whats the deal here? i know that many people on this forum are posting as we speak trying to figure out their idling problem with their FC. why do these cars have such a problem idling correctly? i bought my T2 about a month ago and the sum'bitch hasn't idled correctly (seldom ran correctly) since i bought it. lets here some input about this my nigs.

 

Well my N/A has 200k miles on it and idles perfect all the time. I hope I can say the same about my TII when i have it up and running.... Maybe its a TII thing. I am sure you have done a really good check for vacuum leaks right?

And a full tune up. Filters, plugs, wires, Etc.

 

Number of reasons: Injector Issues, Timing Issues, TPS misadjusted or broken, AFM stuck/reading incorrectly, AWS malfunctioning (cold start), vacuum leaks, incorrectly routed vacuum lines, and the list goes on and on, anyone else care to add more?

 

amen to the "injector issues"

 

I've been fighting with idle issues on my S5 T2 for quite some time now, but I've tracked it down to a fault AFM, go figure :/

 

Never had an Idle problem with my FC... We'll see what happens once I get the turbo in it though

 

ive had 3 fc's and always been able to correct the idle issues ....always remember that a high mileage car will have stuff wear out ......i had one that the throttle cable was the problem for the high idle !

 

My '86 base idles fine and always has. Even though there's no ACV and TII injectors w/FD fuel pump, no problems.

My '79 beater idles fine

Hell, even my '86 parts car idled perfectly after I got it running.

I would suspect that most people's idle problems are caused by old leaking vacuum hose, and/or misadjusted TPSs.

 

me too and i kept adjusting the tps screw and it never worked.

 

Um, did you adjust the TPS correctly? "Screwing" with the screw will do nothing to help.

 

yeah i have the led lights to test the sensor and if u turn that screw even a little it will raise ur idle or lower it a little

 

Red lights are useless. Use an ohmmeter and adjust for 1K at closed throttle. Be sure to get the car NICE and WARM before this.

 

i tried the ohm reader for making my FCD and that thing was complicated. after about a hour of screwing w/ it i finally got it right

 

What's so complicated about it? Connect probes, turn meter on, take reading.

 

Doesn't always solve the problem, especially if your AFM is broke

 

I adjusted my Idle, using the Ohm Meter, while the the Ignition was on the "On" position. Ofcourse after the car was warmed up.

 

The ohm meter method should ONLY be used with the engine OFF.

 

why is idle such a problem?

Japanese cars have real mickey-mouse solutions for idle control, depending on both computer-controlled and mechanically-controlled mechanisms to obtain the right idle speed for given conditions. Any time you try to make mechanical and electronic controls work together towards the same goal, things go haywire easily because the electronics have to assume the mechanical stuff is working properly.

 

like i said, never used it to adjust idle. only used one when making my FCD

 

how can i find out if my AFM is working correctly?

 

the idle on my car isn´t that bad

it has a little miss every now and then but I have never seen a rx-7 that doesn´t

plugs are good TPS might be off a little but I doubt it
wires, and injectors I think are my issue

at one point I was having flooding issues if I let the car sit too long so again that leads me to believe the injectors..

 

what all is actually needed by the engine to control idle. can i remove any **** from the engine bay to simplify things? this idle **** is really getting to me. there are good-lookin girls around, and we are sitting there and my car is liek, 'vroom vr vr vrimm put vroom sputter sputter vroom put vroom put vroom' it aint good.

 

Common intake leaks on a tII;

Lower TID hose connecting to turbo

Small hose running from aluminum "splitter" above turbo. The hose runs from splitter to BAC valve.


Found both these to be cracked on my car.

TPS adjustment is tough when engine is hot...
Easy to do when engine is cold. Just disengage the high "cold" idle stuff and the trottle closes to the "hot" possition. Then you adjust your tps as the book says.

 

The major problem is the people who fiddle with the idle system,not the idle system itself.
Four RX-7s over 10 years and one idle problem(on a car which had a j-spec motor installed by a Mazda dealer).
My 10th AE is going on 35,000km without any trouble or adjustment.
I have only used a Mazda light tool for adjustment and it works every time(for TPS adjustment).
The absolute best way to adjust the TPS is to measure the voltage output from it at the ecu(HAILERS has written extensively about this in the past).

 

"The major problem is the people who fiddle with the idle system,not the idle system itself."
umm.. what exactly does that mean. the canadians have a weird way of wording things eh.