question for the hp-tuner pros...
02-20-2006, 05:43 PM
#1
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question for the hp-tuner pros... im beginning to believe these symptoms are all related to 1 problem
1: tcs light turns on and off (for no apperent reason)
2: code 106 "insufficent vaccume" or "blocked hose" or "vaccume leak"
3:only when tcs is not working (i think) the tranny wont downshift and begins to heat up
my guess, and its purely a guess; is the cam is causing the computer to think there is a vacume leak which is causing the tcs to turn off and tranny to go into limpmode.. but like i said this is a huge unedcuated guess thats probally not right but i figure id throw it out there ....
i dunno what do you think?
BTW this is after a MS3 can and prc head swap
1: tcs light turns on and off (for no apperent reason)
2: code 106 "insufficent vaccume" or "blocked hose" or "vaccume leak"
3:only when tcs is not working (i think) the tranny wont downshift and begins to heat up
my guess, and its purely a guess; is the cam is causing the computer to think there is a vacume leak which is causing the tcs to turn off and tranny to go into limpmode.. but like i said this is a huge unedcuated guess thats probally not right but i figure id throw it out there ....
i dunno what do you think?
BTW this is after a MS3 can and prc head swap
02-21-2006, 08:36 AM
#2
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There might actually be a vacuum leak. I've never owned an auto car, but seeing a few cam cars, I've never seen anything that have that low of vacuum. Do you know what it's pulling vacuum wise?
Mike
Mike
02-21-2006, 09:32 AM
#3
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no, what should i be pullin? also the car brakes fine all the time... and we tried to find a leak by spraying stater fluid arround the manifold and i didnt happen to notice any
02-21-2006, 10:27 AM
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He has a new MS3 cam which idles at a very high MAP.
Like 68-70kPa at 975RPM. The biggest vacuum leak, is
from the exhaust side.
The Helm manual says that P0106 code is set when the
PCM predicted MAP, based on engine speed and TPS,
differs from the actual MAP reading. Welcome to Lumpy
Cam SES World, looks like.
Curiously enough, the description for "Conditions For
Running the DTC" mentions that "The traction control
system is not active". Do not know why this pertains,
but his symptoms for TCS faulting include it (ASR OFF)
coming and going with throttle action.
So I think maybe there's some "linkage" and probably
the P0106 MAP expected max table (which, where he
idles, is way below actuals - 40-60kPa at zero TPS)
needs to be bumped up. Perhaps this will make the
TCS happy, though I'm unclear on whether this TCS
flakiness came on with the cam, or was there before.
Like 68-70kPa at 975RPM. The biggest vacuum leak, is
from the exhaust side.
The Helm manual says that P0106 code is set when the
PCM predicted MAP, based on engine speed and TPS,
differs from the actual MAP reading. Welcome to Lumpy
Cam SES World, looks like.
Curiously enough, the description for "Conditions For
Running the DTC" mentions that "The traction control
system is not active". Do not know why this pertains,
but his symptoms for TCS faulting include it (ASR OFF)
coming and going with throttle action.
So I think maybe there's some "linkage" and probably
the P0106 MAP expected max table (which, where he
idles, is way below actuals - 40-60kPa at zero TPS)
needs to be bumped up. Perhaps this will make the
TCS happy, though I'm unclear on whether this TCS
flakiness came on with the cam, or was there before.
02-21-2006, 03:08 PM
#6
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holy ****! im impressed jim! i dont think i would ever figured out all that! ill relay all this technical stuff along to dennis and see what he can do about it on thursday.. i'll get back to you with a followup
BTW tcs was fine until the install
BTW tcs was fine until the install
02-21-2006, 03:14 PM
#7
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yes, TCS will disable if P106 is set. Also, P0121 if i remeber rightly...
You need to change the MAP thresholds higher for these tests, as your cam is idling at higher MAP.
You need to change the MAP thresholds higher for these tests, as your cam is idling at higher MAP.
