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Old 08-13-2008, 02:53 PM   #1
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Default Intake backfire before cranking.

I have the mspnp9495 and whenever i turn the key to the on position before a cold or warm (not hot) start, there is an intake backfire. It seems to be exactly 2 seconds after the key is turned to the on position and will occur before cranking. If i don't allow 2 seconds between key on and cranking, it will usually backfire while cranking. I have recently changed from 460cc injectors to 550cc injectors and the problem occurred with both sets of injectors. So i know it's not the injectors Any idea what may be causing this?

Thanks in advance,
Wes Wingham

I can attach my msq later when i get home.
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Old 08-13-2008, 03:13 PM   #2
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Go into the cranking settings and look at the prime settings. Disable it.
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Old 08-13-2008, 03:25 PM   #3
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I will try that when i get home. Now, when it says priming pulse, is it talking about fuel or spark?
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Old 08-13-2008, 03:26 PM   #4
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search ------ search.
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