I tried to do diligence and search the site but haven't found a viable solution to my woes. I have a 93 RRC LWB with 83K and yesterday it was stalling out at stoplights when warm. Today same thing, then at one light the RPM hopped around with no gas pedal pressure and then stalled out with a check engine and code 23. I know the code is a fuel pressure system issue. But what is the Test 20 of the continuity test? I also tried to clear the code about 5 times with no luck, so I need to attempt a remedy - as usual, I appreciate the experienced genius of this forum.