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running rough v3/4 conversion


tydon

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so i finally started up my v3/4 conversion in my gtb. its started quite rough which was expected for a motor that had been sitting awhile. its seems to be running on 3 cylinders no check engine codes. motor shakes quite alot.when i touch throttle and rev it a little the motor stops wobbling. when i pull the passanger side leads off it almost dies. but when i pull the drivers side leads it doesnt affect the running at all any ideas?.

sparkplugs maybe bad or wiring mixed up?

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ive traced wires and ive got a9 and a10 ecu wires going to correct plugs on igniter.

i went off the coil pack mod in single turbo conversion but for a9 i ran into problems the wire wouldnt trace to the plug in the engine bay.

Im using a v3/4 manifold loom aswell

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nope ... i must of miss read the coil pack mod ive only got ign(4) and ign (3) gunna have to recheck tomorrow. Question what if i were not to use the car loom and run sperate wires dedicated to A9 and A10 to from ecu to igniter?.

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Yeah guess you could, maybe use the same gauged wire.

Edit: Nah it should of been ok, if your using an igniter/lead setup you shouldn't have to do any splicing at the ECU.

A10 - cyl 1&2

A9 - cyl 3&4

Edited by Rosssub
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 tydon said:
ok if it starts to splutter and die?

Are you asking "what if it starts to splutter and die" once you've tried swapping those two leads?

Or did you try it and still spluttered and died?

Cause if you've tested with the leads swapped over, then I'd be checking the basics first i.e. does each cylinder have a spark?

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It won't start if I swAp leads on either side and when I change leads when it's running in passenger side it splutters and dies where as the drivers side the idle drops a little but doesn't die. I realised I also didn't change or bridge the earth wire so I'm going to do that now aswell. Lol

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so ive paired the ignition wires correctly and made sure they are going to correct wires on igniter and ive bridged the earth from b18 to b12. car starts alot easier seems to of mmade a differnce took for a test drive and smoke coming out engine bay everywhere lmao i think the oil feed is leaking oil everywhere - so thatl need replaced and the motor still shakes alot possible engine mounts tey looked good before i put motor in so yeah.

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Is that the oil feed line that was kinked? Has it split or just the washers leaking?

Grab a spare spark plug, fit it into the leads one at a time and earth the plug onto the block (with insulated pliers). Make sure you have good strong spark at all 4 cylinders. Could be a weak/dudd lead on one causing it to run rough.

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ok so i got a replacement oil feed and thats all fixed up and ready to go i pulled a lead out off motor and started car and it runs the same as if it was plugged in. any ideas i know the leads and coilpack is ok

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ive also tryed spinnning the coilpack around got it to start but was the same deal i can pull the drivers side leads and itl run as it is but as soon as i touch passanger it will stall and die.so either was its the drivers side that can still run with leads out and start with them out.

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