Help Sounds Like Running On 5 Cylinders?

[tdbzs12]

hey guys any ideas my car sounds like its running on five cylinders,

what do yous reckon, just a stuffed plug or??? got any ideas?

[mystery_kid]

plug, coilpack, injector...

check all the little plugs for the fuel injectors are on properly

Edited June 6, 2010 by mystery_kid

[AUS R32]

Clean sparks?

[tdbzs12]

its been raining a heap to any one reckon its could be moisture somewhere?

[Curmi]

i had same problem but as above

check all coil pack wiring(the plugs and inside the plug to the coil packs get brittle and brake) i had to get new coil pack loom from just jap.

check all ground wiring.

spark plugs.

coilpacks.

cas.

you just have to start eliminating these things one by one

[tdbzs12]

http://www.skylinesaustralia.com/forums/EC...p;hl=diagnostic

thinking can i try this?

[tdbzs12]

since my last post i have determined its cylinder 5 not firing ive checked the coils and the plugs and there fine. as im an electrician not a mechanic i took it to one he checked the same and the injectors again all good but determined the coil plug was not getting enough voltage on the primary side??? i was also told it was supposed to be 2.5kv?? i dont know of a mutli-meter that tests this high? but was assured it was not jumping to the block when they tried to get it to. and to take it to an auto electrician. so i was wondering if any one had a wiring diagram that i could use to try and find the fault or any ideas on what it could be??? or more on how it works to assit me fixing the problem

cheers

Edited June 20, 2010 by tdbzs12

[tdbzs12]

anyone?

[tdbzs12]

ok so i pulled the computer out the other night to see if i could run a self diagnostic, could quit figure out if my ecu had leds to flash codes so i gave up on that. i had the computer siting on me passengers floor still and i started seemed to be running on all six again so as i jumped out of the car i closed the door causing the cylinder to drop out momentarily so i went and taped the wiring loom going to the ecu each time causing a cylinder to drop out, i the proceeded to try to find out which wire was causing the assumed bad connection with no luck and what seemed to be multiple cylinders to drop put!!! keep fiddling and got all to come back but stil unsure which wire repeated this process a number of time and still no result!?

can doing this somehow damage something or confuse the computer???? as it would be registering fault codes on the ecu wouldnt it?