92 7mge idle issues
 

hi, my supra N/A has issues when idling, sometimes it will idle at 1500rpms and sometimes it will struggle to idle at all.. any ideas? the car runs fine while driving

any help guys?

might be a vacuum leak. do a search for the symptoms your having and see what that turns up.

check for codes first.

thanks:) gonna hopefully run codes on it soon, gotta find time for that though;) I just dont want it to be the Idle air control valve... those things get pricey

the ISC(idle control) is easy to check

it should make a few clicks right after shuting the engine down at least thats what the toyota manual says

tStart with checking for error codes (see the FAQS), then check the TPS calibration and then the ISCV. That's the order I'd approach it in.

Can't put it much better than that, and if the ISCV does turn out to be the prob. it's not always doom & gloom. A fair proportion of the time they're just glued up with old oil & crud & a good clean with brake cleaner spray can sort 'em... ;) For my money though if it's intermittent I'd suspect the TPS (bet the EML comes on when it won't idle, if it works! next time it won't idle do the diag. check before touching the throttle again & see if you get a code 51...)

well ran the codes.. codes 41 and 51... TPS and air conditioner switch lol.. getting the TPS tomorrow:) cant find anything in my book about the switch though.. but better to fix mechanical issues first:)

DON'T GO & BUY a TPS!!!! All the code 51 means 9 times out of 10 is you need to calibrate it as per cre's link! (click next page for info on the actual calibration process after ensuring your vacuum pipes are as they should be...) I should have been more clear really & said I'd suspect the TPS calibration rather than saying just the TPS, sorry that's what rushing to finish a post before dinner does to you! :)