1997 900S starting problem.

Recently aquired 1997 2.3L non-turbo manual trans 900S frequently fails to start. Cranks fine, good battery voltage, no spark, fuel pump runs and develops normal pressure during no start condition. Resistance readings on coil and camshaft sensor appear normal. Crankshaft sensor is 930 ohms. Can get car started by a dose of starting fluid in the throttle body and will run and start fine for a week or two and then no-start condition reappears. No start appears after vehicle sits 10 hours or more, never had a problem with re- starts after getting going in the morning. Cannot figure out the relationship of the starting fluid to the computer releasing the ignition. Is there any info available on what inputs the Motronic computer is looking for to start sending pulses to the coil? Thanks for your help.

Reply to
garygr
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It is possible that the check valve in the fuel pump which keeps the fuel lines pressurized is leaking (you mention no start appears after 10 hours...) and therefore you don't have enough fuel pressure in the lines to energize the fuel injectors when you start the engine

Reply to
Bjorg

You can usually diagnose that one by turning the ignition to "on" for a minute before attempting to "start". If it fires up quickly after that, you have a fuel delivery issue - usually the pump.

Reply to
still me

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