1991 Volvo 240 Backfire

1991 VOLVO 240
180,000 MILES
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PMGREEN
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When the engine is warm, the car will backfire when starting. Nothing more. I used a fuel injector cleaner, Chevron Techron to no avail. What is the cause and how may I fix this? Backfire is through the exhaust.
Aug 24, 2013 at 11:01 AM
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ASEMASTER6371
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you have a timing issue. if the timing is off, it will backfire out the intake or exhaust. how old is the timing belt.

Roy
Aug 25, 2013 at 7:44 AM
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PMGREEN
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Timing belt was replaced less than 10,000 ago.

Aug 25, 2013 at 9:28 AM
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ASEMASTER6371
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I would still check it for being in time.

start with a compression test.

Roy
Aug 25, 2013 at 9:38 AM