Hi Everyone,
I'm new to the forum, but I've searched around quite a bit before posting here. I've recently purchased a 2000 Land Cruiser 90 Diesel and I've got a few issues that I'm having trouble resolving. I didn't see anything like these in your forum, but I did see a lot of detailed and intelligent discussion so I am hoping someone here can give me some help.
The first issue is the OBD Diagnostic port. I did not have a chance to test the OBD on this vehicle prior to purchase, and I'm finding it non-functional. The pin-out on the port doesn't match any posted standard. I had successfully tried out OBD readers on similar vehicles, so I'm curious to know if it is worth trying to rewire the port to match a known standard. Has anyone attempted anything like this? If not, how are DIY-minded folks pulling their engine codes?
Now here is the real problem. I am getting an intermittent Check Engine light shortly after I start up on colder mornings. Once the check engine light turns on, there will be a short period where I have very little power, and the automatic transmission shifts oddly. Aside from the odd transmission behavior, this seems like LIMP mode. If I leave the truck running for a short while, or just drive it cautiously, there will be a sudden change. The engine will surge as if I had stomped on the pedal and released, then the vehicle runs like normal for the remainder of the day. This first happened in November, and was most pronounced if the vehicle hadn't been driven for a day or two. Colder weather was worse.
I avoided driving it when I could, and ultimately changed out my fuel filter as a first step in problem solving. I had a new filter already since I planned to change it at 200K km, so I swapped it out early. My theory was that the fuel pump was struggling to build pressure, and maybe a clogged fuel filter was exacerbating it. Long story short, the problem went away with the new fuel filter.
Until it came back. 6 months and many miles later, the problem resurfaced Monday morning. Long weekend with no driving, the engine turned over about 6 times before starting and then my check engine light popped on. 5 minutes later, everything was fine; I stopped and restarted the engine and the light stayed out.
Now I'm thinking I'm back to my fuel pump. Maybe the new filter helped initially but it has slowly gotten a bit more clogged and the fuel pump has gotten a bit weaker? This is just a theory. I've got a bit of car know-how, but it is all based upon gas engines and this is my first diesel vehicle.
Has anyone ever heard of anything like this? I'm about to take it back to the dealer, but after my last experience I really don't trust them. They pulled some engine codes for me when my brake pump failed and tried to sell me 4000 Euros worth of parts and labor instead of diagnosing to figure out which part failed and replacing it. I was able to talk them into giving me the codes so I could do my own research and work that time, but I'm not confident I will be able to do that again. Any information you can share will be greatly appreciated!
Dan
I'm new to the forum, but I've searched around quite a bit before posting here. I've recently purchased a 2000 Land Cruiser 90 Diesel and I've got a few issues that I'm having trouble resolving. I didn't see anything like these in your forum, but I did see a lot of detailed and intelligent discussion so I am hoping someone here can give me some help.
The first issue is the OBD Diagnostic port. I did not have a chance to test the OBD on this vehicle prior to purchase, and I'm finding it non-functional. The pin-out on the port doesn't match any posted standard. I had successfully tried out OBD readers on similar vehicles, so I'm curious to know if it is worth trying to rewire the port to match a known standard. Has anyone attempted anything like this? If not, how are DIY-minded folks pulling their engine codes?
Now here is the real problem. I am getting an intermittent Check Engine light shortly after I start up on colder mornings. Once the check engine light turns on, there will be a short period where I have very little power, and the automatic transmission shifts oddly. Aside from the odd transmission behavior, this seems like LIMP mode. If I leave the truck running for a short while, or just drive it cautiously, there will be a sudden change. The engine will surge as if I had stomped on the pedal and released, then the vehicle runs like normal for the remainder of the day. This first happened in November, and was most pronounced if the vehicle hadn't been driven for a day or two. Colder weather was worse.
I avoided driving it when I could, and ultimately changed out my fuel filter as a first step in problem solving. I had a new filter already since I planned to change it at 200K km, so I swapped it out early. My theory was that the fuel pump was struggling to build pressure, and maybe a clogged fuel filter was exacerbating it. Long story short, the problem went away with the new fuel filter.
Until it came back. 6 months and many miles later, the problem resurfaced Monday morning. Long weekend with no driving, the engine turned over about 6 times before starting and then my check engine light popped on. 5 minutes later, everything was fine; I stopped and restarted the engine and the light stayed out.
Now I'm thinking I'm back to my fuel pump. Maybe the new filter helped initially but it has slowly gotten a bit more clogged and the fuel pump has gotten a bit weaker? This is just a theory. I've got a bit of car know-how, but it is all based upon gas engines and this is my first diesel vehicle.
Has anyone ever heard of anything like this? I'm about to take it back to the dealer, but after my last experience I really don't trust them. They pulled some engine codes for me when my brake pump failed and tried to sell me 4000 Euros worth of parts and labor instead of diagnosing to figure out which part failed and replacing it. I was able to talk them into giving me the codes so I could do my own research and work that time, but I'm not confident I will be able to do that again. Any information you can share will be greatly appreciated!
Dan