Idles at higher rpm... sometimes
03-03-2012, 05:39 PM
#1
MFz Regular
Thread Starter
Join Date: Feb 2012
Location: royal oak mi
Posts: 111
Idles at higher rpm... sometimes
So i dunno if this should be here or in the turbo section but here goes. Sometimes my miata idles as it should and other times is wants to idle at like 1250rpms. No rhyme or reason as far as i can tell. Hot cold doesnt matter. Ive got a turbo on it with some piping going on but i know for sure its not a vacuum or charge pipe leak cus ive fixed all thoes already. Just wondering if anyone has run into this.. im leaning twords the iac valve.. anyone have any problems that were similar related to the iac valve or maybe the maf? Oh its a 91 1.6l. It almost seems as if the iac isnt getting good coolant flow or whatever thermostatic component thats in it is sticking. Wish i could hook my scan tool to it but its too old and foriegn.
03-03-2012, 05:48 PM
#2
Red To Go
Join Date: Jul 2011
Location: Canton, MI
Posts: 2,600
So i dunno if this should be here or in the turbo section but here goes. Sometimes my miata idles as it should and other times is wants to idle at like 1250rpms. No rhyme or reason as far as i can tell. Hot cold doesnt matter. Ive got a turbo on it with some piping going on but i know for sure its not a vacuum or charge pipe leak cus ive fixed all thoes already. Just wondering if anyone has run into this.. im leaning twords the iac valve.. anyone have any problems that were similar related to the iac valve or maybe the maf? Oh its a 91 1.6l. It almost seems as if the iac isnt getting good coolant flow or whatever thermostatic component thats in it is sticking. Wish i could hook my scan tool to it but its too old and foriegn.
ps you dont need to make the led thing they will flash on the check engine light.
Last edited by RedTurboMiata; 03-03-2012 at 05:51 PM.
03-03-2012, 05:56 PM
#3
MFz Regular
Thread Starter
Join Date: Feb 2012
Location: royal oak mi
Posts: 111
Yes i have the iac feeding from the charge pipe right before the throttle body. Also no check engine.. I was just saying if it was newer obdII ive got multiple scan tools i could take live readings with and actually control what the iac is doing, but being obd nothing im having a hard time figuring out what exactly is going on.
03-04-2012, 11:02 AM
#6
Red To Go
Join Date: Jul 2011
Location: Canton, MI
Posts: 2,600
yea mine is the same way, but that should help. oh and the t at the bottom of the thermostat can get clogged, and dont forget the piece on the side of the intake manifold.
03-05-2012, 05:40 PM
#8
MFz Regular
Thread Starter
Join Date: Feb 2012
Location: royal oak mi
Posts: 111
Funny i was thinking the same thing on the way home today when i was also noticing what crap gas milage ive been getting... although ive been boostin quite a bit with the new turbo.. ill have to check it with the power probe tomorrow...
I hope thats it, its easy to check and easy to change...
I hope thats it, its easy to check and easy to change...