started it as of 8-14-10
96 bronco xl 5.0L 5 speed man4x4
:birdsmily:

idleing problem

Reply #10 –
What about your TPS and IAC?
--SteveN 👍
[thread=28690]1988 Cougar V6[/thread]
2012 F-150 3.7L

idleing problem

Reply #11 –
it has a new tps. is the iac the same of the bypass on the side of the throtle?
[SIGPIC][/SIGPIC]
88 5.0L aod with duel flowmaster and speedo mod
88 5.0L H.O with 5 speed R.I.P
87 3.8L no trans. geting h.o and 5speed (project never ending thunder) started it as of 8-14-10
96 bronco xl 5.0L 5 speed man4x4
:birdsmily:

idleing problem

Reply #12 –
Quote from: sarjxxx;320661
This may sound silly, hae you checked your thermostat? I know not haing one or having one thats stuck open can cause a high idle problem in some cars


I drove for almost 1 year with no thermostat. Well a lack of thermostat would be a better way to put it. Car never got over two bars on the digi dash. Old thermostat was rusted out and was dug out of the lower intake in pieces. The car would just always think its running cold, because it was. I don't see what that would do with high idle?
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

idleing problem

Reply #13 –
How were the emissions deleted? How far out is your idle screw? What is the voltage on the TPS? The IAC is right behind the throttle body on the front side of the motor.

To set idle, if your TPS voltage is good through all voltage ranges.

unplug battery for at least 10 minutes. start car, unplug IAC. set screw to desired RPM. If you cannot get it low enough, either the TPS is bad, or you have leaks(I have seen intake gaskets leak, spray carb cleaner or starting fluid to test for leaks.). Plug back in the IAC. If the motor dies, it is more likely then not the IAC.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

idleing problem

Reply #14 –
it dose not idle up high all the time. sometimes it will and sometimes it wont. dose not matter if its cold or hot out or rain or not. just dose it when it wants to. and what dose iac mean?
[SIGPIC][/SIGPIC]
88 5.0L aod with duel flowmaster and speedo mod
88 5.0L H.O with 5 speed R.I.P
87 3.8L no trans. geting h.o and 5speed (project never ending thunder) started it as of 8-14-10
96 bronco xl 5.0L 5 speed man4x4
:birdsmily: