4.0 2009 random weak spark
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From: Raleigh, nc, usa
4.0 2009 random weak spark
Background, it dropped a valve. Pulled motor, new head and timing chains. Used otc tools to set timing. Checked and double checked I had it right. New plugs and wires. Removed injector relay and ignition fuse to crank to build oil pressure. Re installed those, cranked, missed really bad and shut off. Tried a few more times, same result. Verified fuel, stated on spark and with a tester want getting spark consistently, and sometimes not at all. Replaced crank sensor. No change, replaced plugs and wires again. No change. Replaced coil. No change. Where next. Only code it's throwing is the p0320.
2009 ranger 4.0
2009 ranger 4.0
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Senior User
Joined: Jan 2005
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From: Raleigh, nc, usa
Yes, replaced that, no change. Along with the crank sensor and the cam sensor.
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bpardo191
1987 - 1996 F150 & Larger F-Series Trucks
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Mar 10, 2017 11:41 PM
