Hi, im new on here and i dont know if i posted at the right place so sorry I bought a 95 civic DX but the motor is a 2000 D16Y7. I ran a compression test and got about 185-190 on all 4 cylinder! My question is : When downshifting i dont feel the compression like it should but my test was 190 on all 4 so could it be that my test was wrong or could it be something else! You know the feeling when you downshift and you feel the car really slowing down? It almost doesnt do it except for third to second gear!

 

Test results sounds rather high. And how do you "feel" compression? That's a new one on me.

 

did you hold the throttle plate at WOT while performing the compression test?

 

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Sorry for the title thanks for fixing it! And yes while doing the test i had the gas wide open!! I have a check engine that just appeared so i will jump the connector and get the code!

 

Do you have an abnormally high idle speed?

 

Yes i do i dont have a rpm so i couldnt tell how high it idles but its high thats for sure!!

 

This would explain why you don't feel "compression" when downshifting. Set your idle speed to spec.

 

Is there any guide already made on how to set my idle speed to spec? Cause I have no idea how to do so Thanks

 

Pull the CEL code first.

 

I just went to park my civic behind my block and the CEL is gones O.o it appeared earlier when i floored it and now looks like it disappeared!! Weird!! So i guess i need to find how to set my idle to spec !

 

What ECU are you using?

 

I will go and look today i didnt check yet but is there a guide to put idle speed to spec or not?

 

Ok so the ECU in the car is a P2E.

 

Are any CEL codes thrown?

Any CEL codes? If so, post them.

Also check whether the throttle cable is adjusted too tightly. It should have about 1/2" of free play. Also check whether the throttle body is dirty, which can cause the throttle plate to become stuck partially open.

 

No CEL. And i will go and check the throttle body and throttle cable tomorrow its hard at night haha + winter sucks for car repair when you dont have a garage and i dont have a garage