1994 Chevrolet Lumina "rpm changing erratically" Questions

...3.1 v-6 has a missfire under load and while looking at the data stream through my scan tool the rpm signal is erratic while the actual engine speed doesnt change. the data will show up to 4300

...and sometimes zero accompanied with minor power flucuations. Hi .... On your HOnda accord V6. The rpm is generated from the Distributor. The more possible problem for erratic RPM is the cam sensor ...

...lightly tap on mass airflow sensor with screwdriver handle and listen for erratic change in engine rpm. Wiggle airflow sensor connector and listen for any changes also. Replace sensor if rpm

2000 Valkyrie. Running poor. Erratic idle, backfires. When RPM's are up, it runs good. I must give it throttle to keep it running. I drained fuel, replaced with 93 octane,changed the air filter. Stuck

...and your injector. The rpm goes up and drown erratically, check your distributor connections and the ground wires. If distrubutor has bad ground or conection can cause erratic behavior RPM

engine runs in idle +/- 2500 rpm good day, my peugeot 206 1999 runs on first start of the day erratic and stops, when start again it runs ok, when engine is warm it starts ok but runs at high idle +/-

when my car is in park my rpm hand keep going up and down Well, how many RPMs does it vary,and is it a steady drop and raise or erratic? On a Taurus,there are 4 or 5 heater positions that engage the ...

...idle solenoid but still have occasional erratic idle. Sometimes idle is extremel fast (1500-2000 rpm). Does this regardless of engine temperature. Occasionaly will die when rpm is jumping up and ...

...changing/erratic,engine then races to high rpm,only at that time(high rpm)does timing mark maintain correct 10 deg consistently,then returns to rough poor idle- engine cycles like this and wont ...

How do you change a fuel pressure regulator? My car is jerking, stalling and has erratic RPM, could it be the fuel pressure regulator, or something else? could be anything,hook a scanner up to it to ...