i changed the spark plugs in my mazda tribute last month and put everything back together. When I did this I changed the gaskets because I had to take the top half of the engine off. It ran for 20 min. then it went into first gear and won't go faster than mph. So I parked it at home. Recently I changed all the ignition coils on the mazda and changed the battery. I have been told that the car is in time still and I am getting spark. Tried to spray starter fluid in air intake just backfires. I don't know what else to look at.