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Author Topic: I think my mig maybe dead!  (Read 1471 times)

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omegod

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I think my mig maybe dead!
« on: 24 February 2014, 09:21:54 »
Went to start it this morning and it nearly caught then made a fluffy type noise, following cranking sounded very fast and certainly not normal at all, compression gone???. AA on route to see what the score is :'(
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zirk

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Re: I think my mig maybe dead!
« Reply #1 on: 24 February 2014, 09:54:12 »
Quote from: omegod on 24 February 2014, 09:21:54
Went to start it this morning and it nearly caught then made a fluffy type noise, following cranking sounded very fast and certainly not normal at all, compression gone???. AA on route to see what the score is :'(
Hmmm, if its spinning, could be Cambelt gone, get the AA Man to check it first, before continually trying to crank it over.
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omegod

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Re: I think my mig maybe dead!
« Reply #2 on: 24 February 2014, 09:58:31 »
Well stone me, false start meant petrol washed away the oil resulting in the low compression symptoms ! started eventually and running sweet :y

Borewash apparently!
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zirk

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Re: I think my mig maybe dead!
« Reply #3 on: 24 February 2014, 11:25:14 »
Result then,  ;)
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Webby the Bear

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Re: I think my mig maybe dead!
« Reply #4 on: 24 February 2014, 13:44:39 »
Guys, what is bore wash? Out of interest.
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Marks DTM Calib

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Re: I think my mig maybe dead!
« Reply #5 on: 24 February 2014, 14:15:00 »
Bore wash is where unburnt fuel washes the oil from the bore sides and compromises the piston ring seal.

The question is......why all the unburnt fuel
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omegod

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Re: I think my mig maybe dead!
« Reply #6 on: 24 February 2014, 15:39:58 »
Quote from: Marks DTM Calib on 24 February 2014, 14:15:00
Bore wash is where unburnt fuel washes the oil from the bore sides and compromises the piston ring seal.

The question is......why all the unburnt fuel

Indeed, it caught a little then didn't start but I wouldn't have thought it would chuck enough much juice in to cause that problem?
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Marks DTM Calib

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Re: I think my mig maybe dead!
« Reply #7 on: 24 February 2014, 15:41:08 »
Indeed.

By the way, if you do get signs of flooding, floor the throttle and crank it for a bit.
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Webby the Bear

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Re: I think my mig maybe dead!
« Reply #8 on: 24 February 2014, 17:30:30 »
So basically it's over fuelling somehow? So first port of call would be looking to see if its going to closed loop or not?
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Marks DTM Calib

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Re: I think my mig maybe dead!
« Reply #9 on: 24 February 2014, 19:18:39 »
Quote from: Webby the Bear on 24 February 2014, 17:30:30
So basically it's over fuelling somehow? So first port of call would be looking to see if its going to closed loop or not?

In this case no as it was a cold start so would have been open loop until it was warmed up (O2 sensors only operate when very hot).

It could be a weeping injector, flooring it and cranking for a few seconds followed a normal start would prove that
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Webby the Bear

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Re: I think my mig maybe dead!
« Reply #10 on: 24 February 2014, 22:09:41 »
Quote from: Marks DTM Calib on 24 February 2014, 19:18:39
Quote from: Webby the Bear on 24 February 2014, 17:30:30
So basically it's over fuelling somehow? So first port of call would be looking to see if its going to closed loop or not?

In this case no as it was a cold start so would have been open loop until it was warmed up (O2 sensors only operate when very hot).

It could be a weeping injector, flooring it and cranking for a few seconds followed a normal start would prove that

Yeah, should have realised that  :-[
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