Service Engine light
03-21-2018, 09:56 PM
#21
If it sat for 2 years with fuel in it, then that could explain a fuel injector issue. Injectors are cheap, and I wouldn’t hesitate to put in a used one. It may not be worth the effort to investigate further into the bad injector, but I think I would change the fuel filter!
03-28-2018, 07:58 PM
#22
So I ordered a "new" set of 42 lb marine injectors off of a store on ebay for $80 compared to the $509 I found on amazon. The misfires are down to a minimum and the service engine light is on no more....Also the torque converter is locking up now so mission accomplished there. BUT of course, another problem. I replaced the injectors with the same exact 42 lb marine injectors I took out. My truck ran fine at idle and WOT but now I have an extremely lean condition. Truck hardly wants to sit and idle at all. I can play with the pedal and get it to clean up but still goes completely lean and detonates when giving it decent throttle. I've added up to 15% more to my VE table (not sure if I should've or not) and it still didn't fix the issue. Only thing I can think of is when I pulled the injectors from the rail the fuel poured out onto the top of the intake and most likely into some of the cylinders as well. Maybe fouled out some of the plugs???
03-29-2018, 09:47 AM
#24
It looks at crankshaft acceleration/deceleration and compares the timing of that event to the firing order to determine which cylinder is disrupting the pattern.
It cannot tell the cause of the misfire, however all misfires cause the O2 sensors to read lean as there is excess oxygen in the exhaust...remember that since the O2 sensors can’t read fuel even rich misfires read lean at the sensor.
It cannot tell the cause of the misfire, however all misfires cause the O2 sensors to read lean as there is excess oxygen in the exhaust...remember that since the O2 sensors can’t read fuel even rich misfires read lean at the sensor.
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