Hello all

 

OK the car was doing the stalling thing when driven hard so I followed the instructions on the site to check the idle air valve. Took it off cleaned it with brake cleaner and degreaser, Dryed it and put it back on the car and now the idle bounces up and down and it mis fires like hell when driven????

 

Whats going on?? Please help????

Sure the hose clamps are back on securely and that no pipes are split?

Hello all

 

OK the car was doing the stalling thing when driven hard so I followed the instructions on the site to check the idle air valve. Took it off cleaned it with brake cleaner and degreaser, Dryed it and put it back on the car and now the idle bounces up and down and it mis fires like hell when driven????

 

Whats going on?? Please help????

you deffo put it back together properly?

 

also check to see if you put the connectors on correctly

Yep checked the clamps and hoses all good.

 

Its not that complicated. All you can do is remove the two small screws for the IACV and take it off the internals stay in the tube. I just gave it a blast of cleaner, let it dry and then put the O ring back in and back together again.

 

Is it cos my AEM was mapped and now the map is knackered cos the IACV is clean and working and allowing more air in??or something ?maybe?

 

Maybe the IACV is goosed properly after cleaning cos now when I disconnect it it doesnt seem to make a difference??

Maybe its jammed open? Remove and clean again would sort that. Sometimes the cleaner turns the dirt into a sticky mess which just causes the valve to stick completely. Only solution as I said is to remove and clean again, maybe leave soaking in petrol overnight..

OK ill give that a go will only take ten minuted to get it out as Im an expert now will be the third time today!

Also you will have to re-adjust the base idle once its back on. There's an FAQ on how to do it in the FAQ section :)

Is the TPS connected? Just a thought...

Thanks guys Ill give that a go. when you put it back on after cleaning would you expect the revs to bounce up and down or just be too low / too high? etc?

Dont know where is the TPS? I didnt remove it??

http://twinturbo.net/net/viewmsg.aspx?forum=technical&msg_id=920429

you will probably find some dirt in the valve sleeve, causing a partial blockage or the solenoid is fecked

If the valves are similar to most common types of ICVs, then after cleaning, it's worth squirting a drop of oil down there and running 12vs through it to actuate it and check its operation. Not sure what the Z32 ICVs are like to be honest as I've not taken mine off, so the above may not apply.

http://twinturbo.net/net/viewmsg.aspx?forum=technical&msg_id=920429

 

Thanks matey

 

Thats the thread I used to clean the bugger!!

TPS is on the passenger side throttle body, rectangular black box - sometimes the connector gets dislodged as you remove the idle valve feed pipe...

as si said remember it will need some light lube

Ill go and get it off again and clean it again. Mines different from the one in the thread above its has an open back and you can see the spring etc through the back. The one in the thread is closed.

Ok Its soaking in petrol now. Interestingly I just put a meter across the terminals on the Idle solenoid and no tone. Did the same with the Air con one and it gave me a tone. I then tried it across the terminals of the Air con connector and I had a tone but nothing across the terminals of the Idle connector. Im guessing that the AAC fat tube is bust. Or even worse the connector has a break in the wire somewhere? I hope not. Does anyone know where these terminate? I assume on the ECU but which wire? Ill see if i can trace it at the ecu and put the meter across it with a wire in each terminal on the connector to see if the cable is broke. Ordered a new loom from Z1 in the states looks like it could have been a good investment!