2001 catera misfire

working on 001 catera, comp says multibal misfires on all cylinders but gives no dtc codes, car will run after warm up but is only getting 8 miles
to the gallon
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.