ignition system problem 88 ford f150

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Jul 20, 2007 | 11:45 AM

#31

subford

Fleet Owner

Joined: Aug 2005

Posts: 23,667

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From: Easton,Ks

Quote:

Originally Posted by subford

I am going to go out back and pull Ignition Harness off a 88 and put a 88 Distributor in my Sun Distrib-A-Scope. Hook up the harness, a coil & battery to it with and with out a computer hook to it and do some tests with a Break-out box, scope, test light and meters.

The test set-up has good spark. Put three different test lights on the coil TACH terminal.

The Snap-On test light just glowed with no flashes and no change to the spark. It has a long type bulb in it.

A low cost Test light with a large bulb in it was Bright and flickering and the spark was good but you could tell some difference in it (Maybe I should have reduced the Rpm’s of the distributor).

A KD test light with a small bulb flashed with good spark.

Unhooked the Computer and the spark remained good with on change.

The only time I lost spark was when I unhooked the ground wire from the distributor.

Jul 23, 2007 | 02:04 PM

#32

pmipmatt73

Thread Starter

Freshman User

Joined: Nov 2006

Posts: 43

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problem solved. grounded out wire somewhere is what they told me. i havent looked at it yet though.

thanks for all the help man it really sucks that it turned out to be a grounded out wire but o well. brand new ignition system! hehe