help with no spark problem

[daveyscoty]

l have a 91 4x4 with a 4.0 last time I took it wheeling it stalled out with no spark problem....recently bought new ignition coil, wires, plugs, and crankshaft sensor and still no spark...need any kinda info please

 

[natenkiki2004]

With those items replaced, it's either the ICM or the wiring between the crank sensor, ICM, coil and/or ECU.

 

[daveyscoty]

ok thanks I'll check the wiring and do tests tomorrow......hope I find the problem miss my explorer very much

 

[natenkiki2004]

Are you 100% sure it doesn't have spark? You can't test spark individually, they fire in pairs (front to rear) so all the other plugs/wires need to be installed to be able to pull a single wire off and put a spark tester in-line.

If you're knowledgeable with a multimeter, I'd start at the coil and make sure it's getting power/ground. If it is, then look at the crank sensor and follow it's wiring back to the ICM. Kind of do things in a flow.

 

[daveyscoty]

everything is connected properly...I'll check voltages in the am and hopefully figure it out...exploder doesn't look happy just kicking back

 

[xlt1993]

Have you checked all connections? Are the free of corrosion,dust,debris,and water? Check all grounds as well as you may have knocked a wire loose during your explorer-ation, I would also check all associated wiring within the ignition system just to be safe. Hope this helps. Best of luck.

 

[daveyscoty]

all wires clean with power to all of everything. ...still no spark idk what the problem still could be

 

[natenkiki2004]

You need to find out of the computer is controlling the coil pack. If it is then replace the pack. If not, work your way back to the crank sensor.

 

[daveyscoty]

exploder is back on the dirt roads but now a new issue