missfire at low rpm

[so-jdm-cb]

im having an issuse with a missfire at aroud 1500rpm but past that it clears up,and runs fine.i was thinking it would be an injector ,i was just looking for a second thought,thanks for you help

[TheNextAZN]

one u can check ur injectors by leaving ur car on.. and with a long screwdriver.. place it on the injector itself and listen on the butt of the screwdriver handle for ticking.. the consistent ticking is the injectors working... u might be able to turn ur idle screw so that ur car idles at 1500rpms.. but that's a long shot. might need a person to step on the gas

I would check ur distributor cap.. take it off clean it or replace it..if ur replace the cap. might as well replace the rotor too.

[so-jdm-cb]

one u can check ur injectors by leaving ur car on.. and with a long screwdriver.. place it on the injector itself and listen on the butt of the screwdriver handle for ticking.. the consistent ticking is the injectors working... u might be able to turn ur idle screw so that ur car idles at 1500rpms.. but that's a long shot. might need a person to step on the gas

I would check ur distributor cap.. take it off clean it or replace it..if ur replace the cap. might as well replace the rotor too.

i replaced the cap,rotor,spark plugs,and wires, but it seems to do it when there is a load on the motor,such as starting in first gear. and taking the rpm up.right at 1500 it misses then after that it clears,thanks for your help

[deevergote]

Is your CEL on? Does the car bog down at a certain point, misfire, and then accelerate normally? It COULD be an o2 sensor issue (even without a CEL... if it's on, it would be code 41 or 43 for an o2 sensor problem.)

Does the problem occur at all times, just when the car is warm, or just when it's cold?

An injector issue is possible, but I don't imagine it would be limited to a specific RPM.

[bowtie_ethan]

Its either a burnt/damaged valve or weak valve spring while its idlesing by itself does it miss or idle rough if so unplug one spark plug wire at a time for a second if you un plug one and it immediately dies you have your weak cylinder

[deevergote]

A safer and more reliable test would be to conduct a compression test...

[southsidecb7z]

May sound stupid, but I had a loose spark plug once that caused the same shit.

[deevergote]

I had a loose spark plug (due to damaged threads in the head from overtightening) cause a knocking sound. I thought my engine was done...

[so-jdm-cb]

Is your CEL on? Does the car bog down at a certain point, misfire, and then accelerate normally? It COULD be an o2 sensor issue (even without a CEL... if it's on, it would be code 41 or 43 for an o2 sensor problem.)

Does the problem occur at all times, just when the car is warm, or just when it's cold?

An injector issue is possible, but I don't imagine it would be limited to a specific RPM.

no cel.yes at all times,im thinking it could be my o2,because im getting really bad mpg

[deevergote]

If you don't know the age of the o2 sensor, or if you know it's original, I'd change it out for a brand new Denso or NTK/NGK unit. Even if it's not the cause of this problem, it's a wear item that will soon need to be changed anyway.

[so-jdm-cb]

If you don't know the age of the o2 sensor, or if you know it's original, I'd change it out for a brand new Denso or NTK/NGK unit. Even if it's not the cause of this problem, it's a wear item that will soon need to be changed anyway.

ok thank you