On Friday last week I picked up my 2000 SR5 manual from the tire shop. Got home, realized I forgot something, and jumped back in the truck, but as soon as I started up and began to roll I could tell there was something wrong. Engine felt rough and with a manual you can really tell when there's a power loss.
A few minutes later, check engine light came on. P0300 and P0302. Interestingly enough, once I got on the gas to merge into traffic I felt the roughness disappear and had full power. Truck ran fine after that for about 10 miles and 2 trips.
Then yesterday, ran to the store and after about 20 minutes was back in the truck.
Started up, and again engine was rough, but this time, no codes. Drove about 6 miles home, rough all the way, no codes, no check engine.
Last night I pulled the spark plug from the #2 cylinder and everything looked good. These plugs have about 20,000 miles on them, and I do have a supercharger so it can be hard on plugs.
Ordered new plugs anyway, and am going to run Lucas lube and injector cleaner tonight.
My question at this point is: Does the sporadic nature of the performance degradation, and the fact that it only comes on when the truck is "hot started" give any hints as to whether it is:
- Plugs
- Wires
- Injectors
- Coil packs
- Head
