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Joe
Joe, Marine Mechanic
Category: Boat
Satisfied Customers: 7136
Experience:  ASE, electronics, Marine mechanical and electronics, pwc, wiring, all around repair tech,
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1998 454mpi won't start sometimes,installed a new dist.

Customer Question

1998 454mpi won't start sometimes,installed a new dist. last week started rite up . customer picked it up ran for 10 minutes then shut off.this was a huricane victim back in 07. iac, o2 sensor, throttle position sensor an coil have all been changed.
Submitted: 1 year ago.
Category: Boat
Customer: replied 1 year ago.
Has anyone ran into this problem before??
Customer: replied 1 year ago.
Probably so,no one i know of.It started up several times yesterday evening, this morning won't start. with a noid lite at coil wire if it flashes it will start. we may have to talk on the phone. Master plug and electrical connections have all been removed and checked for corrison.Key switch seems ok but i am going to change it anyway.We are trying to eliminate things one at a time.
Customer: replied 1 year ago.
We changed ignition sw no change
Customer: replied 1 year ago.
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Expert:  Joe replied 1 year ago.
Hello,
Thank you for allowing me to assist you, my name is ***** ***** I will be happy to assist you with your concern today.
You stated "noide light at coil" I assume you mean your using it as a test light on the neg pulse side of the coil, please confirm 12v pos on the pos side and then I assume that if the pulse.... the light does not flash it will not produce spark at that time, just to confirm this is what is taking place, correct?
I see the distributor, coil, iac, tps and o2 have all been replaced, the distributor has a pickup coil which communicates with the ignition module, the ignition module provides the pulse to the coil, I have a feeling if you have not already done so that if you replace the ignition module the problem will be resolved. If this has already been replaced with a new quality oem part please let me know.
Thank you!
- Joe
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