compression test

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quickH
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compression test

Post by quickH »

Hello all,

Can i do a compression test by pulling all connectors from the ignition coil and then trying to start? I don't want to fry my ECU

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Locoblade
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Re: compression test

Post by Locoblade »

The chances of a modern engine being low on compression are extremely small, how come do you want to do a compression test?

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Chapscrap
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Re: compression test

Post by Chapscrap »

OP has an oil consumption problem, see a
previous thread.
Current: June 2019 M140 auto Shadow, Sunset Orange/Oyster/Adaptive, + other options.
Gone: Too numerous to list, but I am quite old.😉

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Locoblade
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Re: compression test

Post by Locoblade »

Ah ok, fair enough, much more likely to be something like the turbo seals than bore wear though I'd have thought.

Autosri
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Re: compression test

Post by Autosri »

Yeah you should be good just unplugging the coil packs and spinning the engine over

It will throw a load of engine codes so aslong as you have something to clear them after

Good luck and hopefully it comes back alright

quickH
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Re: compression test

Post by quickH »

Locoblade wrote:
Thu Mar 26, 2020 7:37 am
Ah ok, fair enough, much more likely to be something like the turbo seals than bore wear though I'd have thought.
Have had the intercooler off and it was clean. It consumeert about 1l every 1500km so if it was the turbo i guess it would have been dripping oil out of the IC

Thanks for the replies. Anybody knows the fuelpump fuse number/location?

JohnsM135i
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Re: compression test

Post by JohnsM135i »

quickH wrote:
Locoblade wrote:
Thu Mar 26, 2020 7:37 am
Ah ok, fair enough, much more likely to be something like the turbo seals than bore wear though I'd have thought.
Have had the intercooler off and it was clean. It consumeert about 1l every 1500km so if it was the turbo i guess it would have been dripping oil out of the IC

Thanks for the replies. Anybody knows the fuelpump fuse number/location?
Not necessarily, oil can go both ways ie into the exhaust side/hot side as well as the compressor side.


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M240i :D
M135i loved it, but gone

quickH
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Re: compression test

Post by quickH »

JohnsM135i wrote:
Sun Mar 29, 2020 8:46 pm
quickH wrote:
Locoblade wrote:
Thu Mar 26, 2020 7:37 am
Ah ok, fair enough, much more likely to be something like the turbo seals than bore wear though I'd have thought.
Have had the intercooler off and it was clean. It consumeert about 1l every 1500km so if it was the turbo i guess it would have been dripping oil out of the IC

Thanks for the replies. Anybody knows the fuelpump fuse number/location?
Not necessarily, oil can go both ways ie into the exhaust side/hot side as well as the compressor side.


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might pop off the downpipe than to check the shaft play and see if there is anything strange to see

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