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Pontiac of the Month

FBIRD69's 1969 Firebird

2024 March
of the Month

dreadpirateroberts

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Forever Pontiac

  • Name
    hi
  • Gender
    Male
  • Year
    2005
  • Car
    GTO
  • Style
    Coupe

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  1. You could buy HPTuners. It is an expensive piece of software, but it lets you make a lot of changes to your ECM calibration. It works for many, many GM models. I have found it indispensable and use it on all of my GM vehicles. You don't need to have modifications to benefit from a few changes to your tune. Be forewarned, you should really look into how to tune your car before you start making changes. Lurk on the forums on hptuners.com for a while and learn as much as you can.
  2. You should buy a bluetooth OBDII dongle and install the torque app on your phone, if you have an android phone. It is a very cheap solution that allows to you read codes and log sensor data. Could help you diagnose your intermittent issue.
  3. Dexcool is like many other long-life coolants that are based on organic acid technology. The formulation is unique, but the additives can be found in many other coolants. The issue with Dexcool is that when a cooling system developed a leak, which introduced air into the system, fumes from the dexcool + oxygen + heat formed a very corrosive mixture that would attack any steel parts inside the cooling system. That is the source of the brown sludge many people complained about. Properly maintained, a system containing dexcool will work fine for a long time. The problem with modern GM cooling systems isn't dexcool, it is the use of plastic parts in the cooling systems. the plastic will become brittle and break over time. The intake manifold gaskets in many GM cars were basically o-rings that were supported by a plastic body. The plastic degraded over time and cracked, allowing the o-rings to squirm around and eventually let coolant seep past them. Many newer gasket designs use metal bodies to hold the o-rings instead. Or, the intake manifolds themselves are designed with grooves to hold the o-rings, such as in LS motors.
  4. Hi. 2005 Torrid Red GTO owner here. Head/Cam car, M6. Owner since 2006.
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