05-14-2010, 12:02 AM
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#1 |
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3" Exhaust
Join Date: Mar 2010
Location: Oxnard
Posts: 109
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boosting wrong. help please
hey my car just got back from shop because headgasket job. before the boost gauge would rise, but now it doesnt. were is the connections to see if they misplaced them??. when driving doesnt feel as quick. gears dont pull as much. takes forever to get to 60. suggestions?? and yes im getting aftermarket boost gauge
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05-14-2010, 04:11 AM
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#2 |
 Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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Sounds more to me like an intake coupler is off, loose or has a big tear in it.
The boost gauge's sensor is by the cruise control actuator behind the front driver's side wheel well... it is not used by the ECU though so while the gauge won't read anything it wouldn't affect performance at all. EDIT: And check for error codes, the details are in the MKIII FAQ.
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05-15-2010, 05:17 AM
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#3 |
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3" Exhaust
Join Date: Mar 2010
Location: Oxnard
Posts: 109
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ok so now its boosting correctly according to aftermarket gauge. still feels kinda wierd, whats stock boost 5-psi??
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05-16-2010, 07:20 PM
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#4 |
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Bone Stock w Upgrades ;-)
Join Date: Apr 2010
Location: Tampa Bay
Posts: 210
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Stock Boost
I believe its computer limited at 7.3 PSI
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05-16-2010, 07:53 PM
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#5 |
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Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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No, the ECU has no idea what boost level you're running. The only control is the wastegate actuator (and boost leaks). The acceptable boost range is something around 9 to 6psi (I can't remember right now, it's in the TSRM though if you wish to look it up)... it's not uncommon for the wastegate actuator's spring to weaken over time causing a drop in boost pressure.
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If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar ---> |
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05-16-2010, 08:22 PM
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#6 |
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Bone Stock w Upgrades ;-)
Join Date: Apr 2010
Location: Tampa Bay
Posts: 210
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I have added 3.5mm of washers under the waste gate bracket to shim it up.
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05-16-2010, 10:26 PM
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#7 | |
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Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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Quote:
Here: http://www.gusmahon.org/html/boostcontrol.htm
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If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar ---> |
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05-18-2010, 07:03 PM
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#8 |
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Stock
Join Date: Mar 2010
Location: Carlisle, Pa
Posts: 9
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boost problem
ok so leme start i replaces plugs and wires. replaced intake tube. checked for leaks cant seem to find any. my problem is if i slowly give full throttle i boost great but if im on it hard it boosts half way up the rpms then feels like it starts to miss. at idle i smell fuel and it spudders every 3 seconds not a misfire spudder but like a blank spot hard to explain more like grrrrrrrrrrPgrrrrrrrrPgrrrrrrr if thats understandable. also if im quick shifting under full throttle it falls as soon as i shift gears and hit throttle again there is a noticable miss but instantly comes back. only throws check engine light if im on it hard. any ideas??????
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05-18-2010, 07:44 PM
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#9 |
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Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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if the check engine light is coming on at all you need to check for codes. critical codes may only cause it to light up momentarily... many codes don't trigger the light at all.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar ---> |
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05-18-2010, 09:17 PM
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#10 |
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Stock
Join Date: Apr 2010
Location: Johnson City, Tn
Posts: 19
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What can you boost safely on a stock setup?
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