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06-10-2007, 11:19 PM | #1 | |
AF Newbie
Join Date: Jun 2007
Location: st joe, Tennessee
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rough ideling on 82 datsun 720
i have a 1982 datsun/nissan pickup with a 2.2 liter engine and i cant get it to idle down below 1200 rpm and still run smooth. i took the carb apart and cleaned it but it wasnt stopped up so that didnt help. it acts like the carb is stopped up because i can choke nearly all the way and it runs smooth but still wont idle down. does anyone know what i can do to it to fix it.
im thinking the problem is more than likely a vacuum leak or a blown gasket does anyone have any ideas whats wrong thanks |
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06-11-2007, 11:50 PM | #2 | |
AF Regular
Join Date: Sep 2005
Location: Napa, California
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Re: rough ideling on 82 datsun 720
could be a bad intake gasket (manifold or carb) check in the normal way, with carbcleaner, brakeen, etc.
but it could also be a bad wax cylinder. some of those motors' (z22) carbs had a wax cylinder that would hold the throttle slightly open to warm up the engine on a cold start. the wax would then warm up and pull off the fast idle. look for a round cylinder on the side of the carb with a little rod sticking out of it (that may or may not be leaking blue stuff). it was not uncommon for these to fail and hold open the throttle a little and cause an un-tune-outable(?) fast idle. this might be your problem, the kit to fix it is available through nissan. |
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