I changed the timing belt on a 97 Avalon. When I start it, it backfires.

lilrickys

When I get to 2500 rpms it bogs out. I get code 300 on obd. the car sat for a year and a half before I did the timing belt.

Mr_Shiftright

Did you change a broken belt or just a worn out one?

lilrickys

it was a worn out belt

Mr_Shiftright

Well that backfire isn't a good sign. You may have to double-checked how you set the marks on the pulleys for the timing belt. If a valve is timed wrong in the combustion cycle, you'll get that very symptom. I know it's a pain to do that, but at least you will have eliminated the obvious.

isellhondas

Sounds like it's off a tooth which is an easy mistake to make.

lilrickys

I cleared the code of 300 and ran the car for about 20 min at around 1500rpms than checked for any codes and got no codes.but when it gets to 2500rpms it still boags out.checked for codes a few times and got nothing.