not getting any spark at plugs

[delverde]

88 xj 4x4 auto w/air
list of all new parts in the last couple of months
tps,cps,cap and rotor,plugs,ing module and coil,fuel pump and filter new vac hose assembly high $$$,alternator,batt checks good,
ran good for a while now not getting any spark at the plugs
some days it will start some it wont. also changed the camshaft sensor inside the dist cap and reset timing

HELP!!!!!!!!!!!!!!!!!!

[Runnin'OnEmpty]

Jeepers. You've replaced about everything connected with a no-start condition.
You might try cleaning and tightening the ground connection on the passenger side of the engine block.

Also make sure of a secure connection at the CPS plug-in connector.

[cerealdaemon]

I had this same problem on my ZJ a little while back, it turned out to the the Crankshaft Position Sensor. Check that one.

[KarlVP]

Take your main computer connections apart. ( the plastic box above the brake booster) Drivers side.

Fill that thing full of brake parts cleaner, spray it out with air. May want to take a small wire brush to the connections to clean them up a bit.

Repeat several times, until there is no varnish on them.

Pack full with fresh di-electric grease.

Put it back together.

Enjoy.