jlinde Posted April 24, 2008 Report Share Posted April 24, 2008 I am trying to help a friend with his 90 STS which does not run on all 8 cylinders when warm. When I do the injector shut off test (from instrument panel) when warm 2 of the injectors don't decrease the rpm(cyl 4 and 7) Did this test 7-8 times to be sure. Pulled and checked the number 7 spark plug -looked perfect. When ign cable for #4 and #7 were taken away from distributor it was clearly felt. No ECM codes except the E052 for disconnected battery. Plugs, cables, distributor cap, heat sensors and tps as well as oxy sensors are all new. Around a year ago 1 fuel injector was replaced - Can it be so that even more injectors are bad (4 and 7) but all of them give the 'click sound' in the stetoscope when I listen to it. /Jan L Link to comment Share on other sites More sharing options...
This topic is now archived and is closed to further replies.