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I´m stumped. Ignition timing is spot on. Mixture is OK. Can´t find any major air-leaks. (By spraying brake cleaner) But I don´t get a change in RPM by removing oil-cap, so i´m guessing there is something I´m missing.
TTV seems ok. Al tough I´m not a 100% certain how to test it. I´m finding conflicting advice. Disconnecting vacuum hoses from it has no apparent effect. Is it supposed to be open or shut, when car is cold?
Could it simply be the spark plugs I got in her? Runs really well on higher revs, may be a bit sluggish on lower revs. Tiny bit of random bucking. Goes poof-poof on steady-ish revs up to 2500rpm.
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1977 911s
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