I am assuming that you are asking about a Celebrity 2.5L engine with distributor-less ignition. If so, there are two coils mounted to the ignition module, each provides spark to two cylinders. They are located on the side of the engine block underneath the intake manifold. You did not ask, but the crankshaft position sensor is underneath the ignition module.
Engine control module (computer) should set a trouble code indicating a faulty coil pack. "missing/skipping engine - especialy at 3000 RPM's or - more is a possible indicator of a faulty coil.
Symptoms of a bad coil pack can vary. Most common is a Misfire which will turn on the check engine light. the most common way to test a coil pack is with a volt meter set to OHMS
To check the resistance on a coil pack for a 2003 Trailblazer, first, disconnect the electrical connector from the coil pack and remove it from the engine. Use a digital multimeter set to the ohms (Ω) setting, and measure the resistance across the primary terminals (usually the two larger pins). The typical resistance should be between 0.5 to 2.0 ohms. If the reading is outside this range, the coil pack may be faulty and should be replaced.
To measure the resistance of a coil pack, set your multimeter to the ohms (Ω) setting. For most coil packs, a range of 200Ω to 2kΩ is appropriate, depending on the specifications of the coil. Connect the multimeter probes to the terminals of the coil pack, ensuring a good contact, and note the reading. If the resistance is outside the manufacturer's specified range, the coil pack may be faulty and should be replaced.
The spark plug firing order is ( 1 - 4 - 2 - 5 - 3 - 6 ) The engine cylinders / spark plugs are numbered 1, 2 , 3 from front to rear on the passenger side of the engine and 4 , 5 , 6 from front to rear on the drivers side of the engine The COIL PACK TOWERS are numbered : coil-----3----4 pack----2----6 plug-----1----5
The timing on y our 1987 Chevy Celebrity is controlled by the engine computer, there is no way provided to adjust it.
The idle speed on a 1987 Chevy Celebrity is controlled by the engine computer, there is no way provided to adjust it.
Are you asking about the time on the radio or the spark timing on the engine?
The 1987 Chevy Celebrity has distributor less ignition. The timing is controlled by the engine control module and there is no provision for adjustment.
Easy! 1-2-3-4-5-6 left to right. I don't remember offhand how the cylinders are numbered on the engine but if you already know you're all set.
The 1988 Chevy Celebrity uses distributorless ignition. There is no provision to alter timing, the engine control module takes care of that.
To test an ignition coil on a Kohler engine, first, ensure the engine is off and disconnected from any power source. Use a multimeter set to the ohms setting to measure the primary and secondary resistance of the coil; refer to the engine's service manual for the specific resistance values. If the readings are outside the specified range, the coil is likely faulty. Additionally, you can perform a spark test by connecting the coil to the spark plug and grounding it to check for a strong spark when the engine is cranked.