Help needed, e46 m3 wont start after doing a compesion test

Help needed, e46 m3 wont start after doing a compesion test

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RetroTed

Original Poster:

1,025 posts

224 months

Thursday 5th November 2020
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Evening all, so I performed a compression test this morning and all is well however now the car wont start

It turns over but wont fire. I have gone over my work 3 times and its all good. I have plugged my diagnostics in and no faults found apart from voltage supply ews3 control module which cleared ok

Has anyone had this issue ? It sounds like the fuel is priming and the fuel relay fuse is ok

As i mentioned everything is put back together correctly

ubbs

690 posts

232 months

Friday 6th November 2020
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My e46 m3 occasionally wouldn’t start turned out to be a flat spot in the starter motor, have you tried bump starting it? Don’t think you can if it’s SMG.

Elliot2000

785 posts

191 months

Friday 6th November 2020
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Does it sound like it spinning over faster than normal? You may have washed the bores with petrol and lost compression, although you should have noted a drop in compression readings

Or ews needs to be realigned

E-bmw

11,089 posts

167 months

Friday 6th November 2020
quotequote all
Did you remove the fuel pump relay to do the test?

Is it back in properly?