Anyone had this happen with their tvs 1900?
08-19-2009, 06:56 PM
#12
08-19-2009, 11:43 PM
#14
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I certainly agree that elev and heat are part of the mix. When it cooled to high 60's the other evening is when it finally got past the 6lb mark. The surging is one that is certainly weird, and today the truck set a code for being lean after very light to moderate throttle around town. Got me perplexed?
08-19-2009, 11:53 PM
#15
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elevation. my trd tacoma made 6 psi and 8 psi in texas. I bet mos of your problems are from the elevation.
You sea level guys have it waaay to easy!
You sea level guys have it waaay to easy!
08-20-2009, 12:07 AM
#16
does anyone have a calculator for boost and displacment??
for example now on my 6.2 with a 2.8 pulley im running a max of 6.5psi..it does reach 7psi once in a blue moon... ppl kept saying it was due to the displacement?
for example now on my 6.2 with a 2.8 pulley im running a max of 6.5psi..it does reach 7psi once in a blue moon... ppl kept saying it was due to the displacement?
08-20-2009, 08:50 AM
#17
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too many factors will affect boost to make a calculator, displacement, heads, exhaust, cam, compression... and on and on. It's a measurement of restriction not power.
08-20-2009, 09:21 AM
#18
FIRST...check the torque on all the bolts cause it sounds lots like a boost leak even with the elevation. Use a smoke pencil to be certain there's no leak. I have no experience with the TVS, but if the gasket set up is the same as the MP's then there's always a risk of it having folded or gapped somewhere. A while back my MP112 had similar issues (boost dropped off hard and it sounded different) and it was the gasket leaking. Altitude may play a part, but guys we're not talking about 30,000 feet! Did u check the MAP sensor too...I assume ur not running a SD tune?
08-20-2009, 09:58 AM
#19
If you're using a scan gauge to measure your boost I'm not surprised. The scan gauge is reading your MAP and giving you absolute pressure (manifold pressure compared to a vacuum), whereas a normal boost gauge will give you gauge pressure (manifold pressure compared to ambient air pressure). I bet if you hooked up a normal boost gauge you would still see your 6+ psi even though the scan gauge shows 3psi. Sounds normal to me. A 5800 ft elevation increase change will kill your power, not to mention that your tune is probably way off as well.
08-20-2009, 10:27 AM
#20
If you're using a scan gauge to measure your boost I'm not surprised. The scan gauge is reading your MAP and giving you absolute pressure (manifold pressure compared to a vacuum), whereas a normal boost gauge will give you gauge pressure (manifold pressure compared to ambient air pressure). I bet if you hooked up a normal boost gauge you would still see your 6+ psi even though the scan gauge shows 3psi. Sounds normal to me. A 5800 ft elevation increase change will kill your power, not to mention that your tune is probably way off as well.