ELETRICAL PROBLEM TO FUEL INJECTORS

1991 Ford Ranger

Tiny

JDL

January, 31, 2013 AT 10:35 PM

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.

Tiny

jebber

February, 1, 2013 AT 4:50 PM

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

JDL

February, 1, 2013 AT 5:24 PM

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?

Tiny

jebber

February, 1, 2013 AT 5:57 PM

JDL: Thanks.

Tiny

JDL

February, 1, 2013 AT 8:56 PM

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.

Tiny

jebber

February, 1, 2013 AT 9:22 PM

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

JDL

February, 8, 2013 AT 5:46 PM

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?

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