romelo1680

iTrader: (2)

hi i have an 85 gsle stock .i just got it and iam having so problem with the idle .when the car is warm the idle moves up & down . things that i checked .bac valve is working . adjusted the tps with the gauge with the 2 lights and now the green light is on. then i check the tps with an omh meter ....... close i got 1.27 open i got 5.42 . what to look for now

Druken

It could be that you have a minor vacuum leak, which is just enough to not make your car rev really high or die out.

85 FB

+1.

Check for broken/removed vacuum lines.

romelo1680

iTrader: (2)

i sparyed starter fluid on the motor it didnt rev up so how do you find a vac leak

Druken

Just making sure, you have a fire extinguisher with you right? And you are spraying with the engine on and in small doses right? Okay good.

Maybe it's just time to do a complete tune up. It could never hurt and plus you said you just got it. You never know when the previous owner changed the spark plugs, filters, etc.

thafox

sorry 2 hyjack but im kinda havin the same prob, but sometimes it'll idle steady for a while like prob 1hr or so then act up again

Druken

Well honestly, I've never really heard anyone keeping their car on, in idle, for an hour straight. Wouldn't this mess up the internals a bit? I know warming up the car is good, but an hour seem like way too long.
Thafox, does it idle fine during your daily driving, for example at a stop sign/etc? If it is, I don't think you really have a problem.

romelo1680

iTrader: (2)

any good infor. do i need to check the afm

romelo1680

iTrader: (2)

since the car is'nt obd 1 you can't use a scan tool on it so any infor would be helpful

85 FB

Druken, why would you need a fire extinguisher? I sprayed the crap out of my engine, 2 cans of starter fluid, when I was having an idle problem. Not one flame. And, letting your engine idle for an hour won't do anything to the internals.

romelo, it's not the AFM. Did you check the FAQ's about the surging idle problem on GSL-SE's?

Sterling

This could be either a clogged or faulty vacuum valve associated with the TPS. The valve controls the idle compensation system, and if it's leaking, you can have a minor fluctuation that should present itself as a rhythmic lope.

romelo1680

iTrader: (2)

no iam new to this forum i will check it thank you for your help

romelo1680

iTrader: (2)

hi sterling were is this vavle located at

85 FB

Romelo, give the FSM a try. It should also help you.

http://www.wankel.net/~krwright/cars/rx7/manuals.html

romelo1680

iTrader: (2)

okay thank you

Druken

Or it could be that the fuel filter needs replacing.

85 FB

A bad fuel filter wouldn't cause a fluctuating idle. It'd give poor accleration and fuel economy.

But, when you change out your fuel filter, tho, be sure to remove the rubber hose leading into the fuel pump and pull out the tiny cone screen filter. It'll be clogged with gunk.

Romelo, I've had my fair share of an idle problem on my GSL-SE. What RPM is the needle fluctuating to, back and forth, during idle?

Does the car stumble when you're decelerating while in gear?

romelo1680

iTrader: (2)

no

85 FB

You didn't answer my other question. In order for us to help you, you need to give us as much detailed information as possible. There's also a thread that focuses on that on the main page.

romelo1680

iTrader: (2)

the car don't stumble on deceleration. i dont drive it because i just got it and iam not real sure of it

85 FB

Again, you didn't answer my OTHER question.

romelo1680

iTrader: (2)

okay . from 1000 to about 400

85 FB

Give this link a try, see if it helps you any.

http://mrmazda.no-ip.com/gslseidle.html

Sterling

You simply have the idle mixture set incorrectly.

romelo1680

iTrader: (2)

what is that