I feel like a noob for posting this up but it's happening more often these days.

During normal driving (hot or cold), sometimes my idle will settle at about 1500 RPMs. My gas pedal is not stuck - I check each time. It happens usually when I'm coming to a stoplight and put the clutch in -the tach just coasts down to 2500, 2000, 1500, then stays there. A quick blip on my accelerator seems to return it to normal idle every time (works the first time when I do that.

I'm not seeing any performance or safety issues with this but it's happening more often than ever before (noticed it years ago for the first time).

Any idea what this could be and how to remedy?

Thanks!

 

I know very little about the 22RE EFI setup but I'd suggest checking your TPS. It might have some weird intermittent issue affecting your idle, such as a dodgy connector.

 

Philbert - I have the exact same problem, and I'm glad you posted it. I have been trying to get mine to do it consistently so I can understand it better. Everytime it happens, a little blip to the throttle fixes it. I have adjusted my TPS, so I don't really suspect it right now. My IACV does not work ( I don't have a cold idle at all), so maybe they are related but I don't really see how. I originally thought it was the dashpot, so I removed it and still have the problem. So now I am down to 2 possible culprits:

1. Sticking accelerator cable, maybe it binds up somewhere inside the sheath.

2. Throttle body: I read another post about a guy who's throttle plate wouldn't quite close properly because I guess the neck of the TB was worn. I believe he replaced the whole TB.

Not sure what else it could be, truck runs great otherwise, just has this occasional sticky idle.

 

Thanks Cory -sounds like I'm not alone.

I have some graphite so maybe I'll try getting that into my throttel cable sheath and see if that helps.

Also been meaning to clean out my TB/intake anyway - is spraying carb cleaner into it and running it a bad thing to do? I've been reading up here on the Seafoam treatment too, which I may just do. I recall seeing some black stuff inside the intake mani when I tore things down for my timing chain job - looked like black crud/soot.

 

Phil

I think you want to be careful about spraying right into the TB, might be better to spray onto a rag and wipe. I'm going to get in there with an old tooth brush and make sure there is nothing making it stick. I did the Seafoam not too long ago, but it goes in after your throttle body, through a vac line, so it's not going to do anything for the TB. Good idea on the graphite, maybe I'll pick some up and try to get it into the sheath. Guess I haven't really checked to see if the gas pedal itself is binding up on anything, but I know it's not floor mats!

 

hello

i had the same thing going on with the throttle body..

what i did i got my throttle body cleaner with the red spray tube..

do you see the 4 metal vacuum on top of the throotle body spray the throttle body cleaner in those tubes.. only the 4 on top of the throttle body... mine where all the way blocked..

it fixed the problem.....

let me know if that work for you guys!

 

Gonna have to try that first I just assumed it was the tps because I pulled that code

 

hello again..

i forgot to tell you guys..

after i cleaned out those metal vacuum line ...

i dont get that dumb ass code 71!!!

thanks god..

code 71 is for the egr valve

 

did you find the solution to this problem?

 

I haven't yet had a chance to use Corey's advice- and the issue still exists

Will report back soon when I do try it out...PROMISE!

 

i had the same issue. had. i had capped off the reed/pair valve. once i put a filter back on in place of the cap, the idle became normal. that's my story, so i don't know if this is your case or not, but i hope it'll help

 

I'm keepin an eye on this one, cause my runner does this once in a while too..lol

 

thanks guys. My 91 just started this also. Will try the vacuum lines in the morning.

 

my 93 veezy started doing the exact same thing a couple weeks ago, feels like a sticky cable or something. a blip of the gas and she settles back to 1000rpm. subscribed....

 

found some graphite at the hardware store in town for only $3.80 for a pretty big bottle, maybe 4 oz I think? I was paying like $10 for a tiny bottle thru a gun parts supplier, what a ripoff....

 

if your getting a code 71 egr code

check the egr passage right behide the throttle body in side on the top left.

 

Might want to check your dash pot as well. If it gets clogged it can cause these same problems.

 

X2 on the dash pot, they can get sticky, I have put some all in one oil on the part of the dash pot that comes into contact with the plunger or what ever you call it...haven't had any problems since

 

how does the dashpot get clogged?

 

just engine dirt and grease in general. i haven't cleaned mine, and i don't think it ever has been, yet it works just fine. it's easy enough to take apart to look at. there's a "lid" opposite the throttle contact that you pry off. the filter is in there