97sohc_d00d

Okay i have a 97 ek hatch with a y7 block and z6 head...since the swap i have been having tons of issues with the performance of the engine. I have it timed at tdc head and block with adjustable cam gear...my issue is it doesnt want to idle above 500rpms then it wants to drop and shut off on me i have messed with the ignition timing a thousand times and cannot seem to figure out why it wants to idle so low... if i drive it its okay once i get up to 3000rpms then it will drive fine. Any help would be greatly appreciated

EJ8_Man

Sounds like your IACV is not functioning correctly. Have you tried cleaning the throttle body and IACV?

Former User

P28 ECU? What's the need for an adjustable cam gear?

Use a timing gun to set the ignition timing to spec with the service connector jumped and a friend holding down the throttle pedal to keep the engine rpm at spec idle speed.

Then adjust the idle speed to spec.

97sohc_d00d

I havent cleaned the iacv but the throttle body was clean i took it off to inspect in...what do i clean the iacv with? And yes its a p28 and i got the adjustable cam gear cuz i read all over the place it was needed to reach true time but later found out that was false

JuggerNaut-CTR

Here is a great write-up on finding whats causing your bad idle.

http://www.superhonda.com/forum/f55/...oblems-259965/

Former User

Then first remove the adjustable cam gear and install the stock one. Then do the other things I mentioned, as well as clean the IACV as others have said.

97sohc_d00d

Had it timed my buddy runs a shop we checked the timing its all good now when we unplugged the iacv it stayed running he said its supposed to shut off he said its no functioning properly so time for a new one

Former User

This test^ doesn't necessarily mean the IACV is bad - it also could be dirty or have a bad wire or even a bad ECU.

What ECU? Any CEL codes?

97sohc_d00d

Its a p28 and no cels

EJ8_Man

Yes please clean it with brake cleaner or another solvent and check the connection before spending money on a replacement

Former User

Yep^

Also consider that the idle speed is set too low.

97sohc_d00d

Would purple power industrial cleaner be too strong to clean it? And i had my buddy set the idle speed

97sohc_d00d

The iacv was not very dirty at all my only other thought could be...im running the map sensor from the y7 and the purge valve from the y7 any way this could be affecting it