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1991 ford ranger 2.3 no spark

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Old Aug 22, 2021
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From: Caldwell
1991 ford ranger 2.3 no spark

My truck recently died on me while heading to work. I tried testing for compression but my timing belt was shredded, I replaced my timing belt, crankshaft position, ICM, coil packs, wires, and spark plugs. They are all gapped correctly and they are in the right order It has no spark at all, please help. It also has compression.
 

Last edited by Decimus26889; Aug 23, 2021 at 03:42 AM.
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Old Aug 23, 2021
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Welcome to the forum

Only the exhaust side coil pack works when starter motor is active, just FYI, so don't use intake/driver side coil pack as the test for spark

Should be a Red/green wire at each coil pack and the ICM, that's the 12volt power from ignition switch key on, test that you have 12volts at any with key on

Best way to test for spark is to spray fuel, ether, gasoline, carb cleaner, ect........, into the intake and then crank the engine over
Called 50./50 test, been around since the 1890's and the first gasoline engine

Spark testers are a waste of time, lol

 
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Old Aug 23, 2021
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From: Caldwell
Originally Posted by RonD
Welcome to the forum

Only the exhaust side coil pack works when starter motor is active, just FYI, so don't use intake/driver side coil pack as the test for spark

Should be a Red/green wire at each coil pack and the ICM, that's the 12volt power from ignition switch key on, test that you have 12volts at any with key on

Best way to test for spark is to spray fuel, ether, gasoline, carb cleaner, ect........, into the intake and then crank the engine over
Called 50./50 test, been around since the 1890's and the first gasoline engine

Spark testers are a waste of time, lol
I tested that and went through a couple tests from this https://easyautodiagnostics.com/ford...nsor-tests-2#1 and my sensor reading from test 8 for ckp sensor stayed at 0.623, does that mean the new sensor is bad now, also my harmonic balancer is a little bent would that have anything to do with it going bad
 
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Old Aug 23, 2021
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1989 to 1994 2.3l has a Hall effect crank sensor so it should pulse 12volt on and off, when cranking engine over

So no 12v on/off means no timing pulse so no spark

Bent Harmonic balancer wouldn't cause crank sensor issue but will be an issue when engine is running, a vibration
 
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Old Aug 23, 2021
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From: Caldwell
Well I tested it both with the key on and off because it didn't specify but it didn't pulse with either, what could cause it not to pulse
 
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Old Aug 23, 2021
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Key has to be on, for all tests of the spark system, unless you are testing OHMs, then key can be off

The crank sensor reads a disc/cup attached to crank, was that in place?
New sensor comes with an alignment tool so the sensor can be placed in the correct position, so disc can rotate inside the sensor but not touch the sensor

Tool looks like this: https://www.toolsource.com/images/pr...200Wx1200H.jpg

Sensor with Disc/cup and tool seen here: https://i.ytimg.com/vi/iXHtbhPIl4U/maxresdefault.jpg

The disc has a missing section that pulses the Crank sensor when it passes by
Tool allows you to adjust the sensor so the cup part of the disc doesn't rub/hit the sensor as it spins
Tool is removed after alignment


 
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Old Aug 24, 2021
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From: Caldwell
I did have the disc/cup, I also aligned it with the tool. It scrapes the sensor when it spins because it is bent a little. I don't know if that is the issue, but it is a little irritating because the sensor is brand new.
 
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Old Aug 24, 2021
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So I am an idiot, it starts and i still gotta test drive it, but the crankshaft position sensor says to take the connector off the wires to remove it and install it, i accidentally installed the wires upside down, grey in top left was in bottom right. I figured it out because i thought maybe i didn't push the wires in all the way and then i looked and went wait a minute and checked my manual and i feel like an idiot, thanks for all the help troubleshooting it though.
 
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Old Aug 24, 2021
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Good work

Thanks for the update and THE FIX
 
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