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Still Crank No Start. Very Strange

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R
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goldmandan
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Year and Model: 1999 S 70, 2000 V70
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Re: Still Crank No Start. Very Strange

Post by goldmandan »

would a bad maf or dirty maf cause it not to start, only sometimes?

Dan
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abscate  
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Post by abscate »

goldmandan wrote: ↑09 Jul 2019, 07:31 would a bad maf or dirty maf cause it not to start, only sometimes?

Dan
Possible but I would say rarely. You can disconnect it, then try (the car will run on a rmp/fuel map in software if there is no MAF signal)

You will have to clear MAF code after that.

Dont unplug/plug MAF with ignition on, shut everything off.
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goldmandan
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Year and Model: 1999 S 70, 2000 V70
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Post by goldmandan »

i read ecm2400 is a short to ground in the wire from ecm to cem. Would make sense as the fuel pump relay was replaced already and i just put a new one in. no change. And the CEM does have a yellow wire going to starting/charging system. I think i may have found the culprit as the ecm2400 triggers right after i erase it and crank again.
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