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Discussion Starter #1
I recently bought a 07 sportsmen 500 and it wasn’t running I have ran threw everything I can think of, I have tested all sensors, checked timing twice. Camshaft has little wear on it but still is spec at 32 mm lopes, unit cranks over but backfires threw the intake, compression is at about 120psi. Contacts on the throttle is not touching , has a new fuel pump and fuel filter but still can’t get it to start. Does anyone have any ideas
 

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Backfire through the intake usually indicates a lean mixture condition. I would initially guess bad fuel, timing is off or fuel pump is defective. Should have about 45 psi fuel pressure.
 

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Discussion Starter #3
I know it’s not timing but I’m gunna check fuel pressure this afternoon I have the head off right now due to me checking everything up top making sure it was all in spec should I check fuel pressure in between filter and injector? Or eliminate filter and go from pump to injector
 
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