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Old 08-05-2017, 11:43 AM
TimothyEllis's Avatar
TimothyEllis TimothyEllis is offline
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Boat: Mastercraft Prostar 190 1999 5.7l vortec
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Help! She won't start '99 ps190

'99 Prostar 190 won't start. Just cranks and cranks with no sign of coming to life.
I've tried changing the following with known good units but no luck so far :
Changed plugs
DIstributor cap
Rotor
Coil

I have spark at the output of the coil but nothing coming out of the distributor spark plug lines

Any ideas as I'm now stumped!?

Thanks in advance!
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  #2  
Old 08-05-2017, 11:46 AM
Ben Ben is offline
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Your kill switch lanyard is in place Right?
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  #3  
Old 08-05-2017, 12:12 PM
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TimothyEllis TimothyEllis is offline
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Boat: Mastercraft Prostar 190 1999 5.7l vortec
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Yeah checked the safety lanyard

Just to add my engine is 5.7 vortec tbi with electronic ignition
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Old 08-05-2017, 12:20 PM
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CruisinGA CruisinGA is online now
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didn't read closely enough
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Last edited by CruisinGA; 08-05-2017 at 12:50 PM.
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  #5  
Old 08-05-2017, 12:24 PM
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JimN JimN is offline
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Quote:
Originally Posted by TimothyEllis View Post
'99 Prostar 190 won't start. Just cranks and cranks with no sign of coming to life.
I've tried changing the following with known good units but no luck so far :
Changed plugs
DIstributor cap
Rotor
Coil

I have spark at the output of the coil but nothing coming out of the distributor spark plug lines

Any ideas as I'm now stumped!?

Thanks in advance!
Measure the resistance on the wire from the coil to the cap. Also, make sure the graphite button hasn't fallen out of the cap. I killed a starter when that happened and I was trying to get it to start in darkness.

Pull the flame arrestor and see if gas is spraying into the throttle body- if it is, open the throttle or remove the fuel pump fuse until you have spark- you would be dumping gas into the engine and fumes into the exhaust, which can ignite explosively.
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  #6  
Old 08-05-2017, 12:41 PM
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TimothyEllis TimothyEllis is offline
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Boat: Mastercraft Prostar 190 1999 5.7l vortec
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I measured 500 ohms end to end on the short lead from centre of the distributor to the coil.

I can see fuel coming out of the two injectors alternately.
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  #7  
Old 08-05-2017, 01:29 PM
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JimN JimN is offline
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Quote:
Originally Posted by TimothyEllis View Post
I measured 500 ohms end to end on the short lead from centre of the distributor to the coil.

I can see fuel coming out of the two injectors alternately.
Pull the fuel pump fuse and change the oil after you're done- the gas gets into the crankcase and dilutes the oil, which is a bad thing.

Scan for codes- I'm guessing that the IC (Ignition Control) module is bad, but check the cap to make sure the button isn't missing. I have seen this come in a separate bag, in the box with the cap. Also, make sure the rotor is touching the button.
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Old 08-05-2017, 01:31 PM
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TimothyEllis TimothyEllis is offline
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Boat: Mastercraft Prostar 190 1999 5.7l vortec
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I have read that the ICM can go bad on these motors but when that happens, fuel delivery from the injectors stops, but in my case I can see fuel being injected.

Could the ICM still be the cause?
As I mentioned there is no spark coming out of the distributor but there is spark going in from the coil??
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  #9  
Old 08-05-2017, 01:33 PM
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TimothyEllis TimothyEllis is offline
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Boat: Mastercraft Prostar 190 1999 5.7l vortec
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Thanks Jim. Our replies must have crossed one another
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  #10  
Old 08-05-2017, 02:01 PM
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TimothyEllis TimothyEllis is offline
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Boat: Mastercraft Prostar 190 1999 5.7l vortec
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I've tried to buy a obd code scanner but they're practically non existent here in the UK

Is there any other way to check for codes?

If the ICM was bad would I get a code?
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