Tundra Problems

My dad has a 2002 Tundra. It was running a little rough so he changed the fuel filter and today he changed the plugs. Now it will only run for a second or two and revs up more than it should in that second or two. He removed and installed NGK plugs but he said they are different part numbers. Thats what the parts guy gave him. I live 5 hours from him and just trying to help out. Any advice?

 

Hey Bryan, I moved your thread to the 1st gen section. We’ve got an awesome group of owners there who should be able to help ya out!!

Welcome!

 

Thanks!

 

Part numbers of the plugs he installed would be helpful to confirm if they’re correct, and is it a 4.7L V8 or a 3.4L V6?

The higher revs are making me think vacuum leak, or a leak in the air cleaner piping between the MAF sensor and throttle body.

 

Its a 4.7L. The funny thing is he put the old plugs back in and now it is running as smooth as can be even though the old plugs are in pretty rough shape. Your assumption is more spot on lol i was thinking the MAS may need to be cleaned. Now the problem is the truck has a hard time when going up hill or a heavy load is put on the engine.

 

That can be typical of plugs, so the old tired plugs may well be the issue.

Since part numbers of the new plugs didn’t match, we have two possibilities. First is that the parts guy screwed up and they were plain wrong (maybe for a V6??)and caused even more issues, which is sounding likely.

The second possibility is that the new plugs are one of the suitable choices from NGK, just a different spec.

You can check that here:

https://partcat.com/ngk

Cleaning the MAF sensor is easy and a great idea too. Is the check engine light coming on at all?

 

They are taking the plugs back to make sure they are the correct ones. He told me there were codes but they went away after changing the plugs and they haven't come back again. I am going to check again tomorrow and i will suggest cleaning the MAF.