Hi, folks. i have a 1978 124 and for some reason the engine has decided to
race. at initial start up the RPM's are low, but as you drive, at idle at a
light, it's up to 2500 and i can't figure out why. can anyone at least point me
in the right direction, or tell me something to look at i might have missed.
i've checked the linkage on the carb and all that seems fine. thanks
This model has the dual-point ignition. Be sure that they are BOTH set
correctly and that the sensor to switch them after warm-up is hooked up and
functioning correctly. I seem to recall that Mirafiori.com has a good FAQ
on this system, or check the Haynes manual for the procedure. It's also
worth checking to make sure a prior owner hasn't "fixed" a clogged idle jet
by cranking down on the throttle stop. My stock '78 idles great hot or
cold, so it's shouldn't be a design issue, although there is an awful lot of
emissions plumbing on that car, so there could be a cracked or misconnected
hose or stuck valve somewhere.
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