The OEM cylinder occasionally stops engaging requiring a tap on the key to turn. I've gone through 3 aftermarket assemblies with the same result. The van will start and immediately stops. It sounds like the fuel pump is not coming on. Last night I tried a assembly from AutoZone. After it started and then stalled acting like a fuel issue. The OEM cylinder is really acting up now after spending half an hour to get it to engage. I haven't tried listening for the pump yet.