The water delivery system at FMX la Frontera Motocross Park consists of 2 large plastic tanks, fed by city water, a pump to move water from the holding tanks, and a water truck to wet the track. The water truck, the last element in the series, has worked only intermittently since the park opened in January, giving that impression to casual observers that the track’s need for watering was not being taken seriously. Insiders have been aware of the various issues, and several people have worked together to get the truck to a state of semi-reliability. The truck also seems to have a preference for drivers, and will start and continue to run for Sam and Tony, but not for anyone else.
Early on, the truck started only intermittently, and then only for Sam. The truck would start once, and then stop almost immediately. Then, it would need 10-15 minutes of rest before it would start again. Under-the-hood triage revealed that the truck would run if the air filter were removed, but not otherwise. Further exploration discovered a problem with the choke system: If the choke were operated manually from inside the engine, sufficient gas would be delivered to allow the truck to start. Careful manipulation was also needed to ensure that the engine received enough gas to allow it to warm up.
Engineer Brian Hill grew up with engines similar to the one this 1982 Chevy, and he was able to make some adjustments that allowed the truck to run fairly reliably until very late Thursday night, when it died in the northeast corner of the track. It failed to respond to attempts to jump start it, and it was later towed out with the track’s F350. It did not start again until early Sunday, when Brian replaced the failed fan belt, reseated the negative battery pole that was failing to make contact, and made serious attempts to connect the alternator securely. Unfortunately, a frozen bolt refused to budge, and the repair on the alternator remains to be completed.