Having problems with your 1995 Oldsmobile Cutlass Supreme ?

O2 Senser maybe...When I first start it up idles high then low

\015 When I go to start my car in the morning if only notice since it has got cold (normally over night or most the day) it idles up for a minute then it will idle down like it is going to die then it will idle up for a second. It does this till is warmed up.\015\012 \015\012Is this an easy fix or should i take it in to get fixed.\015\012I know how to change brakes, spark plugs, wires.\015\012Small stuff.\015 Posted / edited by AnonymousUser on : 26-10-2020

Answers :

The O2 sensor input is ignored by the system computer (ECM) until the engine is hot, around 160 deg F, what u might have may be fixed by the following procedure, one other note your 1st tune is due at 100,000 miles, have you reached that? if so replace plugs and check plug wires for damage. \015\012Here are the most common causes of surges, stalls at stops, low erratic idle speed, rough idle and engine hesitation, it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Repair Help & Product Troubleshooting for 1995 Oldsmobile Cutlass Supreme

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