1987 Jeep Cherokee pioneer, all gauges don't work

as you already know its not the original radio i would suggest it may well not be the correct model radio for the vehicle, check in your car manual for the radio type you should have in your vehicle

no idea at all what that means.
the story is for sure longer seeing how its not stock.
and how it got that way.
gee.
what you do is go to the store, any auto store, even walfart
buy the adapter kit,
now it just plugs in , but wait the connect has pig tails
sure it does, it must
then go to pioneer.com and bet the free manual
then read the page on wire names.
and match the kit
its that simple. done many. actually ever-which way and ham radios too.

Misfires and backfiring through the intake is usually caused by incorrect ignition timing.

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did you replace the ECu with a used one or new. if it a used one did you match it to the old.why di you change the ECU.? when you turn the key in the start position does the fuel pump turn on? does it crank? do you know if there is spark if you pull one spark plug wire?

when you state it wouldn't crank, do you mean the starter won't engage or that it just spins over and doesn't start? if no gauges or no starter engagement, then check the battery, battery connections,and the starter for excessive amperage draw. if the starter spins and the engine won't start, then check crankshaft position sensor first. the crank sensor is a more common failure than the distributor or any of the other things you mentioned.

You may have a faulty ignition coil. Check to see if system is firing when it won't start. If you have fire it is probably fuel pump.

Pull the fuses and check the socket for power on the things that don't work. If there is no power at the fuse box there is a good change the stater igintion switch is toast. it is located on top of the steering colunm under the dash.usally less then 20 bucks All that you mentioned get power from this switch that goes to the fuse panel when you turn the key on

jeep cherokee laredo 1987 problema que cuando suve una pendiente empiesa a vibrar.

Loose or dirty ground connection at battery area.

Radiator may be plugged up inside or a bad headgasket. Try the radiator first since it is far easier.