Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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hey how are you
1- is there a check engine light on now ? did you scan it & retrieve fault codes
2- CKP Crank Shaft position Sensor & MAF mass Air Flow Sensor are 2 sensors will cause this & want throw a fault code
3- has it been tuned up
4- have you checked for vacuum leaks , spray starting fluid on intake manifold on a cold engine & see if it surges up
5- can you get fuel trims reading ,long term & short term at idle ?
Please let me know
ASE Certified Technician