When I'm driving, even if I'm keeping a constant speed, the transmission will jerk or punch at times. The van has 190k miles on it, and I got it 10k miles ago. Is it possible that it could just need a transmission flush? I don't have any problem with power going to the wheels during acceleration. Also, I think I checked the fluid before, and it seemed fairly red. I hope it's not the computer causing the issue, but then again, the engine isn't reporting any codes against the transmission. Would the check engine light report on a transmission problem?
I fixed several components on my A/C system since I got the van (orifice tube for front A/C, expansion valve for rear A/C, plus the high-side pressure valve), and the A/C worked greatly for a while. Now, for some reason, the fuse supplying power to my A/C clutch blows almost immediately when I turn it on.
When I supplied direct power to the clutch, it engaged without a problem. What I did to fix it was run a new wire from the relay in the fuse box to the clutch since I thought it might have been a bad wire. When I turned on the A/C from the cabin, the computer would activate the relay and supply power to the clutch, causing it to engage. This worked for a day or so, and then it started blowing the fuse again. I thought maybe since my hookup didn't use the A/C diode that maybe that was the problem. So this morning I ran the diode in line with the power wire to the clutch (I couldn't figure out which wires under the relay box connected to the diode plugs), but still the same thing happens. If I supply direct power to my new clutch power wire, it still engages without problem. Also, when the clutch engages, my A/C blows nice and cold... only until the fuse blows. What could be causing this to happen?
The next thing I'm considering doing is a two-step A/C system. First I would press the A/C button in the cabin to allow the computer to raise the RPMs. Then I would have a power switch hooked up directly to the clutch to engage it with a fuse in line. Would this be fine to do? I plan on running this van until it dies, so I'm not worried about reselling it. I just want my A/C clutch to work so I can have my A/C back. Any help would be greatly appreciated!
I tried what you suggested by disconnecting the clutch and then turning on the A/C, and it did blow the fuse still. I guess I'll have to check behind the dash now. Thanks for the suggestion. Is the switch the only thing that it could be? Is it normal for those to go bad?