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Old 07-26-2010, 17:06   #1 (permalink)
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Question 89 ranger Dual Plug input control code

I am a newbie and need some expertise

1989 Ford Ranger 4 Cyl 2.3L, 5speed 4X2 Dual plug ignition

The induction side spark plugs are not firing at all at any time.
The engine runs continuously on the right side spark plugs.
My KOEO codes are:
33 - EGR Valve opening not detected
41 - No HEGO switch detected
88 - Loss of Dual Plug input Control
My Engine Running codes are:
98 - Hard Fault Present
88 - Loss of Dual Plug input Control

What I have accomplished so far:
New Plugs
New Wires
New ( both) coil packs
New DIS Ignition Module

Still the driver's side coil pack does not produce a spark.

The quick connector harness wires that plug into the driver's side coil pack don't appear to have any electrical current flowing while the truck is running.

The hard fault code (98) is probably referring to code 88.

How can i troubleshoot further back to find the problem?
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Old 07-26-2010, 17:22   #2 (permalink)
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Re: 89 ranger Dual Plug input control code

Here's a good write-up on it. My Ford 94 Ranger has an intermittent check engi... - JustAnswer
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