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Old 07-19-2009, 11:50 PM   #1
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Default Custom Tune.

From hearing the stories about ZZP PCM'* running lean and blowing engines up, I am really looking into getting a custom tune. I have never and nor do i know how to check if im running lean.

Does anyone know a shop in michigan that can give me a good custom tune?
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Old 07-20-2009, 12:45 AM   #2
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A good way to check if your running lean or rich is be hooking up a 5 gas analyzer to the tailpipe. you can see if your running rich, lean, have a misfire condition, combustion chamber temp, along with other stuff. a five gas is a great diagnostic tool.
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Old 07-20-2009, 06:09 AM   #3
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Quote:
Originally Posted by chevyboy572 View Post
A good way to check if your running lean or rich is be hooking up a 5 gas analyzer to the tailpipe. you can see if your running rich, lean, have a misfire condition, combustion chamber temp, along with other stuff. a five gas is a great diagnostic tool.
5 gas analyzer are expensive, if i am right they run around $3k
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Old 07-20-2009, 11:15 AM   #4
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You could also pull the plugs and read them.
Use a fuel pressure gauge to see if pressure is correct
Or monitor the O2 sensor in the car.
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Old 07-20-2009, 11:44 AM   #5
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You can use a, wide band O2, a bit pricey at perhaps $200 or so. Or know someone with scanning software where you can read narrowband O2 and get a average.
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Old 07-20-2009, 01:23 PM   #6
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How do you fix running lean, and does it stop it for good?
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Old 07-20-2009, 01:31 PM   #7
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You would need to tune for that. It'* a on going process. The seasons, temp, etc all effect the tune. I have like 3 different tunes right now and change them with the seasons.
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