The truck cranks over, it has spark, good fuel pressure, and compression, but it back fires through the intake

2000 FORD RANGER
16,000 MILES
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BUB2782
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I have a 2000 Ford Ranger with a 3.0 Flex Fuel engine, I recently replaced the cam synchro and now the truck backfires through the intake. I followed all the steps correctly that I found online. I'm not sure if I'm on the intake or exhaust stroke for tdc, or if it's something as simple as a bad relay. Any help is greatly appreciated.
Jun 22, 2012 at 6:20 PM
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DOCFIXIT
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Was special syncro tool used? if no damage will occure fuel injection will be offf. Must use tool
Dec 15, 2017 at 1:39 PM
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DOCFIXIT
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tool
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Dec 15, 2017 at 1:39 PM
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BUB2782
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yes the alignment tool was used, and all the steps on how to replace the synchro I found online were used, I'm just hopeing that it is something simple and stupid.
Dec 15, 2017 at 1:39 PM
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DOCFIXIT
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Why was syncro changed? what where symptoms? instructions used from Chilton or Mitchell?
Dec 15, 2017 at 1:39 PM