My poor truck....I don't know what can be said of it. It's done me well, but it is starting to suffer from more severe and ore frequent mechanical ailments. I have solved my recent cooling issues, electrical issues, drivetrain issues (snapped spline on the driveshaft, actually
), etc. The real pain is that I haven't done any of this damage while 'wheeling. I expect to have to fix stuff after a trail run, but not on my way to work.
Anyway....here's my latest problem and it had me baffled so maybe someone else might have some ideas. I've devloped a rather nasty low RPM miss....between 800-1500 RPMs, but only when idling and not under load it seems. That itself wouldn't bother me, but on the way up the hill in Duluth yesterday after the rain, I took off from a stoplight. Wet concrete, Super Swampers, and a welded differential don't do so hot together so I sat and spun a little until I had enough torque to pullthe tires in second gear which dropped my torque to stop spinning....kind of a catch-22. Well when I hit second gear I had a MASSIVE miss. We're talking the kind that makes you think you're going to see con-rods real soon. It missed all the way into the Cub Foods parking lot where we parked and went in shopping. On the way back down the hill it seemed fine, but I was engine braking the whole time so it really isn't a fair comparison.
This morning I thought I would start fixing it by replacing the easy stuff. It has a new cap, rotor, plug wires, and plugs. I ran some ATF through the throttle body and down to the injectors to clean them via a vacuum hose (a neat trick that works rather well). I checked my valve lash and found it to be just slightly on the loose end of spec. The fuel filter is new as is the tank, sending unit, pump, etc. Compressions are low (it's tired), but even across three of the cylinders. The 4th cylinder leaks down slightly and has forever. I know I need a new headgasket at some point, but it's not using water through there yet so it can't be THAT bad. EVERYTHING seems normal to me. But I still have that low RPM miss......
Anybody out there see something that I'm missing here? I'm hoping to do the 7mge (Supra I-6) swap next year, but I need to make it that long first