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Home > Help Needed / General Tech Chat > Fried Coilpack? | |||||||
428 Posts Member #: 10128 Senior Member Dorset |
14th Jun, 2021 at 09:56:29am
Morning all,
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5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
14th Jun, 2021 at 10:56:21am
It's possible but my own personal experience when one failed on me was one half failed completely, just went open circuit so I went straight down to 2 cylinders.
Schrödinger's cat - so which one am I ??? |
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428 Posts Member #: 10128 Senior Member Dorset |
14th Jun, 2021 at 09:22:43pm
Went over everything with a multimeter, nothing appeared out of the ordinary.
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428 Posts Member #: 10128 Senior Member Dorset |
17th Jun, 2021 at 09:49:34am
Alternator changed, voltage output is now as expected. but still running like a bag of shit. I've got another EDIS, so maybe throw that on. Otherwise it's back to pointing the finger at the MJ. Although laptop is showing it receiving the right signals and using the map, guess it may not be outputting it? Not sure. Some thinking to do |
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5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
17th Jun, 2021 at 04:03:17pm
What do the spark plugs themselves look like ?
Schrödinger's cat - so which one am I ??? |
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428 Posts Member #: 10128 Senior Member Dorset |
21st Jun, 2021 at 09:34:50am
Thanks Rod, all four are fouling. Changed the leads (and swapped order around too, in case new coilpack was ordered differently)
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177 Posts Member #: 10990 Advanced Member Hornsea |
21st Jun, 2021 at 10:23:51am
I had a very similar problem which belive it or not ended up being a cracked exhaust manifold. It was probably my fault as I wrapped it and must of got too hot. It's mainly used as a track car so it gets plenty of hammer. Worth a look .
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5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
21st Jun, 2021 at 12:16:40pm
Sounds like a fuelling issue rather than coilpack (or anything ignition related).
Schrödinger's cat - so which one am I ??? |
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428 Posts Member #: 10128 Senior Member Dorset |
22nd Jun, 2021 at 10:01:51am
On 21st Jun, 2021 burcy35 said:
I had a very similar problem which belive it or not ended up being a cracked exhaust manifold. It was probably my fault as I wrapped it and must of got too hot. It's mainly used as a track car so it gets plenty of hammer. Worth a look . Roy B Thanks Roy, Taken inlet and carb off last night, mine is wrapped too, looks like a little blow by on the turbo/exhaust join, but will get it out later and inspect. |
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428 Posts Member #: 10128 Senior Member Dorset |
22nd Jun, 2021 at 10:07:00am
On 21st Jun, 2021 Rod S said:
Sounds like a fuelling issue rather than coilpack (or anything ignition related). Regulator or leaking float valve would be the obvious ones. Anything else you did to it with your previous problem that may shed some light ? I wouldn't worry about detonation even if you think you hear it, rich mixtures burn slow, not fast. What you could be hearing is just mechanical noise from uneven running because of the misfire. I tend to agree with you on fuel, now that everything in the ignition system has been changed, inspected and verified. Carb came out last night, when I undid the first dash pot screw sounded like the piston/plunger fully retracted, could well have been the issue, open somewhat all the time. Would figure as why it was running rich and not happy until it went past that fuelling point. On rolling road, after the needle was fettled by Neil, we had a similar problem, thought it was due to dash pot sitting on the seal at one point. But maybe there's something out of tolerance in the piston/plunger assembly. |
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428 Posts Member #: 10128 Senior Member Dorset |
22nd Jun, 2021 at 10:07:53am
Oh, and did measure the fuel pressure, 3.8psi at idle/pump only state. |
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