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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15181
Experience:  GM Grand Master Technician 2007. 14 years experience.
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1997 Tahoe CEL blinks after short idle, coasting, goes off

Customer Question

1997 Tahoe
CEL blinks after short idle, coasting, goes off driving with slight load, acceleration.
Rough idle, rough driving at 1500 rpm until warm
Replaced plugs, wires, rear O2 sensors, sea foamed, same symptoms.
I suspect vacuum issues.
Heard of this before?
Submitted: 1 year ago.
Category: Chevy
Expert:  JOHN aka Eauto replied 1 year ago.

any codes other then misfire codes?

Customer: replied 1 year ago.
Scanned for codes-P0141 (02 sensor heater circuit B1, S2, replaced)
-P0161(02 sensor heater circuit, B2, S2, replaced)
Not addressed yet,
-P0175
-P0172
-P0300, random cylinder misfire- compression test ok 160 to 171
- replaced plugs, fouled black
Expert:  JOHN aka Eauto replied 1 year ago.

any vacuum or intake leaks?

Customer: replied 1 year ago.
Probably.
Expert:  JOHN aka Eauto replied 1 year ago.

can you check?