I have just done an oil and filter change, as well as air filter, on my 2003 Mazda Tribute V6. It ran well after the service, but then I changed the fuel filter and it began to lose revs at idle. What do you think the problem could be?
Check the fuel pressure to make sure it hasn’t dropped since you changed the filter. Perhaps put the old filter back on and observe what happens to the idle speed, fit another filter if the speed returns to normal.
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