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Timing Specifications for a 1999 Chevrolet Malibu

Chevrolet introduced the Malibu as the top-of-the-line trim of the Chevelle in 1964, and in 1978 Chevy dropped the Chevelle and replaced the entire line with the Malibu. The 1999 Malibu came in base and LS trims with three different engines. As is often the case, the timing specs, such as the spark-plug gap and firing order, vary not only from year to year but also from trim to trim of the Malibu. So, it is extremely important to make certain that the specs are specific to the make, model, model year, trim and engine size. However, certain aspects of the 1999 Malibus timing are not adjustable at all because they are controlled by the vehicles computer system.

The 2.4-liter, 150-horsepower Engine

The base trim of the 1999 Malibu came standard with a 2.4-liter, 150-horsepower in-line four-cylinder engine. The spark-plug gap for this engine was 0.50 inches. The firing order was 1-3-4-2. The ignition timing was not adjustable, regardless of the transmission, because the timing was dictated by the Power Control Module (PCM).

3.1-liter, 150-horsepower V-6 Engine

A 3.1-liter, 150-horsepower V-6 engine was standard in the LS trim and optional for the Base trim. The spark-plug gap was 0.60 inches, and the firing order was 1-2-3-4-5-6. The ignition timing and the mark were controlled by the PCM and a crankshaft position sensor. The only way to actually adjust the timing would be to replace these parts.

3.1-liter, 170-horsepower V6 Engine

The 3.1-liter, 170-horsepower V-6 engine was optional in both the base and LS trims of the 1999 Chevy Malibu. The spark-plug gap was 0.60 inches and the firing order was 1-2-3-4-5-6. Like the other two 1999 Malibu engines, the ignition timing was not adjustable because it was controlled by the PCM and a crankshaft position sensor.