Re: Lack of Power, it's been a looooong trip!
The vehicle is a Ford E350 from 1986 and it has a Holley Carb on it.
It has been experiencing a lack of power and poor fuel economy, I can't really get it above 55mph on the highway.
When we were about to leave NY the Ignition Control Module failed, and after a few hours I had isolated the problem and replaced it. After this, the idle was much lower, and it would bog and try to stall off a stand still start. I adjusted the idle screw a tiny bit to try to solve the problem, and it helped - to an extent...the problem is a bit intermittent.
From Dallas, TX to Denver, CO, two problems with vacuum tubing came into play. I have attached photo's.
Figure 1 shows the replaced tube that swelled up and was leaking pressure, Figure 3-1 shows the replacement tube as well. It is a rubber tube that plugs into the intake manifold (figure 3-2 & 3-3) and extends off of the metal tubing that is connected to the transmission modulator. I replaced it, yet there was still a difference in power. A few hours later, when the sun was coming up, I couldn't take the lack of speed and power and pulled over in order to check out what was going on.
I found that some tubing had deteriorated, so I replaced that as well. This can be seen in Figure 2, as well as the replaced tube in Figure 3-1. The rubber tube that deteriorated extends off of a small metal tube that is just behind the EGR (as seen in Figure 4) and is routed into that sort of Flying Saucer type diaphragm (Figure 2 & 3-1). From there, the pressure is sent through two ports from that Flying Saucer diaphragm, one down the drivers side of the Crank Case into another diaphragm that is routed into the Heat Riser Valve (Figure 5). The other tube coming off that Flying Saucer is routed to the right side of the engine, to another diaphragm (Figure 6, but can also be seen in the upper right side of Figure 3-1).
Still, the vehicle lacked speed power, and it took us 29 hours nonstop driving to get from Denver, CO to Los Angeles, CA, where we were quoted at 17 hours. Insanity.
Figure 7 shows the Holley carb, which was purchased new about 9 months ago.
Figure 8 & 9 show a nut type deal on the Crank Case that can be spun freely and doesn't seem to be screwing anywhere, it is seeping, as you can see. Figure 10 shows the driver side engine seepage from near the spark plug. I've checked one plug and it is healthy looking.
Yesterday I attached a vacuum gauge to the port on the intake manifold that is plugged with a rubber cap (Figure 3-2 & 3-3) and it read 18" although the needle shakes a bit but not to the point where it is crossing other numbers on the gauge.
I went to the van this morning, and I noticed a small pool of what I believe is transmission fluid (Figure 11) that is dripping from the underside of the vehicle (Figures 12, 13, and 14).
This is all that I know and have tried my hardest to keep a close eye on everything, but I am not a mechanic and only know what I know from the Haynes Manual, the internet, and my good friend. I am really trying, and anything you could do to help us would be so amazing. Just give me a time and I'll be there 10 minutes before. We've put in a ton of work booking this tour and don't want to cancel any shows! It is slowly becoming apparent that we might not be able to play Denver on Thursday, but I have my fingers crossed.