ac123 Posted February 4, 2023 Report Share Posted February 4, 2023 The wheel speed seems to read according to RPM. If I'm in neutral and at a stop it reads about 30mph. When I rev the engine up, it goes up to 40, 50+ mph. It seems to be sync'd to the engine rpm. If i turn on the pull-up resistor, then I get a reading of 0mph always. Quote Link to comment Share on other sites More sharing options...
koracing Posted February 6, 2023 Report Share Posted February 6, 2023 The speed signal from the MR2 dash to the link has never worked well in any MR2 with a mechanical speedometer I've ever tuned. G4+ or G4x they all seem to get crazy spikes. The electronic sender and dash configuration, however, in 93+ mr2s does seem to work a bit better. Other ecus I've used in the past didn't seem to have this much issue with that signal so I'm assuming it's a link thing. One way to get really good speed signal would be to use a separate GPS based speed sensor fed into the ecu or a dedicated speed signal off of one of the wheels using a dedicated sensor for that. Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 6, 2023 Report Share Posted February 6, 2023 The pull-up should be on. The DI connects to the reed switch in the speedo, the other side of the reed switch just connects to ground. If it always reads 0 with the pull-up on then you have a problem with the sensor or wiring. Quote Link to comment Share on other sites More sharing options...
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