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Old 03-09-2020, 09:16 PM   #1
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Default no Start merc7.4l MPI GENVI

Hello All Hoping to get some ideas here.
I have a 2001 2300SC 7.4L MPI. I have a no start situation.
I have Done all the Checks required by Manual. have great fuel pressure. good spark and compression is good. turns over strong. have checked ECM and codes.
throwing no codes. I checked the kill switch as well the fuel pump will not run with the kill switch off. But, the engine will still crank. is this normal?
Im at a loss here. any suggestion?
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Old 03-10-2020, 12:13 AM   #2
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This could be bad distributor cap and rotor, this is a common issue for corrosion inside. When did it last run and was anything done to it since then?
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Old 03-10-2020, 11:21 AM   #3
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In addition to Mike's comments and question, I'd add recommendation to do a complete tune up: distributor cap, rotor, coil, wires, and plugs. This will eliminate the most likely causes of your no-start.
There will be an ignition trouble shooting tree in your service manual. Let us know if you need assist with this.
To your question about the kill switch; what you are seeing is normal. The kill switch grounds the spark at your shift interrupt, but starter can still turn.
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Old 03-11-2020, 08:25 AM   #4
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All great advice guys. I did do all that you have mentioned. There was still no fire. I narrowed it down to the injectors pulled them and had em cleaned out. That did do the trick. Fired right up.
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Old 03-11-2020, 11:25 AM   #5
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Quote:
Originally Posted by Blang View Post
All great advice guys. I did do all that you have mentioned. There was still no fire. I narrowed it down to the injectors pulled them and had em cleaned out. That did do the trick. Fired right up.
Glad you resolved the issue and thanks for letting us know.
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