I have a 3FE in my FJ40, but figured that there is a lot more 3FE knowledge here.
I have had the motor running for about6 months, all has been great. Idle was low, but otherwise it ran great. Tons of power, smooth running, etc. On a 700 mile trip last weekend, the low idle was causing problems with it not staying running in the single digit temps, so we adjusted it, and ended up a bit too fast, but didn't change it since it was our last day and I figured I"d correct it when we got home.
No problems all day, cruiser ran fantastic. Coming through Reno I was doing 75 easy keeping up with traffic. Did 60 over Donner summit. Faster then my 80 can honestly. However, about 20 miles from home, it started getting a miss, and stumbling. Major power loss, a hill that normally I go up without much speed loss, I couldn't keep it over 45... and it sounded ragged. I pulled over at the top of the hill and checked things out, didn't see anything disconnected. I pulled each plug wire one at a time, and each one affected it, so it didn't seem like a spark issue. It was too hot to mess with injector plugs, but I did check them when I got home and nothing was loose or damaged. I drove it home. No CEL.
The next day I checked wires and plugs to things, injector plugs, ect. I jumped the diagnostic port, and did get a code, code 51. That seems like it can be any number of things, so.... where do I start digging into this problem. Partly I suspect maybe an issue with the throttle position sensor, since we did mess with the idle a day before, but we just ran the little screw in a few turns... and it ran fine for most of two days before it had an issue.
Any ideas what I can check to start narrowing down the issue?
I have had the motor running for about6 months, all has been great. Idle was low, but otherwise it ran great. Tons of power, smooth running, etc. On a 700 mile trip last weekend, the low idle was causing problems with it not staying running in the single digit temps, so we adjusted it, and ended up a bit too fast, but didn't change it since it was our last day and I figured I"d correct it when we got home.
No problems all day, cruiser ran fantastic. Coming through Reno I was doing 75 easy keeping up with traffic. Did 60 over Donner summit. Faster then my 80 can honestly. However, about 20 miles from home, it started getting a miss, and stumbling. Major power loss, a hill that normally I go up without much speed loss, I couldn't keep it over 45... and it sounded ragged. I pulled over at the top of the hill and checked things out, didn't see anything disconnected. I pulled each plug wire one at a time, and each one affected it, so it didn't seem like a spark issue. It was too hot to mess with injector plugs, but I did check them when I got home and nothing was loose or damaged. I drove it home. No CEL.
The next day I checked wires and plugs to things, injector plugs, ect. I jumped the diagnostic port, and did get a code, code 51. That seems like it can be any number of things, so.... where do I start digging into this problem. Partly I suspect maybe an issue with the throttle position sensor, since we did mess with the idle a day before, but we just ran the little screw in a few turns... and it ran fine for most of two days before it had an issue.
Any ideas what I can check to start narrowing down the issue?