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28th January 2020, 16:41 | #21 | |
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Check the earth strap on the rear bank then... Sent from my iPhone using Tapatalk
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28th January 2020, 20:27 | #22 |
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Don't you it's about time you got off your sofa Simon, and prove yourself to the membership?, Banbury is only about sixty miles up the road from you, and I'm sure with your superior KV6 knowledge, you can soon put those spanner monkeys in their place.
I assume you own a compression tester, and even know how to use it, and more to the point, think of how you are you going to tell the mechanics that they are making a big mistake by misdiagnosing HGF or a burnt out valve, or a hole in a piston, when in fact it's the Herby clips in the wrong place, coupled with non adherence to the MGR coolant refill procedure, or perhaps as the belts that were replaced 30,000 miles ago, it's the possibility of a non functioning low speed fan, due to none ECP brushes having been used in a previous repair Anyway back from Simon's fantasies about being better than everyone else at repairing the KV6 Toby, for what it's worth, I suspect there may been an earth left off the rear bank, and there is a defective coil driver transistor in the ECM as a result, this can be diagnosed by unplugging the ECM and sniffing the connector, as if my hunch is correct, there will be a very distinctive burnt electrical smell. As to low compression, I've seen these run with compression as low as 100 PSI without a significant misfire, and down as low as 85 PSI with a splashy intermittent misfire.........is the symptom a constant misfire on No.4, as in running on only 5 cylinders? Please let us know how you get on, Simon is waiting to tell everyone "I told you so" Brian |
29th January 2020, 07:58 | #23 |
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Thanks for that info Brian & Simon. Yes, it is a constant misfire, I.e only firing on 5 cylinders, with no. 4 being the culprit. I am going to pop down to the garage in Banbury and check the Earth strap and ECU before they start expensively ripping apart the engine. Is the earth strap obvious? Where does it attach? As the garage can’t start work until next Monday I have time.
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29th January 2020, 10:20 | #24 | |
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Sadly I don't have a picture of a KV6 earth strap to the rear bank, but this would be something one of the V6 boys could sort out Brian |
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29th January 2020, 10:35 | #25 |
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The earth strap is a small black wire with a ring connector on the end, have a look behind the rear bank of cylinders towards the bulkhead, it will be obvious where it exits the main engine loom.
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29th January 2020, 10:44 | #26 |
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Although this is the front bank this is what you’re looking for on the rear.
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29th January 2020, 10:45 | #27 |
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Have a look at this thread: https://the75andztclub.co.uk/forum/s...d.php?t=225611 post 8 - there's a picture of the earth on the rear bank.
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29th January 2020, 19:12 | #28 | ||
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I’m interested about this earth strap, I’m gonna check that as the car had a replacement thermostat, spark plugs and IMGs. If the ECU smells of electrical burny burny, what’s the solution Brian? |
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29th January 2020, 20:22 | #29 | |
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I can transfer the data to another unit to make a plug a play replacement though Brian |
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29th January 2020, 20:31 | #30 | |
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