High idle, hesitates when coasting, sensor reader isn't reading anything, check engine light stays on.

Nancy Tulsa

Asked by Sep 11, 2016 at 05:05 PM about the 1995 Chevrolet Suburban C1500

Question type: Maintenance & Repair

Recently changed the plugs, wires, oil and fuel filter
on a 95 chevy suburban. Runs rough, has high idle
doesn't idle down, when coasting it feels as if
someone is tapping on the brake cause the truck
slows down, check engine light stays on. Went to
Oreillys to get a sensor check and the sensor
reader wasn't registering any codes. When
accelerate there is exhaust fumes and first couple
days after changing everything black smoke was
coming from tail pipes.

1 Answer


Its running rich, (black smoke) throttle body may need a overhaul.

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