Changing spark plugs in 2002 tribute

sounds like an improper install or something damaged during the work done oil on plugs --head gasket fail- head damage- piston ----have to do a full diagnostic on motor and ask family member exactly what he did

You have a very bad vacuum leak. Start checking for cracked , broken hoses. GOOD LUCK FRIEND.

On a Mazda Tribute you must remove the plastic engine cover. Once that is removed you should see the spark plugs. They will be on the top of the engine with caps on them. you must undo the cap and remove it on each spark plug to have access to the spark plug.

I believe the Mazda V6 is the same as my 2002 Escape and uses individual coil-over-plugs or COPs. Each spark plug has it's own coil.
I've had an engine light twice, and needed to replace coils. I finally replaced them all. They are available at Ford, car parts stores like AutoZone, or I bought my full set of 6 coils on Ebay.
Autozone coils, for example are about $70/coil.
One of the difficulties with replaceing the coils, is that the 3 coils on the "back" of the engine are covered by the intake manifold. The manifold needs to be removed to get to them. You'll need the manifold gasket set, which costs less than $15.
The coils themselves are easy to replace. Unplug the 2 wire connector, unscrew one bolt (using 8mm socket?), and pull the coil up and off the plug.
I recommend replacing all the coils, and also replace the plugs while you're in there. Use OEM plugs; probably Motorcraft. (If the original plugs lasted 100,000+ miles, why would you experiment with something else?)
Here's a picture of one coil:

I have a 2000 Passat V6. They told me that same thing. To replace the gaskets is easy. You just remove the covers and the air filter box and unscrew the 6 bolts holding the valve cover on it and there you go. You want to clean around the gasket service and add a little bit of sealant to the edges. Replace the old gaskets and put everything back together, be careful not to overtighten the bolts, can flatten out the gasket and cause oil leak again. On the right side of the engine, you have to remove the coolant box to get to it. Same procedure....

buy flexible connector for socket and extentions if needed

See the tips section of my profile on Fixya. I have complete instructions on how to change the plugs and coils.

I have a 2002 Escape V6 w/ 100,000 miles and I just changed the plugs. If you have a V6, you will have to remove the Upper Intake manifold. It's not too bad. You'll new a gasket set from Autozone or NAPA for about $10

See the tips section of my profile. I have complete instructions for the V6.

can 't you remove the coils insted of the intake ? It is much easier.