1994 Ford Ranger Truck Stalls after 15-20 minutes

Today, I measure the prinary resitance in both coils they are.6 Ohms needs to be between.3 and 1 ohm. Secondary measured 13.5Kohms recommended is 6.5Kohms to 11.5Kohms will it it make a difference? Also what resistance am I suppose to measure for each of the spark wires? I made sure Ihave good grounds but truck die after 20 minutes again.

I have not done a spark test when truck dies because I dont have a pair of insulating pliers. What is the purpose of the PCM Diode? Where can I get the measuring voltages and resistances for the various components under the hood?

I will donate for the cause of the page shortly I am just short of funds at the moment payign unecessary fixes.

Thank you

Hi, thank you for the reply. My Ford Ranger Super Cab XLT 4Cyl. 2.3L has a DIS distributorless engine. The ressitance I gave you previously was for the ignition coil packs (dual). The resistance between primary coils is whithin spec.6 and calls for.3 to 1 Ohm. However the resistance for the secondaries is off, I measured them to be 13.65 Kilo Ohms but the spec calls 6.5 kilo Ohms to 11.5 Kilo Ohms. Would the 2 extra kilo Ohms make a difference? Specially if the coils get warm after 20 minutes of running the truck? I will get an extra spark plug today and plug it at the end of a wire today and see if I have a strong blue spark if that is the case do you think I shall then look at the Fuel Pressure Regulator, IAC, ECT, MAP sensors or a clogged EGR or Fuel Injectors. It seems like there are alot of people out there with the same truck symptoms but so far I have not found a definitive answer to the problem. I will post my results on whether I have a strong spark or not, in the mean time I would appreciate if you very for me the resistance for the ignition coil pack and whether teh ones on my truck need to be replaced? Thank you Jay

Here is what I did at lunch time,

I run a KOEO test and got two codes:

#222 Distributorless Ignition System Loss of Right Ignition Monitor(IDM Signal)
&
#327 EGR Valve Position Circuit Below Minimum
#327 also means EVP/EPT Circuit Below Minimum Voltage

Is #222 Pointing at a bad ignition coil?
Is #327 Pointing at a bad DPFE Sensor? From what I learn so far this is the only place that the PCM gets feedback to check the pressure differential which is reflected as a voltage change.

I was told that the ICM Ignition Control Module "must" have the four screws for good ground. The one on my truck only has three. Could this be also shown as #222?

Thank you again,
Jay

Trickyeve,

did you ever find out what the problem was? I think I have the same identical problem. I replaced the DIS and the plug wires. I no longer have a CEL but after about 15 minutes of driving the car just dies on me. I pull over to the side and then it will start right up. I drive some more and it dies again. I continue this until I get where I need to go.

Checking my coil secondary resistance I get the 13.5K as you did. Just wondering if you were able to find out what was wrong.

Thxs!