November 10, 2010 - One step forward, one step back.
Good news - the new tach works! Well, it works once you remember to actually connect the GM tach wire to the MG harness. Interestingly, it seems to read accurately. I didn't have an OBD-II scanner plugged in to read the exact engine speed to confirm, but the car seemed to be idling right around 1000 rpm cold and that's reasonable. I checked the idle at right around 900 after the drive the other day. Interesting - I'd heard the LS engines put out a "four-cylinder" signal, but I figured that was just because a lot of new fours use a waste-spark ignition and thus look more like an 8. Regardless, I'm not going to complain about it! That was easy.
I also spent some time on the brakes. A bit of fooling around and I managed to get rid of a big air bubble in the front of the master cylinder. Voila, a hard pedal! Nice and hard. But the front fitting on the master was still leaking. This will not do. So I pulled it off and yup, the flare looks deformed.
I figured this was probably the case on Sunday when I was bleeding the brakes, but I was hoping that tightening the joint would solve the problem. Of course it didn't, and in doing this I also damaged the seat in the master cylinder - that's it in the picture. No surprise here. Luckily, the seats can be removed so I'll just call Wilwood and order a replacement.
At the same time, I noticed that the master had a big F and R on the outlets. Now, from my understanding, there shouldn't be any difference between them. I did read a blurb in Hot Rod or Car Craft a while back claiming there was and that swapping the F and R lines around solved a soft pedal problem. I still don't understand how - but since I had to rebuild one of the lines to fix that flare anyhow, I figured I'd swap them. This means new lines for both the front and rear outlet, both pretty short but relatively complex. So now I'm back to no brakes at all. Still, I have a clear vision of the way ahead.
tags: brakes, tach, wiring |
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