2007 problems

[DWood]

i have a 2007 that i have had soo many problems with the throttle body has screwed up and ive had to replace it, and the alternator as well as battery. Now i was going down the hyway and it started popping in the intake (backfiring) and had almost no accelleration. i gimped it home and checked the codes it had a code for #2 misfire. anybody ran into a problem like this?

 

[tonymac617]

Backfiring? Check your fuel pressure regulator to see if its bad. Key on, remove the vacuum hose. if fuel is leaking out, its bad if not, onto more troubleshooting.

 

[DWood]

Maybe fixed

It didnt act like it was low fuel pressure i replaced the spark plugs and it has been doing fine. I wondered if it went from 8 cylinders to 4 and somehow got excess fuel in the cylinders due to the fact that it has 127,000 miles on it with same plugs. I also have a problem with the damn evap code. it says large evap leak. i have replaced the fuel cap with aftermarket. Still set code then went and got OEM it still sets the code. im thinking possible a bad purge valve.

 

[coopepor]

Backfiring? Check your fuel pressure regulator to see if its bad. Key on, remove the vacuum hose. if fuel is leaking out, its bad if not, onto more troubleshooting.

:waytogo: it really works!

 

[briando]

I swear, if you're pushin up to 50 or 60 thousand miles, you really need to check out the BG products that Rush is always talkin about. I got 3 mpg back. engine runs smoother, starts better. its crazy man. i caught it at this little two bay shop in a small town i pass thru for work. look it up, your Tahoe, or any car for that matter will really appreciate it.

 

[sinbadfxdl]

It didnt act like it was low fuel pressure i replaced the spark plugs and it has been doing fine. I wondered if it went from 8 cylinders to 4 and somehow got excess fuel in the cylinders due to the fact that it has 127,000 miles on it with same plugs. I also have a problem with the damn evap code. it says large evap leak. i have replaced the fuel cap with aftermarket. Still set code then went and got OEM it still sets the code. im thinking possible a bad purge valve.

I'd replace the plugs every 3 yrs or 50k miles. Keeps the spark fresh and ensures no fouled plugs.
:happy160: