stock o2z with lid, 60 grams per cylinder
05-28-2006, 02:02 AM
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stock o2z with lid, 60 grams per cylinder is that all with a lid and filter, or did maby got my tune off alittle.
have not done nothing to maf or the freq table...
have not done nothing to maf or the freq table...
05-28-2006, 09:59 AM
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That's very low for CylAir, by my experience. Either air
pumping is choked, or airflow measurement is hoaxed.
I saw 0.80ish for Dynamic Cylinder Air before headers,
have not remeasured it since install.
pumping is choked, or airflow measurement is hoaxed.
I saw 0.80ish for Dynamic Cylinder Air before headers,
have not remeasured it since install.
05-28-2006, 11:38 AM
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Hi,
As a reference, I see 68-70 gram / cyl on my hardware vise, totaly stock Tahoe 5.3.
Do you have a case of oil poisoned air mass meter?
Oil from the air filter does sometimes get on to the measuring surface ot the air mass meter. If so, the air mass readings become incorect. If servere enough i belive the PCM vill set a DTC, and light up MIL.
Another possibillity is that you might have melted your cats, that could realy plug your exhaust flow, and thereby also air flow. "What donīt get out, wonīt get in."
This is easy to check, measure the back pressure in the front O2 sensor nut/bung, what ever it is called in English. There is a procedure for this in the GM work shop manual.
Br//
BR//
As a reference, I see 68-70 gram / cyl on my hardware vise, totaly stock Tahoe 5.3.
Do you have a case of oil poisoned air mass meter?
Oil from the air filter does sometimes get on to the measuring surface ot the air mass meter. If so, the air mass readings become incorect. If servere enough i belive the PCM vill set a DTC, and light up MIL.
Another possibillity is that you might have melted your cats, that could realy plug your exhaust flow, and thereby also air flow. "What donīt get out, wonīt get in."
This is easy to check, measure the back pressure in the front O2 sensor nut/bung, what ever it is called in English. There is a procedure for this in the GM work shop manual.
Br//
BR//
