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Ben and I went back to work on the Yellow Peril. Now early last week it was running fine. Then it got to not idling and then it was too rich,
spark plugs dripping gasoline and no start no matter what. Spark and timing
fine. Today we pulled the computer, unplugged it and traced the wires to the
coolant temp sensor and the thermal timer. Coolant temp sensor connectors at
the computer had about 2500 ohms between them, which is what it should be.
No continuity with the thermal timer. Got clicks when opening the throttle
like it is supposed to do. Put it back together and tried to start-
wouldn't fire. Pulled a plug and it was bone dry so I sprayed some starting
fluid into the manifold and it hit a few licks and quit. Hooked up the fuel
pressure gauge and it was holding 30 psi. Tried adjusting the manifold pressure
sensor richer by steps checking the plugs each time to make sure we had not
flooded it. We could get it to fire a few times but never start. We got the
screw out as far as it would go in the manifold pressure sensor and it was still
doing the same. I cleaned up the dirty, slightly corroded computer and it
didn't look like anything was broken or corroded through so I put it in.
No change. I tried the other nonleaking manifold pressure sensor. Still no
change. So with either MAP sensor or either computer and any adjustment on the
MAP sensor, it is still apparently too lean. I tried disconnecting the leads
to the coolant temp sensor, which should make its resistance infinite and it
should thus make the mixture full rich. Still have cold, dry spark plugs.
I do have a different computer on the way but am still looking for a good
Manifold Air Pressure sensor for a D-jet system for a reasonable price.
Can any of you give me any suggestions? Wonder if the Lord is using this as
a "thorn in the flesh" like He did the apostle Paul.........
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