VIDEO OF SAID MISFIRING
http://www.youtube.com/watch?v=INOkZIHSa7Q

i have a 99 dx hatch with a stock d16y7 with an ex exh mani an ex intake mani it ran fine for 2 years then it started misifirng but didnt throw any codes then it started running real rich.

i can disconnect injector 4 and the idle stays the same i can disconnect plug wire 4 and nothing changes and it throws p301,p302,p303,p304 and p1300 and p1399 i just installed a new distributor ,wires, cap, rotor,ngk plugs and injectors and still nothing i turn it on and the cel starts blinking like crazy idles like a subby and sounds like a subby when i hit it


Modified by iNfAmOuS_PuTt_pUtT at 8:45 AM 5/17/2007

 

Im thinking either a grounding issue or a main relay issue. Try both of those.

 

ima check the main relay but do you think a bad battery could casue this?

 

help

 

so you get misfires on all the cylinders or just #4. I see you get codes for all of them. if its only one cylinder then misfires can be caused by no spark, no fuel, not enough compression. so switch spark plug 4 with 3 and see if the problem stays in cyl 4 or follows the plug. same thing with the inj. perform a compression test.

 

i can disconnect wire 4 and nothing changes in the idle same thing if i unplug injector plug 4

 

whenever i reset the ecu it idles really low with no cel on for a while

 

double check the position of the wires on the cap since you just changed that.

 

time for a block check to see if your head gasket gave up and a compression/leak down test too. sounds like a mechanical problem to me

 

damn idle is so low

 

many things it could be. how mechanicaly inclined are you. check valves for cracks, not seating, cracked spark plug, shitty spark plug like autolite plugs i see many people use, rotor, cap, wires, compression,injector, injector pulse. and some other stuff im forgetting.

 

Check the compression on the #4 cylinder first.....

 

BUMPPPPPPPP

 

replace and or switch with another cyl. the spark plug and injector.

if not sounds like a head gasket problem. but do a compression check on all four and if the #4 is low you got a problem

 

SOMEONE SELL ME A Z6 HEAD

 

did you ever get this problem fixed? i am having the same issue with my 1999 civic ex

 

have you checked the positon of the plugwires as suggested by gotbooost? check it end to end..

have you experimented on advancing/retard the timing before this problem occurred?
what did you do to your car before this happened?

 

problem fixed? or not?

 

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