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TPS problems…but solution!

The car starts SMS revs perfectly but a nagging problem is I would not see any indications on the software of a TPS signal below WOT. The problem produced odd behavior but I believed it was just how the Hondata ecu worked.

After driving and not seeing the tuning results in the data log I decided to pull the tps and flip it 180 degrees. I’m doing so I noticed the connection point was incorrect and the sensor was not making contact with the throttle shaft until 25% of the sweep happened. A small correction and things were showing TPS motion the entire way through the range. Timing is more responsive and drivability is better.

One problem remains. Under WOT I am not seeing boost over 1 psi. The watergate has a 7 psi spring in it and so something isn’t kosher. The hunt continues…

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Cooling problems…

It took a while to resolve but finally everything is 99% done. The coolant problem was most likely caused by a bad (and brand new) thermostat. After adding aircraft piping with stainless heat jacket (see picture) we had some success but a small leak caused by npt and straight thread being incomparable. Eventually I changed to -16an and things are working fine.

The radiator was replaced and -16 fittings welded on. There was a need for a shaped flexible coupler and so the piece below solved the problem.

At this point things are lined up and ready to head to the tuner. Hopefully we get there one day soon. The car has 25 “neighborhood” miles on it and feels good. Still only 4 forward gears but fine for now.