i have a ej1 with a z6 motor. the idle bounces from 900-1600 after about a minute after start up til the car turns off. i changed the iac twice and changed the t/b. the top hole in the t/b has a leak, u can hear the air being sucked. if i cover the hole with my finger the idle goes normal also the car used to be auto now manuel and theres a auto p28. what could it be? thanks.


Modified by silverdcteg at 6:20 PM 4/26/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by silverdcteg &raquo;</TD></TR><TR><TD CLASS="quote">...the top hole in the t/b has a leak, u can hear the air being sucked. if i cover the hole with my finger the idle goes normal...</TD></TR></TABLE>

 

What he ^ is saying is that you have a vacuum leak. That is most certainly the cause of the hunting idle you describe.

My D16Y7 has a vacuum leak but it is a mistery.....

 

so what do i fix lol

 

Remove and clean the fast idle valve.

 

whats fast idle. i changed the iac twice nd did the cold start

 

 

i get what your saying but its the top hole we alerady did the cold star and turned it back or w.e

 

Isn't there a rubber seal(s) between the IACV and throttle body? Could a problem with that rubber seal be the source of your leak.

 

the iac is on the motor not the t/b but i tried two other iac's nd same problem.

 

Okay, what does the top hole of the TB serve? If it is the IACV, then look for a leak in the air passage way that connects the two.

Alternatively, is there possibly trapped air or a blockage in the IACV coolant hose that is preventing proper coolant flow through the IACV?

Finally, might you have a problem with the IACV circuit?


Modified by RonJ@HT at 1:39 AM 4/27/2008

 

goes to the iac but i couldnt have gotten 3 bad iacs. when i cover it the idle evens out like theres a leak there or something

 

See edited comments in my previous post.

 

get the right ecu, its not gonna run the way its supposed to with an auto ecu

 

motor was in my friends car nd it had the same problem. nd it did the same thing when i had a gsr ecu


Modified by silverdcteg at 3:11 PM 4/27/2008

 

still need help

 

I'm not sure if this will help but, you might want to try bleeding the coolant. That cured my idle bounce.

 

thanks but no help the motor went in the car nd all new fluids nd everything

 

help....