So as the title states, I have a 98 k2500 rclb Silverado with the l31 5.7 and nv4500. Bought the truck in January with 198k miles in pretty good shape, did full fluids change, fuel filter, one front hub, oil change, coolant swap to uni green, new thermostat/radiator, cap and rotor, etc. Just little stuff here and there, new brake pads, brake lines, adjusting rear brakes, t case output seal otherwise very reliable and fun to drive. Never lost any oil according to the dipstick either.
Recently did the spider to mpfi conversion and that truly did help drivability and engine issues smoother and starts easier. Also haven't seen the lean bank 1 and lean bank 2 codes since. While there are several marks and indicators the engine had been out before I bought the truck like the guy told me, the intake was very carbon packed which leads me to believe it's a higher number that 30k I was told.
Last night driving home from grocery shopping after work the truck started stumbling and missing but no codes were thrown at the time. No power on acceleration and rough idle at lights. The truck ran perfect all day and never gave any indication that something was wrong.
After limping the truck home and checking checking fluids and wires, I found that the oil was low, about 2qts, and the sparkplug wires were all still good along with the other wires for sensors, etc looking good. Added oil to full mark, oil change is this week anyways, and tried to use torque to watch things with fuel trim and misfires.
Also tried to isolate cylinders by disconnecting sparkplug wires one at a time. Cylinders 2 and 4 were the only ones that when disconnected, the idle didn't change. Honestly it felt smoother with either of those disconnected. The map sensor in the intake was missing it's gasket when I changed the injector assembly so I purchased a new one of those and tried using o rings to seal it until the correct gasket came in so that's a known possible vacuum leak. I plan on disconnecting the battery and changing that this evening after work. After that I plan on pulling the plugs from 2 and 4 and seeing what they say. I ordered new plugs and wires from rockauto this morning just so I could change them.
Accidentally broke the temp sender last night so I ordered one of those as well. At the end of the night messing with it in the cold and dark these are the screenshots from torque. I ordered a new Bluetooth adapter yesterday that will hopefully let me use dash commander as well.
Any tips or tricks or advice would be very helpful. I'm decently handy and have done all the work myself. I know I should've done lower intake gaskets but haven't had issues before and have been pressed for time and money between college and work and a baby on the way.
Recently did the spider to mpfi conversion and that truly did help drivability and engine issues smoother and starts easier. Also haven't seen the lean bank 1 and lean bank 2 codes since. While there are several marks and indicators the engine had been out before I bought the truck like the guy told me, the intake was very carbon packed which leads me to believe it's a higher number that 30k I was told.
Last night driving home from grocery shopping after work the truck started stumbling and missing but no codes were thrown at the time. No power on acceleration and rough idle at lights. The truck ran perfect all day and never gave any indication that something was wrong.
After limping the truck home and checking checking fluids and wires, I found that the oil was low, about 2qts, and the sparkplug wires were all still good along with the other wires for sensors, etc looking good. Added oil to full mark, oil change is this week anyways, and tried to use torque to watch things with fuel trim and misfires.
Also tried to isolate cylinders by disconnecting sparkplug wires one at a time. Cylinders 2 and 4 were the only ones that when disconnected, the idle didn't change. Honestly it felt smoother with either of those disconnected. The map sensor in the intake was missing it's gasket when I changed the injector assembly so I purchased a new one of those and tried using o rings to seal it until the correct gasket came in so that's a known possible vacuum leak. I plan on disconnecting the battery and changing that this evening after work. After that I plan on pulling the plugs from 2 and 4 and seeing what they say. I ordered new plugs and wires from rockauto this morning just so I could change them.
Accidentally broke the temp sender last night so I ordered one of those as well. At the end of the night messing with it in the cold and dark these are the screenshots from torque. I ordered a new Bluetooth adapter yesterday that will hopefully let me use dash commander as well.
Any tips or tricks or advice would be very helpful. I'm decently handy and have done all the work myself. I know I should've done lower intake gaskets but haven't had issues before and have been pressed for time and money between college and work and a baby on the way.
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