'85GSL-SE

iTrader: (2)

Bear with me please.


This is the deal, I got the car knowing it has an idle issue. When I fist crank it in the morning with no pedal engagement before starting it will come up to 800RPM and stay there. Good Right! After I drive it for a mile the RPM's come up and stay at 1,200. Then they will make their way up to 1,500RPM's and/or come back down to 1,300. that is where they stay when idling from then on after the initial warm-up.

I went threw the GSL-SE troubleshooting guide http://www.nellump.net/peri/epi/firs...gslseIdle.html I followed it to the "T" and nothing is working.

1) I can press down on the TPS bolt with the spring and the idle will go down a tad or I can retard the ignition all the way and it will go to 1,000RPM's But it will then climb back up to 1,300 after driving around for abit.
2) The BAC/ASV work perfectly,
3) The Throttle Body is Clean and no carbon build-up,
4) The AFM is in good condition
5) The vacuum lines look to be good
5) The idle L/R mixture screw has never been touched. etc...
6) I have to have the Idle Air Adjust Screw screwed all the way in.
7) The throttle and Cruise Control cables are not to stiff.
8) The little itty bitty screw with the nut on it in front of the "G" on RE-EGI is adjusted to not hinder the linkage any.
9) I tried adjusting the screw in the ASV with the Black cover on it just as a last ditch effort but to no avail.

I opened up a vacuum line in the Dynamic Chamber and ran seafome threw the motor and then ran 4 gallons of distilled water threw it to see if that would help. It helped out on the power side but not the idle issue.

So since I couldn't find out what was causing the high idle I put the timing back to normal and the returned everything to the stock factory specs. I just don't get what it is. I am about to take the car to the Mazda Dealership and let them have at it or if someone knows or can help that would be great too!

Outside of the High Idle the car drives like a dream and has some serious power. I took my '86GXL and outran it getting on the highway with my Dad in the GXL and myself in the GSL-SE. It is just weird. But it does have a custom large exhaust on it. But everything is hooked up correctly, the Auxiliary Ports actuate when needed, I am just stumped.

Any extra incite that I may be overlooking? This thing is just driving me crazy. But I still love the car though.

djessence

Why did you put this in both the non tech and tech section??? seems a little silly

some more info dno if youve read it but might cover some stuff you havent already

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

https://www.rx7club.com/showthread.p...hreadid=235009

Did you try the spray starter fluid near vaccum lines and see if idle changes (does this even work with FI cars?)

just cuz the vacuum lines 'appear' good doesnt mean they all are

'85GSL-SE

iTrader: (2)

I had too many windows open( trying to diagnose this High Idle) and posted in the wrong area. That was my goof.

The first link you posted is the same one I believe as I looked threw earlier just on a different page.

The car has rebuilt Fuel Injectors put in by the previous owner.

I am scared to use starter fluid. The last Time I did that I caught my Jetta's engine bay on fire. I was spraying very sparingly. But the vacuum lines are squishy and flex easily though if that means anything.

WE3RX7

iTrader: (8)

The starter fluid trick does work well on FI cars. How you caught the jetta on fire I'm not sure...

How about grounds on the engine and trans? Dirty air filter? A/C dragging... alt going bad? Hmmm...

'85GSL-SE

iTrader: (2)

Tomorrow I will check out the grounds on the car and see how it looks, The Air Filter is brand new, the A/C isn't dragging, when I push the button for the A/C the car idles up a tad to 1,500 RPM's and blows cold. The Alt is putting out 14 Volts buy the gauge though. I will have it checked out tomorrow.

I'm telling you, Your like to want to pull your hair out trying to figure it out. Trust me.

85 FB

When I had an idle problem, I had the same hanging idle. Starter Fluid won't cause your engine to catch fire. I used it to diagnose my problem. I ended up having a bad seal around my intake manifold gaskets.

Did this idle problem get worse or has it always been like this ever since you got the car?

'85GSL-SE

iTrader: (2)

It has always had the High Idle like this. The engine was rebuilt 35K ago by the previous owners, owner. I did notice that some parts had that silicone sealant around them too. I will get a new gaskets for the LIM. What about the UIM?

I'm serious it caused a fire in my Jetta's engine bay. It just burned the fluid fumes and nothing else.

bugman1973

i had a similar problem i just adjusted my distributor and instant idle fix found out i had no vacuum leaks. try it see if it works

'85GSL-SE

iTrader: (2)

I turned the distributor and it lowered the idle alright to 1,000. Then once I drove it, it went back up again to 1,300 with no power so I put it back to it's previous spot.

85 FB

The intake manifold gaskets, LIM and UIM, shouldn't have gasket sealer on them.

'85GSL-SE

iTrader: (2)

There is sealer on both the UIM and LIM. When I was examining the engine I did notice that. Looks like I will be buying gaskets then and tearing the top of the motor apart.

'85GSL-SE

iTrader: (2)

Weird Update. I just did the 2GCDFIS upgrade and the idle sits instead of 13-1500 rpms now it is down to 1,050 and stays there rock steady. What do you think could have caused that to happen?

rearviewmirror

Good work.. I'm a new GSL-SE owner, please tell me what the 2GCDFIS upgrade is.

85 FB

^ Check the FAQ section.

IanS

iTrader: (4)

Come on now 85FB, evryone knows that 2GCDFIS means 2nd Generation Coil Direct Fire Ignition System. You could help the guy out instead of acting like Trochoid Jr...

85 FB

Actually, I just knew that you would come in and save the day. Y'know, coddle the newbs and pamper them instead of dealing them the truth. Wuss.

IanS

iTrader: (4)

I bet you get somehow uglier when you're angry...

Edit: Maybe cuter????

Edit 2: You suck Im goin home...

85 FB

You're hitting on me? ALREADY??? Geez, man, it was only a drink, not a date. I'm telling Wacky.

Hey! .....you promised you wouldn't kiss and tell.

sneezix

I would've just pointed him to the SEARCH tool, but I didn't know the answer, either, so
I was just waiting until someone answered him.

'85GSL-SE

iTrader: (2)

lol at the off topicness. but seriously. Could the wasted spark that it produces actually have calmed the idle down abit? It is interesting though.

If just doing 2GCDFIS helped that much I wonder about what the Transistor Trick would do. Is the TT kit or prebuilt kit even for sale anymore? When I was reading threw the archives and the threads on it, it was for sale. Just back in 2006.

85 FB

The 2nd Gen coil upgrade gives a smoother idle and acceleration, from what I've noticed and another new member has done as well. It shouldn't have jumped your idle up like that before. I'd say be on the safe side and replace those gaskets.

'85GSL-SE

iTrader: (2)

Oh I am still going to do that. The gaskets are on their way from Mazda both LIM and UIM. They should be here next week.

You guys are Kick-*** and great at help!

IanS

iTrader: (4)

Best bet to find out the current state of the TT is to contact GSLSE addict and he would know the most recent update about it. Ive tried the DLIDFIS and it smoothed out my idle and thats all I could tell. I since then upgraded to Blaster 2 coils (made by MSD) and have just left it that way since.

RW-7

iTrader: (56)

Check your timing with a light, especially ater doing the DLFIS. There could be a number of things causing your idle to be so high. First thing I would check, from what you mentioned above is your fast idle cam. This little buger won't engage at cold starts until you open the throttle. It may need adjusting. The other thing you might check is your hot start assist, just make sure nothing is keeping your throttle open. I was working on a car the other day that was surging from to much air. it turned out to be the cruse control cable. I used to live in Greensbobo btw, just off Springgarden.

Jeezus

iTrader: (4)

Greensboro is right across the street from me.