Babyfood1217
Member
'02 Sport Edition
335k on the clock.
Pretty well maintained, but not as much as I could (should?). Using it as a work vehicle, and to facilitate a long distance relationship, has racked up a lot of miles in the past 2 years, and kept my ability to really tinker with a it to a minimum. So of course, as my partner and I close the gap and finally move in together (yay!) and I do ALOT more driving for the work thing (not yay), it's now that various issues start to rear their head. Lets say I have three issues I'm concerned about...
P0440/P0442
- first happened +6 mo's ago, ish. Tightened the gas cap, cleared code(s), drove away without issue. Came back maybe a month later, starting reading about evap/vac/fuel hose issues, cleared codes. Come on more frequently as time progresses, and without having the bandwidth/capacity to identify every evap/vap/fuel hose, I got a new gas cap from the toyota dealer and crossed my fingers. Fine for a while, but came back a few weeks later. Cleared it, waiting until I am fully moved until digging into it more than checking codes and clearing them.
P0300
- Just got back from 4.5 days away taking a moving truck to the new place, the 4Runner sat in my drive the whole time. Started it up so I could move it/make room for the moving truck again, and immediately it was stuttering. No CEL, though. A tap of the gas pedal meant more stuttering, but then it started to smooth out. Shifting to "Drive" continued the stutter, but again, it begin smoothing out. After letting the engine run for approx. 2 while plugging in my OBD reader and running a test, the engine was back to running smoothly. Despite no CEL, there was a p0300 sitting in the system (along with a p0440).
Unknown pulsing/soft knock
This has been happening (or I've been noticing?) it for a couple of months. A very quiet pulsing/soft knock is noticeable when driving. It has to be a very smooth road, otherwise road noise drowns it out (mostly). It seems to match (or be close?) to the RPM of the wheels, and I can't isolate whether it's front or rear. Happens when driving straight and when turning. No visible leaks from axles or diffs, CV boots are intact. When I did a drain/fill of the transmission a couple weeks back, I yanked on the front wheels when they were lifted and didn't notice any unusual play. Haven't check diff. fluid levels though. Vehicle shifts just fine. U-joints were greased when I did the transmission fluid work.
So...
There's other little things, but these have me the most worried, especially the p0300. I'm losing garage access in the move, and will be relegated to driveway spot repairs only, and will need to minimize downtime when I am able to wrench a bit. I've got plugs and wires on their way to our new place (part of planned maintenance), and as soon as I can twist my brain into understanding evap hoses and where to get them (or how to accommodate some being fully discontinued/unavailable), I should be able to take care of a couple possibilities. Diff/TC/fluid drain/fills are gonna happen with my next oil change once I'm at the new place too.
I've never done a compression test, but reading a few threads suggest that MIGHT be a place to start with the p0300, even if to fully eliminate it as a possibility.
Could the p0300 and the p0440/0442 be in any way connected, especially with such a high mileage vehicle?
If major work is needed (I'll have to find a shop, given no more garage), would it be worth it? When does a new/reman/rebuilt motor make more sense? Body/chassis/frame wise, the truck is in great shape. Little rust, and most everything works/looks how it should, despite its' age.
335k on the clock.
Pretty well maintained, but not as much as I could (should?). Using it as a work vehicle, and to facilitate a long distance relationship, has racked up a lot of miles in the past 2 years, and kept my ability to really tinker with a it to a minimum. So of course, as my partner and I close the gap and finally move in together (yay!) and I do ALOT more driving for the work thing (not yay), it's now that various issues start to rear their head. Lets say I have three issues I'm concerned about...
P0440/P0442
- first happened +6 mo's ago, ish. Tightened the gas cap, cleared code(s), drove away without issue. Came back maybe a month later, starting reading about evap/vac/fuel hose issues, cleared codes. Come on more frequently as time progresses, and without having the bandwidth/capacity to identify every evap/vap/fuel hose, I got a new gas cap from the toyota dealer and crossed my fingers. Fine for a while, but came back a few weeks later. Cleared it, waiting until I am fully moved until digging into it more than checking codes and clearing them.
P0300
- Just got back from 4.5 days away taking a moving truck to the new place, the 4Runner sat in my drive the whole time. Started it up so I could move it/make room for the moving truck again, and immediately it was stuttering. No CEL, though. A tap of the gas pedal meant more stuttering, but then it started to smooth out. Shifting to "Drive" continued the stutter, but again, it begin smoothing out. After letting the engine run for approx. 2 while plugging in my OBD reader and running a test, the engine was back to running smoothly. Despite no CEL, there was a p0300 sitting in the system (along with a p0440).
Unknown pulsing/soft knock
This has been happening (or I've been noticing?) it for a couple of months. A very quiet pulsing/soft knock is noticeable when driving. It has to be a very smooth road, otherwise road noise drowns it out (mostly). It seems to match (or be close?) to the RPM of the wheels, and I can't isolate whether it's front or rear. Happens when driving straight and when turning. No visible leaks from axles or diffs, CV boots are intact. When I did a drain/fill of the transmission a couple weeks back, I yanked on the front wheels when they were lifted and didn't notice any unusual play. Haven't check diff. fluid levels though. Vehicle shifts just fine. U-joints were greased when I did the transmission fluid work.
So...
There's other little things, but these have me the most worried, especially the p0300. I'm losing garage access in the move, and will be relegated to driveway spot repairs only, and will need to minimize downtime when I am able to wrench a bit. I've got plugs and wires on their way to our new place (part of planned maintenance), and as soon as I can twist my brain into understanding evap hoses and where to get them (or how to accommodate some being fully discontinued/unavailable), I should be able to take care of a couple possibilities. Diff/TC/fluid drain/fills are gonna happen with my next oil change once I'm at the new place too.
I've never done a compression test, but reading a few threads suggest that MIGHT be a place to start with the p0300, even if to fully eliminate it as a possibility.
Could the p0300 and the p0440/0442 be in any way connected, especially with such a high mileage vehicle?
If major work is needed (I'll have to find a shop, given no more garage), would it be worth it? When does a new/reman/rebuilt motor make more sense? Body/chassis/frame wise, the truck is in great shape. Little rust, and most everything works/looks how it should, despite its' age.
