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Chasing a misfire 200

posted by  machine man on  Fri Oct 31 21:20 CST 2014
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last visit: Wed Oct 22 15:40 CST 2014
[RELATED]

Is this B21F with a "T" mean it's a turbo?

By any chance is this also a CIS injection system with Lambda?

If so, it might have a Frequency Valve under the brake booster. Is it buzzing all the time like it has too!

There is a relay that controls the O2 sensor and the operations of FV.

It's a square cube relay on the front left fender by the headlight dipper relay.

Swede Freak spoke of mixtures and I saw a "control" pressure you noted.
That's what prompted so many question on my part! I agree with his scenario.
You might listen for a smooth even buzz of that valve as it might have a problem not related to a relay?


My relay failed from corrosion and old age, take your pick.
Mostly hard start problems at random though. Ran rough from a bad mixture.

Phil






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