Idle and running issues

Asked by Jun 14, 2017 at 01:23 PM about the 2005 Chevrolet Cobalt LS Sedan FWD

Question type: Maintenance & Repair

Okay I have an 05 Chevy Cobalt automatic 2.2 liter
engine when I go to start it up and move it from
Park to drive the car idles from 1 RPM to 1/2 RPM
all the way to 0 and shuts off temperature goes up
slightly in the 200s what could be my problem I've
replaced map sensor spark plugs spark wires
module ignition control sensor coil pack and it's
still coming up with a code that states barometric
pressure sensor I reset the computer and it runs
fine for a while when I go to stop at a stop light
stop sign the RPMs drop from 1 to 1/2 RPM
almost to zero and goes back up to 1 RPM when
it's running ok can someone please help me figure
out what's going on

2 Answers

95,585

If the check engine light is on have the codes read and post them here. FYI - The numbers on the tachometer are thousands.

8,205

check your coolant to see if it is full. check when cold for safety. temps are kinda high.. unless u ideled for 20+minutes. look at coolant. should be orange . also.. like the above have diagnostic codes read from your computer at aaa or pepboys or o'reily's . good luck.

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