93 SR5, misfire, rough idle. No CEL

93bushbeater · 2015-07-14T21:51:11+00:00

Hello all, I am really hoping i can find help on this forum. I will try to keep it short. As the title states my 4runner suddenly started misfiring one day when I was out on a logging road so bad that I could not make it up the hills to get home causing my to pay for a $400 tow home. Several mechanics have come by and put their 2 cents in. Symptoms: Extrememly rough idle (somtimes sill stall) Smell of gas occasional backfire excessive shaking of the entire vehicle What I have done: Plugs,wires,rotor,cap fuel filter VAF sensor battery One thing that is blowing me away is that no matter what I do the car will not throw a CEL, I can disconnect my VAF sensor pull plug wires and no CEL. I had suspected fuel as the culprit as I beilive there is rust in the gas tank but I want to be sure before I go down that road. Does anyone know of a way to 100% throw a CEL so that I can confirm my ECU is working? I know that if I had a bad ECU if would cause my symptoms. On that note, the light illuminates when i turn the key and I can enter self diagostic mode by shorting the pins inside the diagnostic port and this still does not pick up any faults. Any input would be much appreciated, i want to get this bad boy back on the road.