Sparkless 740

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Nov 17, 2005 | 01:14 AM

WagHag

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Joined: Nov 2005

Posts: 78

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From:

Sparkless 740

My 90' 740 turbo wagon won't start. It suddenly died one afternoon while I was parking. It will turn, but won't start. I've since replaced the electronic control unit and ignition coil. Still nothing. The power stage is next. I know the timing belt is not broken, the valves are opening and closing and fuel is making it to the fuel injection assembly. When I unplug the coil wire from the distributor, I get a weak pulse but no visible spark when it's cranked. I was told that it could be the pickup coil in the distributor. Any help or points in the right direction would be greatly appreciated!

Nov 17, 2005 | 01:26 AM

tech

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Joined: Sep 2004

Posts: 36,349

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From: Orlando, Florida

RE: Sparkless 740

Either the pickup in the Dist. or the engine speed sensor which ever one you have.

Nov 17, 2005 | 09:56 PM

wojeepster

Senior Member

Joined: Sep 2005

Posts: 393

Likes: 2

RE: Sparkless 740

check radio suppression relay if you are not getting pulse at fuel injectors. On my 740 it is over by the coolant tank. This is only if you are not getting gas into the combustion chamber.