Another ze Idle issue.

[Kirk95gs]

Well I have read through so many treads it is not funny. I have tried multiple things. fixed some issues... but still something is up.

Heres what I have.

Curved neck ze. 95 mx-3 OBDI running kl36 ecu / je50

just finished my swap this morning. engine started up fine but had idle issue. had two small vac leaks on the back of the manifold. fixed the leakes. started the car again same problem. idle was hunting 1500-2500. So I jumped 10 grnd. set idle screw all the way down and turned up 3 full turs. set tps as in FAQ. started up and ran untill temp came up.. The idle stoped hunting but settled at 1500+ rpm's. so I ajusted idle screw all the way down and it settled at 1000rpm. Still to high. So I swaped my kl08 ecu back in to pull some codes.. start the car and it idled at 600 rpm. hmm.. well I pull the codes anyway. I got Code 16.. EGR.. well no S#!+ its not pluged in. So then I start the car again and run it. run the rpm's up to 4500 and back a couple times to see if it will settle back at 600 or so.. but it goes back up to 1500 and stays.. I pulled the k8 ecu out and put the kl36 ecu in.. still the same running at 1000rpm hit the gas and it stays up abou 1500.. play with it a bit and it drops down to 1000rpm..

Any help/info would be great.

[93MX3KLZE-T]

Check you tps, iac screw, and check agin for vac leaks.

[Kirk95gs]

I reinstalled the ze ecu did the tps / iac and it is running around 800-900.. the iac is still set all the way closed. from what I have read this will cause some issues. I have read that the screw should be anywhere from 2 -4 full turns open for normal operation. So this lead me to belive I still have a vac issues. I took the car out for a drive and it seems to not be running quite right.. There is something that is holding back the power. When ever I let off the throttle I can here the car whistle. So I started hunting again.. Found out that my Vacuum chamber had a cracked in it along with a bad check valve. so I will used the ones of the k8 to see it that works.

I am also running the same vac setup as it was on the k8 .. I have read in old post that this can cause some issues. So after some searching I found the proper Vaccum Diagram. I bought all new vac lines also. it was only $.08 a foot .. so I got 15.. I will run all new vac lines and change the chamber tomorrow .. I hope this solves this.

[smallblockman69]

LOL... that is some cheap vacuum line where did you get it?
also if that does not fix your problem i have has issues with the egr valve causing the same problem on a 626. to test it get a soda can, cut it open and use the aluminum to make a block off plate and use it to block off the egr valve. it works great for testing purposes

[Kirk95gs]

LOL... that is some cheap vacuum line where did you get it?
also if that does not fix your problem i have has issues with the egr valve causing the same problem on a 626. to test it get a soda can, cut it open and use the aluminum to make a block off plate and use it to block off the egr valve. it works great for testing purposes

I deleted my egr system. I got the vac line from from a auto shop that a friends works at.

I Pulled my intake manifold and pulled te thermo spacers and put a small amount of silicon gasket around the gaskets. did the egr plate on the back of the intake maifold the same along with anything else that could leak air. replaced all vac lines and ran a new vacuum setup off the klze diagram. car runns alot better but not 100%. My # 1 VIRS is no working also.. so I will use the one off my k8. other then that. I still can understad why my idle is so hard to controle.

[Smith18]

First off when you first start it take and loosen your distributor and turn it tell it runs not bad then give it a few revs to see if it sounds alright. Then set your idle and everything else after that. THEN once you have everything running not bad take and set your timing right with a timing light.

If your idle is hunting thats your TPS. Umm i don't know what else to say other then check over your vacuum lines and check if you have them all in the right place. Which vacuum diagram did you use?.

And why cant you get your idle down lower? it dies? or something when turning that screw lower? or what. It should go lower by turning the screw ?

The holding back power kind of feel when driving it:
i had the same thing before when i had my K8 ECU in and it would stumble under load and it would shift like crap. I chipped the ECU and it ran alot! better then it did, alot smoother idle and everything, i don't know how a kl31 makes the car run but you should of saved your $200 and just spent $40 and bought a Probinator chip.

[Kirk95gs]

First off when you first start it take and loosen your distributor and turn it tell it runs not bad then give it a few revs to see if it sounds alright. Then set your idle and everything else after that. THEN once you have everything running not bad take and set your timing right with a timing light.

I will try that. Thanks!

If your idle is hunting thats your TPS. Umm i don't know what else to say other then check over your vacuum lines and check if you have them all in the right place. Which vacuum diagram did you use?.

I used the klze vac diagram. I deleted the egr system.

http://images.geekazoids.net/vacuumklze_copy1.gif

And why cant you get your idle down lower? it dies? or something when turning that screw lower? or what. It should go lower by turning the screw ?

The screw is as low as it can go.

The holding back power kind of feel when driving it:
i had the same thing before when i had my K8 ECU in and it would stumble under load and it would shift like crap. I chipped the ECU and it ran alot! better then it did, alot smoother idle and everything, i don't know how a kl31 makes the car run but you should of saved your $200 and just spent $40 and bought a Probinator chip.

I was goin to use one of Ryan's chips but he didn't think it would work in my k8 ecu. So that is why I went with the kl36 ecu. I will run MS someday..

[Kirk95gs]

Should the car be in diag. mod while I adjust the dinisty?

[Smith18]

for setting the timing yes, but in my first comment no just turn it to see if it makes any difference in the idle and sorta try to get in its sweet spot then set your idle like you would normally.

And then go back and set your timing normally with a timing light and set your idle again while your at it lol i know it may sound like alot but its all worth it in the end.

[Kirk95gs]

Well I did what you said with the dinisty. At first the rpm's jumped up so then I back in off a little and it started hunting again. So I found a spot where it settled around 1000rpms shut the car down and put in dianostic mod. From there I reset the tps and IAC and got it down to 800-900 rpms. I'm happy with that.. Now the car is burping a bit when it idles. sometimes when I open the throtle up it will backfire. So this is telling me I have a timing issue now.

Befor I put the motor In I replaced my kl01 cams with kl31's , new timing belt & pulleys.. I used the walk through in the FAQ's and had all the marks bang on. Double and trippled checked by rotating the crank by hand a couple times and the marks all lined back up.

So that being said I am going to grab a timing gun on the way home and see what it looks like.

[Smith18]

Yeah i cant help you with the timing belt and all the marks you have to set it to, as im just doing that to my car right now. Kinda finding it hard to do the timing belt haha.

Yeh now just follow the procedure in the shop manual on how to set the timing, its quite easy .

and if that still doesn't work as it should then id say your timing marks are off or something, ill let the expertise help you with that one haha.

[Kirk95gs]

hey man thanks for the help. I will hope to have a gun by the weekend.. Couldnt find one today.. I will pull the cover and tripple check the marks.. it doesnt sound that bad at all. just once in a while it will hickup. LOL.. but today it snowed like 8" so I will have to wait untill I can take the car back out for another test run

I had some trouble with the timing marks. but once I got them all lined up and the belt on it was easy. I used a wrench on the cam pulleys to keep them on the marks.