Mazda Trucks

What may cause a 1986 Mazda pickup rebuilt carburetor to not run right and cause an uneven idle?

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Wiki User
2011-09-13 11:00:13

Well assuming the carburetor is set properly idle wise with a

meter and all the normal tune up things are in KNOWN good

condition.My suggestion is clean the egr valve under the carburetor

with carburetor cleaner and note the position of the gasket on it

for reinstall purposes.When cleaning it use some sand paper or a

small brush to remove the carbon buildup.It has one vacumm line,one

electrical connector going to it with 3 ten millimeter bolts that

hold it on.If the idle is still crappy I would suggest a new map

sensor which is mounted on the passenger side fender with a vacumm

line and electrical connector on it.And the tune items like

plugs,wires,cap,rotor button and even the oxygen sensor are

critical.Hope this gives you some insight into the issue.

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