Mechanics

FORD RANGER ENGINE PROBLEM

1991 Ford Ranger • 160,000 miles

Eletrical problem to fuel injectors. With ohmeter, With ignition in the on position, reading both positives from leads to injectors.I've changed ignition control module, looked at wireing harnesses. Engine runs only with starting fluid shot into the air intake. What more should I be looking at.
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Jebber
January 23, 2013.




Engine cranking, did you visually check for spark at the spark plugs. The reason I asked, without rpm signal, no injector pulse. No spark.

I don't believe those codes would stop injector pulse.

By the way, good job on checking the codes.

JDL
Jan 31, 2013.
JDL: I visually checked spark at plugs. Also, engine runs off of starting fluid.I tested again with my analog meter set on DC Volts, neg. Lead on engine ground, pos. Lead on either lead of injector harness. With KOEO reading 12 volts.I connect neg. And pos. Leads of meter to both leads of injector harness and KOEO no volts, no sweep. Engine cranking, no volts, no sweep of meter. I'm clueless in 10 degree weather.I also had the battery disconnected overnight at one point. Would that erase codes from computer?

I thank you very much for your input!

Tiny
Jebber
Feb 1, 2013.
Not sure where to go from here? Two of my databases showed different meanings for one of the codes, which could possibly cause an issue. I'll try to double check?

JDL
Feb 1, 2013.
JDL: Thanks.

Tiny
Jebber
Feb 1, 2013.
The code 16 could be the issue? I would want to check pip signal from ignition module to computer. You would need sometime that would react to pulse. Not an analog meter. I can't use the procedure in my database, it says to use a break-out box.
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JDL
Feb 1, 2013.
JDL: Thanks for replying.I don't know what all that means, but I will keep trying. This 91 Ranger i've had since Dec. Of 90.

Tiny
Jebber
Feb 1, 2013.
If not a wiring circuit problem, I'd have to suspect the ignition module, for distributorless ignition. I hate to see you throw parts at it. I can't be sure?

JDL
Feb 8, 2013.

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