1986 Honda CRX misfire

RUDOLFCRX

MEMBER
1986 HONDA CRX
4 CYL
FWD
MANUAL
190,000 MILES

Hi, I have a 1.6 16v DOHC zc1 and I have a random misfire problem. I detected a smal gasoline leak at injector 1. I replaced the injector 1 and 2 and the o ring was replaced too. When I turned on the engine, there was a misfire, but not random, it was continous misfire, but I dont know in witch cyliner and what cause the problem. It sounds like I drive a choper with 2 cylinders, and loss power. How can I detect in witch cylinder is the problem, and what cause it? Thanks for help

Thursday, October 1st, 2009 AT 5:19 AM

3 Replies

KHLOW2008

MECHANIC
41,814 POSTS

Hi rudolfcrx,

While engine is idling, pull out a spark plug wire and watch if the idling changes. Test separately for each cylinder. The cylinder tht does not affect the idling much would be the culprit.

Did you check the spark plugs and wires?

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Thursday, October 1st, 2009 AT 1:49 PM

RUDOLFCRX

MEMBER
13 POSTS

I have change the no1 injector, and now everything works fine, look like the problem was there. But I have some litle random misfire, I heard it, and there is a minimal shake, but it is random, and the engine works fine. Maybe bat gasoline, becouse here we got max 93-95 oktan petrol. :( Or maybe something else for doing random misfire?

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Saturday, October 3rd, 2009 AT 11:40 AM

KHLOW2008

MECHANIC
41,814 POSTS

Random misfire are usually caused by ignition faults and most often it is either bad spark plugs, wires or rotor.

Get the plug wires ohmed out for resistance. There should be continuity and less than 25 k ohms. Check the connectors for snugness when plugging into soark plugs.

Check the ignition timing, with the octane used, the timing should not exceed the specified mark as indicated on the crank pulley.

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Saturday, October 3rd, 2009 AT 9:24 PM