91 xj runs good till wipers are turned on

Hey guys can you help me my 91 jeep was running badly replaced most all the sensors thought I had it fixed :yelclap:then was on a dusty trail and turned on the wipers to remove some dust and the jeep started running badly again ran bad most of the day (4 hours ) then started running fine so i need to know what to check and why the wipers would make it run badly :dunno:

I would throw a voltmeter on the battery terminals--looking for 12.5 volts static, 13~14.5 volts engine running.

If the voltage is Ok, I would then check the underside of the PDC to see if there is cross-corrosion.

If the headlights also make it stumble, check the ground strap at the back of the valve cover to the firewall.