1993 Oldsmobile Bravada runs rough after warm-up

My 93 Oldsmobile Bravada runs rough after it warms-up. Sprayed air intake throttle body with throttle body cleaner and corrected problem for a couple of hours then problem returned.

Dec 8. Removed air inlet temperature sensor and engine ran beautifully. Cleaned the temp sensor and it still runs very well, but maybe not quite as well. If problem returns will install new sensor — and check out the vacuum system per your suggestion. Thanks.

REPLY:
Sounds like the engine is running lean. Spraying the cleaner in it makes a richer fuel condition. I would guess you have a vacuum leak on your Oldsmobile. This problem shows up more on a warm engine. If the check engine light is on, have the codes scanned first. You can find a vacuum leak by spraying that cleaner around vacuum hoses and the intake manifold. STAY AWAY from the plug wires, ignition coil and DISTRIBUTOR CAP. That spray is VERY flammable. A common area is the passenger side front of the upper intake manifold GASKET.