Constant Misfire

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whiplash willy
Posts: 223
Joined: Sun Sep 19, 2004 1:19 pm
Car: 93 Coupe 90 SR Hatch

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My Ka24e is constantly misfiring/shaking during idle and under load. You can hear a poping out of the exhaust but no smoke is coming out. (except for a puff of white during startup). I checked for ECU codes, and nothing came up. I tested and cleaned my MAF and checked my coolant temp sensor (which is pretty new.) I changed my spark plugs and checked for spark, and that turned out good. I also put a screwdriver up to my injectors and made sure they were clicking. When I unplugged my injectors, #3 and #4 had no effect when unplugged. The same for the spark plugs. Any ideas?


SturgeonGeneral
Posts: 143
Joined: Fri Jun 11, 2004 10:18 pm

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#3 and 4 cylinders are dead.....not firing, pull those plugs out see what they look and smell like. white smoke out the exaust often indicates coolant. make sure those 3 and 4 plugs arent soaked in coolant

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whiplash willy
Posts: 223
Joined: Sun Sep 19, 2004 1:19 pm
Car: 93 Coupe 90 SR Hatch

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The plugs are pretty dark. #3 was wet, I couldn't really smell what it was. The smoke could be blue, im not sure it is hard to tell.

jh3xp
Posts: 117
Joined: Thu Jun 28, 2007 8:05 pm
Car: 1992 240sx SE Coupe

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same thing happens to mine cept i havent checked if thers white smoke or anything from my exhaust..... it like shakes real hard on idle and i got a valve tick and small popping noise form exhaust on idle

as for the blue smoke that means ur burning oil and could be ur valves or valve stems going bad

SturgeonGeneral
Posts: 143
Joined: Fri Jun 11, 2004 10:18 pm

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whiplash willy wrote:The plugs are pretty dark. #3 was wet, I couldn't really smell what it was. The smoke could be blue, im not sure it is hard to tell.
well, figure out what its wet with, either fuel or coolant. Its not that uncommon for these injectors to get stuck open.


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