So, I'm still tweaking it. After getting the #2 plug cleaned up and adjusting the valves it wouldn't want to go over 3000 without missing, or maybe it was knocking. I ran some seafoam into the vacuum line and it seemed to help a tad, I think the carbon built up in there causing it to burn the fuel at the wrong time. On Friday I adjusted it so that the idle mixture screw is way in and readjusted the timing by ear. It is still off, but it runs. But the clutch is getting worse I think and don't have the time or money to do anything about it right now. Of course I do have a spare clutch and pressure plate, problem is I need the car to get to work and my wife needs the Trailblazer. The summer is already busy enough. Not only does the clutch plate need replaced, but so does the shifter linkage, the seal for the shifter and possibly the main rear seal.
Sometimes I wish I had a new car that didn't have problems and I didn't have to worry about this. AC would be nice too. But, I don't and it will be at least 3 years before we buy another one. So the 02 will have to make it and I'll have to find the time to tear it apart again.
Sunday, May 30, 2010
Thursday, May 6, 2010
Tuning Update
Over last weekend I tore into the car a bit. I was tired of the rough running, wobbly engine and the sucky 19 mpg that I had been getting. First step was to see if I could get the car to start easier and take care of the surging problem when I know the timing is right. So off comes the top of the carb (Weber 32/36 DGAV) and I get down to the float, apparently this thing can cause all sorts of issues if it isn't set right. Well, mine was set around 30mm, should be 41mm. So I got that set correctly. Just had to bend the floats down a bit. I put the top piece back in place and then went for the choke. I'm pretty sure it had never worked properly. I started by lining up the marks on the choke and the carb and then tweaking it to where it actually closed the flaps at the right spot. Then I adjusted the screw to stop the linkage at the right spot for high idle, it was backed out to where it wasn't even touching before.
The next day after letting the engine cool over night I pulled the plugs and the valve cover. #2 plug was fouled, that explained the rough running miss firing engine. But why? I put the car in fifth gear and starting rolling it to adjust each of the valves to .006. When I got to #2 intake, there was no gap, when I loosened the nut it actually came up some. I think it was too tight, not letting it close all the way. With all of them set, I cleaned up the plugs, put them back in and went for the timing.
First I put the carb to the proper setting than got the timing set to the "dot" on the flywheel. My car is one of those that doesn't have the marks on the pulley. Then I set the carb to where it was running smooth and sounded good. Took it out for a drive and was very pleased by how much smoother it was. Lacked power though.
On Monday I tweaked the timing a little to bring the power up and haven't touch anything sense. It has been great. My biggest issue with it now is getting the high idle to set when it is cold.
The next thing I need to work on is the transmission. It still leaks, hopefully a seal for the shifter will fix that. Also the clutch is slipping, luckily I have a new one, just need the time to tear it apart. Also the right front brake is squeaking. Probably need better pads up there.
The next day after letting the engine cool over night I pulled the plugs and the valve cover. #2 plug was fouled, that explained the rough running miss firing engine. But why? I put the car in fifth gear and starting rolling it to adjust each of the valves to .006. When I got to #2 intake, there was no gap, when I loosened the nut it actually came up some. I think it was too tight, not letting it close all the way. With all of them set, I cleaned up the plugs, put them back in and went for the timing.
First I put the carb to the proper setting than got the timing set to the "dot" on the flywheel. My car is one of those that doesn't have the marks on the pulley. Then I set the carb to where it was running smooth and sounded good. Took it out for a drive and was very pleased by how much smoother it was. Lacked power though.
On Monday I tweaked the timing a little to bring the power up and haven't touch anything sense. It has been great. My biggest issue with it now is getting the high idle to set when it is cold.
The next thing I need to work on is the transmission. It still leaks, hopefully a seal for the shifter will fix that. Also the clutch is slipping, luckily I have a new one, just need the time to tear it apart. Also the right front brake is squeaking. Probably need better pads up there.
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