Hi Bob, It’s not a good idea to remove the plug leads with the engine running, the voltage from the coil output will go far higher than it would with the plug connected and it can damage the coil pack. The best way to try to isolate the problem to a specific cylinder is to unplug the injector instead, on the zetec 3 of these are quite easy to do and the 4th can be done with a fiddle.
Coil pack problems normally end up with the Zetec running on 2 cylinders as there are 2 double ended coils in the pack. The Edis module can cause similar faults, running on 2 cylinders. Once cold the engine probably won’t start if it’s running on 2. Otherwise, try some new plugs, after that it starts getting a bit more tricky. A compression test would be worth doing if you have a gauge. I’m afraid i can’t remember if duty cycle gauge did anything, Matthew did most of the mapping. Hopefully your fault will stay, my ZVH turbo intermittently drops onto 2 or 3 cylinders but it’s very intermittent, last time i had it out it got all the way to Stoneleigh (100+ miles) and almost all the way back before it occurred, stayed the rest of the way home and the next day it was gone again. Jim From: Bob Craig Sent: Wednesday, October 28, 2015 12:54 PM To: Quantum Owners Group Subject: [Quantum Owners] Misfiring Zetec After about 100 mile run on Sunday and thankfully only a mile so so from home, the Quantum Started misfiring. Checked usual stuff like connections etc but didn't have time to get a good look so put it to bed in the garage until tonight. It's a Zetec Silvertop turbo running megaSquirt. It sounds like it's running on 3 cylinders but there is no real difference when removing plug leads one at a time. Changed spark plugs around too but no effect. Fired up the laptop and had a look at the megasquirt dashboard. I noticed that the duty cycle gauge wasn't doing anything but can't remember if it did before. It's all black art to me anyway as my experience was with old school stuff. Any advice welcome. Bob -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to quantumowners@googlegroups.com To unsubscribe from this group, send email to quantumowners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s). --- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to quantumowners+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to quantumowners@googlegroups.com To unsubscribe from this group, send email to quantumowners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s). --- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to quantumowners+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
