99.5 Jetta TDI GLS 165K. Clutch 5K ago after release bearing failure. N75 5K ago after diagnostic tests proved it to be the culprit responsible for "control boost deviation" limp mode garbage. Occassionally running Speedtuning box.
I've got long cranking time. Had it a few months ago, but a new battery did the trick - for a while, but it came back. Recently - within the last week or so, I've noticed, especially with the cruise on, that I get these surge "burps", followed by black smoke out the ass - of the car. I'll be cruising along and feel a subtle jerkiness, like the car dozed for a second and then called up some power to keep up with itself, then I can barely see the car behind me. Fun with tailgaters, but I'm driving cross country next week ( and towing a trailer with 2 motorcycles), so the novelty is wearing off.
Today I went through a puddle 2 feet deep, car stalled out, and I had to push it out. Fun. Waited a bit and started it back up. The glowplug light was blinking and the cel was on. Hooked up the Vag, and there'd been a short of some kind. It dried out, I cleared the codes, and it ran fine.
Until I got on the highway a few hours later and started up a hill under load. Limp mode. I re-booted and tried to make it happen again, but no dice.
Hooked the Vag up again and noticed that I've got low MAP under load. I request 1948 (or something) and it gives me 1500.
Now, me and NutsnBolts cleaned out my intake about 60K ago, and I've been running it with the modded EGR setting to bypass it, so I'm thinking a clogged intake mustn't be the problem. We checked all vaccuum hoses to figure out the N75 problem about 2 months ago, so I think I'm all set there. I was going to switch out the MAF for one I've got in the garage, but I've got good MAF numbers, and I don't imagine a bad MAF would affect Manifold Pressure in that way. I've GOT a new turbo sitting in the garage. I could just switch it out and see what happens.
But I'd like your brains on the first, Diesel Geniuses.
Have at it.
B.
I've got long cranking time. Had it a few months ago, but a new battery did the trick - for a while, but it came back. Recently - within the last week or so, I've noticed, especially with the cruise on, that I get these surge "burps", followed by black smoke out the ass - of the car. I'll be cruising along and feel a subtle jerkiness, like the car dozed for a second and then called up some power to keep up with itself, then I can barely see the car behind me. Fun with tailgaters, but I'm driving cross country next week ( and towing a trailer with 2 motorcycles), so the novelty is wearing off.
Today I went through a puddle 2 feet deep, car stalled out, and I had to push it out. Fun. Waited a bit and started it back up. The glowplug light was blinking and the cel was on. Hooked up the Vag, and there'd been a short of some kind. It dried out, I cleared the codes, and it ran fine.
Until I got on the highway a few hours later and started up a hill under load. Limp mode. I re-booted and tried to make it happen again, but no dice.
Hooked the Vag up again and noticed that I've got low MAP under load. I request 1948 (or something) and it gives me 1500.
Now, me and NutsnBolts cleaned out my intake about 60K ago, and I've been running it with the modded EGR setting to bypass it, so I'm thinking a clogged intake mustn't be the problem. We checked all vaccuum hoses to figure out the N75 problem about 2 months ago, so I think I'm all set there. I was going to switch out the MAF for one I've got in the garage, but I've got good MAF numbers, and I don't imagine a bad MAF would affect Manifold Pressure in that way. I've GOT a new turbo sitting in the garage. I could just switch it out and see what happens.
But I'd like your brains on the first, Diesel Geniuses.
Have at it.
B.