Strange Tach behavior on TFI install

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Tommy
Helpful MS/Extra'er
Posts: 45
Joined: Sun May 02, 2004 8:01 am
Location: Trondheim, Norway

Strange Tach behavior on TFI install

Post by Tommy »

Just installed a MSI v3.0 running Extra 029q2 on a friends Sierra 2.0IS. Using 330k resistor mod to LED17, and 5101FG from EEC-IV to drive PWM Idle valve.

Painless install apart from a few troubles steming from the general condition off the engine/wiering.

But there is one strange problem.

When turning on the ignition, the distributor (hall sensor?) emits an humming sound, after 10-20seconds the sound stops and the tachometer rices to 7000RPM. During this you can start the engine at any time without problems. But after the tach rises, I can not send to the MS, after the car starts coms is good again.

Anybody have an idea what is going on.


Tommy
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