Troubleshooting car problems of engine backfires
When the car won’t start possible reason is the following
If the problem only occurs during or after raining, then the possible problem is moisture on the distributor cap. Moisture results from the humidity in the air, if the distributor cap contains moisture, this will interfere on the ability of the ignition system to operate properly and will result to engine backfires.
When the problem occurs at any conditions, the possible cause is a timing problem. To confirm that this is the cause, open the hood of the car then inspect the timing belt. If the timing belt is broke or damage, then this causes the problem. When the belt is damage it can make the engine timing off, which can be resulted to engine to backfire.
Possible Cause of Engine Backfires on Starting
Moisture on distributor cap, problem with timing belt
If the problem is about the moisture on the distributor cap, no other option but to keep your car park on a dry place (shaded area) when a rain is anticipated. As for the timing belt problem, have your car towed to a reputable auto repair shop and ask the mechanic to replace the timing belt, but before you do shop around for a shop that can offer the best price because this kind of job can also entails high cost. However, to reduce repair cost you can try replacing the timing belt yourself, just refer to the service manual that covers your car model.