truck has problem finding idle speed.

[5.0Flareside]

As the title says my truck almost seems to have a problem find what idle speed it wants to run at when i first start the truck up cold. it sits there and idles up and down and up and down for bout 30 seconds and a couple of downs it sometimes dies or comes close. Is it like i'm thinking the IAC valve going bad or just dirty or what?

 

[5.0Flareside]

bumpidy bump.

 

[surewhynot]

I saw your post, but the only thin I know about efi is how to tear it off and go with a carb. Chris is on now, he might know.

 

[Skandocious]

I'd start with cleaning the IAC-- it's free and easy (down the road I go... sorry I couldn't help myself ). I've heard of it fixing problems like that before.

 

[5.0Flareside]

thats what i was figuring was the IAC was dirty. my dads was completely a lost cause in his 95 302 when he changed his he would rev it up to 3k rpms and when it came back down it would die. but mine it just acts like its gonna die. so whats the best way to clean it? ive heard carb cleaner but any other cleaners as i dont have the money right now to go get some carb cleaner.

 

[Skandocious]

Any petrol based solvent like carb cleaner should work-- my weapon of choice is always Brakleen brake parts cleaner, because we've always got it around. You could also probably use some kerosene.

 

[5.0Flareside]

what is petrol based? would like wd 40 work? lol.

 

[Skandocious]

WD40 is a penetrant not a solvent. It might blow out some of the junk in there but it's not made for the job. You don't have any automotive solvents?

 

[5.0Flareside]

not at my house. at my friends shop i do. well i might here. ill have to look and see.

 

[1985 Ford F-150]

Gas would work too.

 

[5.0Flareside]

nevermind i remembered i had some carb cleaner out in the shed. im letting my truck cool back off before i do it. i was driving just a couple of minutes ago.

 

[5.0Flareside]

daaaayyyyyyuuuummmmmmmmmmm i just sprayed the carb cleaner in the IAC a dirt and grime came flying out like it was attacking me it was so dirty. and im gonna also while im at it clean off the intake portion. it wont hurt anything if i spray it in the intake will it?

 

[1985 Ford F-150]

Nope not a bit. Clean the throttle body butterflies off while your in there.

 

[5.0Flareside]

i didnt figure it would hurt anything. well looks like im pullin the intake tubes off to get to the rest of the intake. lol. i didnt expect to get in there and do this but oh well if it makes my truck scream even more im all for it.

 

[1985 Ford F-150]

Yeah itll definitly help it.

 

[5.0Flareside]

hell the truck when warmed up screams like a bat outa hades. im almost done cleaning the IAC. im getting it real good.

 

[5.0Flareside]

oh wow. i just put everything back together and man its running smooth as silk.

 

[Mil1ion]

Next time get the codes it's throwing so we know exactly what to attack

 

[5.0Flareside]

it wasnt throwing any codes. but i just took it for a drive. man was it a difference. so much smoother more throttle response. a tiny bit more power.

 

[LEB Ben]

it wasnt throwing any codes. but i just took it for a drive. man was it a difference. so much smoother more throttle response. a tiny bit more power.

Glad everything went well. I hate those IAC problems...more of an annoyance than anything.