hi guys i have a small problem in that every now and then my zed will go down to 5 cylinders let it cool for a while and she is ok the problem is more frequent its been suggested that it is the C A S is this true or is there somethink else i need to look at many thanks guys:)

coil packs or PTU or even dirty connectors on the injectors

Begin with swapping the coil and see if it happens again on the same cylinder.

Begin with swapping the coil and see if it happens again on the same cylinder.

hi mtae tryed that one and made no diffrence took the spark plug out and it was dry so it would point to injector its no.2 cylinder:(

hi mtae tryed that one and made no diffrence took the spark plug out and it was dry so it would point to injector its no.2 cylinder:(

 

Before you start getting the glums when thinking about an injector being down, get hold of a spare injector connector complete with about 150mm of wire connected to it. Fit this to the injector that is not firing properly, and touch the wires across the terminals of the little squareish 9V battery, the type with both terminals on the top. If the injector is OK it will click everytime you connect / disconnect one lead, if it don't click, then its faulty.

Something else you can try, is take off the CAS, and turn the centre of it, with the ignition on, not too slowly, you should hear the injectors click, and if there is six clicks all in equal positions of the rotation, then it should be injecting, possibly blocked? If it doesn't click as it should, take off the plug from the injector (careful tho, the plastic becomes very brittle) and see if it is corroded (check the plug and the injector connector) it'll look a minging green colour if it is, clean it up and try it again. Also, swap the spark plug over for one you know works, and see if there is any difference.... Hope this helps mate...

Sounds just like a series 1 PTU. Which do you have?

Something else you can try, is take off the CAS, and turn the centre of it, with the ignition on, not too slowly, you should hear the injectors click, and if there is six clicks all in equal positions of the rotation, then it should be injecting, possibly blocked? If it doesn't click as it should, take off the plug from the injector (careful tho, the plastic becomes very brittle) and see if it is corroded (check the plug and the injector connector) it'll look a minging green colour if it is, clean it up and try it again. Also, swap the spark plug over for one you know works, and see if there is any difference.... Hope this helps mate...

hi mate thank you will try that one have got new injector connectors that i brough for my other one so i think ill put them to good use . thanks nz niggles iam runnig a series 2 ptu unit :D