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evilscorp

P0350 What to look for.

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So my car randomly started feeling rough like 5 cylinders one morning, I drove it out the driveway and back in, and was shown check engine/slip/VDC off.

I put this down to old spark plugs so changed them, car started fine, left it for a few hours while I fixed my bonnet hinges and then went to start.... Nope problem still there running rough.

I've done a compression test of all cylinders and getting 200-210 on all cylinders.

Tested the resistance of the coilpacks (3 pins holding a volt meter between two and changing to different pins) all readings either infinity or reading something above 0 (i believe if any show 0 or close then its a dead coil?)

None of the coils have bulges.

I cleaned up the 4 obvious grounds on the front of the engine bay.

 

Not sure what else I should be looking for?

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Do you have the uprev cable? Mines in Australia so can’t really remember if you can still do it after they ‘upgraded’ the software, but it used to have a test where each cylinder could be switched off - easy way to track one out of 6.

 

Obvs assumes you have the cable etc.

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No sadly never got one as the plan was/still is to run haltech platinum when I can be bothered to fit it/build my spare engine.

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I would say coil pack Gary.

 

if not that, then perhaps an injector.

 

If the misfire is there on tickover then just disconnect the coils one at a time when car is running.

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14 hours ago, ZMANALEX said:

I would say coil pack Gary.

 

if not that, then perhaps an injector.

 

If the misfire is there on tickover then just disconnect the coils one at a time when car is running.

Yeah I am thinking the same, just checked the voltages across the battery and across the engine grounds and battery positive and they are all the same when off and when running.

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Thanks for your the tip Alex, turns out there is no way of telling the coil was bad other than unplugging it. First one I tried cylinder no 3 and no change then everyone after made the vibrations worse, swapped in a spare coil pack to number 3 and hey presto it’s running smooth again. There are no bulges and the resistance between pins are same/similar to working coils. 

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