VSCCA – Jag Event, Day 2.
Saturday morning, I'm out at 9:00 a.m. Car ran pretty good, with just a slight misfire. I don’t think I was pushing hard, and my best time was a 1:18.5. Since the only thing I hadn't adjusted on Friday was the coil, when I came in I replaced my NAPA coil with a Lucas Performance coil.
Then I go out for the second Saturday run and misery returns. This is it:
You don't need to watch the whole painful video. Misfire very apparent at 0.17 when I try to accelerate for the green flag and at 1:01 as I try to go up the no name straight. If you can see my tachometer, I have a very hard time getting much over 3,500 rpm, and it sounds terrible as well. It was like I was running on three cylinders. So just about the entire field gets to pass. Best time was a 1:20.9
So I come back in. I roped a fellow Honda S2000 enthusiast into helping me put in a third coil and then pull the distributor to double check the points. We tweaked the adjustment a bit. Then we went to see my nemesis to ask to borrow a condenser. But I’m running a different distributor, so he showed us a trick to test the condenser. My friend supervised the testing of the two condensers that I had, and we re-installed the condenser that I had taken out on Friday.
As I start the car up to go out for the third run, its not sounding too good even in the paddock. So I’m starting to worry that I’m doing damage to the engine. Still, I go out and it's just as bad. My best time on that run was a 1:20.061.
So for the last run, I decide just to mix in some 110 octane fuel. I also changed three of the four spark plugs, just to keep myself busy more than expecting a cure. Because, now I’m back to believing that my ignition is OK and that my problem is fuel starvation – caused by the extreme heat perhaps.
On track for my final run, I feel that there is no change - except, suddenly on the last two laps, the misfire does abate by about 50%. I ended up a lap down, but did manage a 1:17.891, probably in the last lap.
In hindsight, I shouldn't have run under the misfire conditions. I’m concerned now that I’ve done some internal damage to the motor. It's quite possible that with the extreme heat and my higher than historical revving of the engine, that the exhaust manifold heat was boiling the fuel in my float bowls. I just hope I haven't figured that out too late. I could have burned a hole in the piston or in the exhaust valve. I'm not sure the car sounds so great anymore, even at idle; and when I started the car to put it on the trailer, it started with a big puff of blue smoke, something I had never seen before. Perhaps that signifies a broken piston ring.
So at this point, my plan is as follows: First I'll do a compression test and hope for the best. If that checks out OK, I'll look for some rigid insulation to add to my heat shield; and perhaps I'll wrap the exhaust manifold and maybe the fuel float bowls with heat wrap insulation. Then I have to try to check my fuel delivery system.
The only other option is bad ignition wires – but I doubt that.
But here's an interesting picture, much more arty than usual. Photo by Robert Rightmyer, Valley Visions Photographs
