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Hard start + misfire when hot.

Posted: Mon Sep 21, 2015 2:45 pm
by AllRight
Car: 94 honda civic ej2
Motor: B20B
ECU: P28 + S300

Hi. I connected CPR according to instructions. I checked it with troubleshooting manual and it is OK.

Sync light is not blinking when I try to start engine. It appears after 2-3 seconds and engine is starting. ECU disconected from sManager in this moment and it can't be connected while engine is working.

When engine is cold Idle is working good.
But there are misfires after warming up and when I press accelerator sharply pistons are knocking like ignition before top dead point.
It occurs before 3000rpm and after 4000rpm.
Can you help me? Thanks.

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Re: Hard start + misfire when hot.

Posted: Mon Sep 21, 2015 3:44 pm
by Spunkster
What spark plugs are you using?

Re: Hard start + misfire when hot.

Posted: Wed Sep 23, 2015 2:07 am
by AllRight
Thanks!

Re: Hard start + misfire when hot.

Posted: Wed Sep 23, 2015 6:04 am
by AREA876
Was the spark plugs the problem?

Re: Hard start + misfire when hot.

Posted: Wed Sep 23, 2015 7:19 am
by AllRight
Yes. NGKR5672A-8 does not have a resistor. I installed BKR8EIX and problem was solved.