Car fires but won't run

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Gixerthou
Joined: Sun 17 Apr, 2011 21:28
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Car fires but won't run

Post by Gixerthou » Tue 13 Sep, 2011 19:59

Not used it for about a Month and fuel was low. Just put a gallon of fresh fuel in, it fires but wont run. Any ideas please?

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hornel Z3M
Joined: Sun 16 May, 2004 21:33
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Location: RAGLAN

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Post by hornel Z3M » Tue 13 Sep, 2011 20:05

probably sucked up some dirt from running petrol too low, or an air lock :wink: keep at it, it should start.

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Gixerthou
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Post by Gixerthou » Tue 13 Sep, 2011 20:14

Thanks battery keeps going flat now :head:

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Gixerthou
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Post by Gixerthou » Wed 14 Sep, 2011 13:59

Still won't start, turns over and fires once. :rtm:

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aceman
Joined: Sun 01 Jun, 2008 12:16
Posts: 1478

  M roadster S50
Location: Wakefield

Post by aceman » Wed 14 Sep, 2011 14:54

Crankshaft sensor ?
Aceman

Arctic Silver '98 Z3M

Previously;
Bright RED '99 Z3 2.8

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wifevanda
Joined: Mon 09 Aug, 2010 20:36
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  Z3 roadster 2.0
Location: dagenham

Post by wifevanda » Wed 14 Sep, 2011 17:19

just had the same try unpluging the air flow sensor it worked on mine

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Gixerthou
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Post by Gixerthou » Wed 14 Sep, 2011 17:56

:lol: Spot on.... How do I clean it? Can I run without it?

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aceman
Joined: Sun 01 Jun, 2008 12:16
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  M roadster S50
Location: Wakefield

Post by aceman » Wed 14 Sep, 2011 18:23

Good spot I remember Jonttt having a similar experience albeit after he cleaned his. Your ECU by unplugging the MAF has dropped into a default mode allowing the engine to run but will be a little rough but perfectly safe. To be honest if it is as bad as not allowing the engine to run at all when connecteed I would be looking at replacing it as they are very very sensitive to cleaning. They have a platinum wire thinner than a human hair which if gets broken means the MAF is a gonner, spraying any cleaner on is enough to break it in most cases.
Aceman

Arctic Silver '98 Z3M

Previously;
Bright RED '99 Z3 2.8

Rocking seats ? You need seat bushes click HERE

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Gixerthou
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Post by Gixerthou » Wed 14 Sep, 2011 19:07

Great stuff. Just unplugged it and it runs. It looks like one of the wires has snapped. It is safe to drive unplugged then? Thanks Guys had a wor tying night last night hate not knowing what's wrong.

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stu
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  Z3 roadster 2.8 supe
Location: On the edge!

Post by stu » Wed 14 Sep, 2011 21:34

As said, the ECU uses a safe default value and will run rich, but is safe to drive.
someone in a minority once wrote:I know I'm in a minority
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Gixerthou
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Post by Gixerthou » Fri 16 Sep, 2011 22:54

Big Thanks to Johnjo, all sorted now. Maf fitted and car runs great. Thanks to all for your help.

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