what can cause engine rpm to jump up and down in traffick

[Amit3]

i got a mazda 323f

[Strugglerzinc]

Idle Control Unit buh den again i ent kno shyt bout mazda engines..

[W2J]

ISC or vac leak

[Greypatch]

also bad air flow sensor ..sheit coild be loose as well

[phreakazoid]

Clean the MAF sensor and hopefully this should solve ur problem .

[bleedingfreak]

A/C?

[TriniGT]

Also clean your air filter.

[Aaron 2NR]

if u put in ah cone filter it wud be cuz too much hot air is bein thrown onto the filter. form the fans..
also if cud be the spark plug wires an as patch say air flow sensor..

try gettin a diag. done on the car

[ZORT]

ISC or vac leak

correct depending on how drastic. sorta like surging.

[Sanctifier]

Bad Throttle Position Sensor is usually first choice.

[Yeo]

VTECK?

[Greypatch]

chek yuh mechanic

[WAZZUP]

Also, you may want to check your temperature gauge. If you car over heating a bit, you may tend to get a rise and fall of rpm. Something to check.Won't hurt !

[Ignorant Ignis]

VTECK?

LOL.....AHHAAHAHHAHA