fast ej22

aspro · Post by **aspro** » Mon Mar 13, 2006 1:06 pm

Just done an engine swap... ej22. Seem that the new donk wants to idle fast, it didnt before. Any suggestions on where to start?

bluesteel · Post by **bluesteel** » Mon Mar 13, 2006 2:35 pm

throttle cable not adjusted properly?
breather hoses?

also check for engine codes it might even tell you whats wrong

AlpineRaven · Post by **AlpineRaven** » Mon Mar 13, 2006 2:48 pm

or air leaks? Sometimes if you have an air leak it'll idle fast.. or um throttle cable needs adjusting?
Cheers
AP

AndrewT · Post by **AndrewT** » Mon Mar 13, 2006 3:12 pm

Mabey do a factory reset on the ECU (i think you leave the battery disconnected overnight?? somebody confirm?).
It might be having some slight issues with running a different engine now. (even tho they are the same model of engine theres bound to be some tiny differences in the sensor readings etc).

a.

BlackMale · Post by **BlackMale** » Mon Mar 13, 2006 4:09 pm

And if all that fails how much faster is faster?

AlpineRaven · Post by **AlpineRaven** » Mon Mar 13, 2006 4:51 pm

by the way.. what revs is it showing?
Cheers
AP

aspro · Post by **aspro** » Mon Mar 13, 2006 5:37 pm

by the way.. what revs is it showing?

Mmm good question, no tacho and i cant count that fast, my guess is that it is about 1000 to 1200 rpm

or air leaks? Sometimes if you have an air leak it'll idle fast.. or um throttle cable needs adjusting?

Air leaks.. i will investigate, throtle cable looks spot on.

Mabey do a factory reset on the ECU (i think you leave the battery disconnected overnight?? somebody confirm?).
It might be having some slight issues with running a different engine now. (even tho they are the same model of engine theres bound to be some tiny differences in the sensor readings etc).

I think tis maybe the case as when it was first started it seemed to hunt. started fast then went low.... picked up speed then settled at a nice rate.
The next time it started it was fast and seemed to stay that way.
I think perhaps the ecu is a little confused. I thought it would have settled though. I will try unplugging it again.

tim_81coupe · Post by **tim_81coupe** » Mon Mar 13, 2006 6:44 pm

No no no.... :P

An ECU reset won't do anything. A vaccuum leak is a possibility though.

Wind the little screw under the throttle linkage out a bit, see if that can lower it. Also, loosen the two screws on the bypass air controller and turn the unit a bit until the idle smoothens out. Sometimes that can give a fast idle too.

SuBaRiNo · Post by **SuBaRiNo** » Mon Mar 13, 2006 10:36 pm

I do recall Jays throttle body have an incorect idle adjustment on it. I know on mine and every other EJ throttle body i have looked at.... the top adjustment screw on the top of the throttle linkages... which appears to be the idle adjustment... in fact is not... and this screw should not be stopping the linkages returning to there rest point. I think that made sence. I know what i mean. Try that if u get me.

Dave

tim_81coupe · Post by **tim_81coupe** » Mon Mar 13, 2006 11:31 pm

The one that the base of the linkage rests against under return spring pressure is the idle adjustment.

Well it is on my EJ20G and on my EJ16.

SuBaRiNo · Post by **SuBaRiNo** » Tue Mar 14, 2006 8:28 am

Thats right... the one on top... is not.

Dave

aspro · Post by **aspro** » Tue Mar 14, 2006 11:45 pm

ah ha!, hadnt seen that lower screw. half a turn and now its where it should be. Thanks Tim.

tim_81coupe · Post by **tim_81coupe** » Wed Mar 15, 2006 12:17 am

No worries dude