Did you try this during the last no start?76was124 wrote:If it was me, I would follow ORFORD2004 advice to 100% rule out lack of fuel. It's an easy test to spray starter fluid in the intake when it won't start. If it starts, a noid light on the injectors will tell you whether its fuel delivery or injector electrical circuit. ( dual relay etc).ORFORD2004 wrote:Next time it happen, try spray carburator cleaner in the intake. If it start, then you know that the problem is not ignition. Check voltage at the pump when cranking. No voltage, check the switch in the AFM and the double relay.
Also, I don't see in either thread that you checked the AFM...does the flap move freely?, does it ohm out correctly at the ECU connector? You stated you have had backfires which can bend the flap and/ or blow out the disk in the flap ( if it is the type that has a blow-out disk,)