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Old 04-12-2011, 09:32 PM
ERanger03 ERanger03 is offline
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Posts: 5
Default 03 3.0 flexfuel New heads and misfire

Need Help.
Just replaced my heads valves and springs. Put it all back together and went to start and it is misfiring.
Ive checked the wiring as described in the Hayes manual
3 4........... 3 6
2 6........... 2 5
1 5 .......... 1 4
front coil / Block front

Is acting like a misfire, Ive checked coil, wiring , plugs and no luck
I did change wiring from block #4 cyl and put on coil #5 port
and #5 to #4 (swapped 4 and 5 on the coil pack)
Truck started.
Is this a misprint in Hayes?
Am I right to leave it like this?
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03 Ranger Flexfuel 3.0L AT All Factory No Mods

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Last edited by ERanger03; 04-19-2011 at 06:13 AM.
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Old 04-19-2011, 06:20 AM
ERanger03 ERanger03 is offline
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Default Re: 03 3.0 flexfuel New heads and misfire

Well I figured it out on my own.
It looks like the Hayes manual is kinda wrong.
The firing order is right but the diagram they show for the coil pack is incorrect.
Hayes shows the diagram at bottom left to be #1 with the coil pack from left to right with the right side indicated as the front of the motor 1,2,3 and the top bank from left to right as 4,6,5.

456
123 front of motor

when in fact the AC Delco (factory coil pack) is as follows

321
465 front of motor or coil pack

when i changed the wiring as described in first post i was firing and getting the motor to start but it was firing on the exhaust stroke.

Hope this helps someone.
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