280Z engine backfires randomly and painfully

Asked by delZfan Aug 29, 2015 at 02:53 PM about the Datsun 280Z

Question type: Maintenance & Repair

Reading a lot about Z cars running fine then stalling like out of gas.  I have
a 77 280Z engine with SU carbs.  Car runs great first 15 mins, then
sputters and backfires out tailpipe.  Rev engine and it chokes, sputters,
backfires (sometimes out intake - can see with air filter off) then catches
and runs great, then does same stuff again.  Any ideas of whether carbs or
electric is problem?

64,490

firebird338 answered 8 years ago

Sounds like the carbs are dirty spray with carburetor cleaner and use the whole can and replace fuel filter if have not done so in a while add carb cleaner to gas tank.

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delZfan answered 8 years ago

Thanks Firebird. Tried that and no luck. Looks like I'll be rebuilding the carbs. But would appreciate other ideas before I start chasing this ....

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