Car has small stutter

[ASpencer531]

Car idles nice in park the gets this small rpm drop from nowhere


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[320iAman]

More Info:

Is this during cold startups ?
Is this after warmup ?
Manual or Automatic Transmission ?

Randy

[ASpencer531]

More Info:

Is this during cold startups ?
Is this after warmup ?
Manual or Automatic Transmission ?

Randy

After warmup stutter slightly less and automatic transmission


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[320iAman]

Cold start- cold engine idle will go up to 1300-1500 rpms, then as the warm up circuit starts to shut down the idle will drop back to 1000 rpms- curb idle speed normal.

Randy

- - - Updated - - -

Normal idle for 5 speed is 850 +/- 50 rpms
for automatic 950 +/- 50 rpms

Randy

[320iAman]

Is that the stutter your talking about or does the idle drop and come back up ? If it drops how much ? Does the engine seem to be seeking an rpm like going from 900 to 1000 rpms at warmed up idle ?

How long has the O2 sensor been in ?

Randy