OK Here's The Scenario
May-9th-2003, 09:56 AM
#1
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Location: Ottawa, Ontario, Canada
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OK Here's The Scenario
I have a 2001 Mazda Protege ES 2.0 5spd. I've installed a......
J-Spec Intake Manifold(FS-ZE)
Bosal 4-2-1 Header(93-95 Mazda MX-6)
Custom 2.5" Cat-less exhaust system.
I installed the intake manifold myself. Then 3 weeks later i had the header exhaust system installed. Did a dnyo pull. Picked up the car. On my way home excited from the mods that i had done i decided to hammer it a bit off the light. POOOF!!!! The blueish/black smoke coming from my tail pipe was insane. So i installed a air/fuel ratio gauge. At WOT the car runs pig rich.....it has been running rich for a month now. I took to a garage here, and the mechanic noticed the the vacuum lines for the VICS and VTCS controllers where installed backwards. Forcing the VTCS to stay shut. Fixing this problem toned down the richness a bit.....Also not to mention that my EGR is blocked. Then he ran a compression test, and a leak down and everything is fine. Its the fact that i'm running rich.....Why the hell is this occuring? Could someone shed some light onto my concerns.
J-Spec Intake Manifold(FS-ZE)
Bosal 4-2-1 Header(93-95 Mazda MX-6)
Custom 2.5" Cat-less exhaust system.
I installed the intake manifold myself. Then 3 weeks later i had the header exhaust system installed. Did a dnyo pull. Picked up the car. On my way home excited from the mods that i had done i decided to hammer it a bit off the light. POOOF!!!! The blueish/black smoke coming from my tail pipe was insane. So i installed a air/fuel ratio gauge. At WOT the car runs pig rich.....it has been running rich for a month now. I took to a garage here, and the mechanic noticed the the vacuum lines for the VICS and VTCS controllers where installed backwards. Forcing the VTCS to stay shut. Fixing this problem toned down the richness a bit.....Also not to mention that my EGR is blocked. Then he ran a compression test, and a leak down and everything is fine. Its the fact that i'm running rich.....Why the hell is this occuring? Could someone shed some light onto my concerns.
May-9th-2003, 10:32 PM
#4
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Join Date: Mar 2002
Location: Spokane WA
Posts: 453
First off, if you eliminate both cats, then you will set DTC's. The car will run really rich if it doesn't see the correct values out of the O2 sensors. Second, after researching it, you do need a certain amount of backpressure for the EGR to work. If you just eliminate the EGR, you totally screw the computers ability to adjust the mix at cruise.
Next, hooking up the VTCS solenoid and the VICS solenoid backwards causes the VICS to open at cold start (not good for warm up) and the VTCS to close at around 4800. That will kill performance and cause problems with mixture that will set a DTC also. Did you just decide to run with a check engine light?
Next, hooking up the VTCS solenoid and the VICS solenoid backwards causes the VICS to open at cold start (not good for warm up) and the VTCS to close at around 4800. That will kill performance and cause problems with mixture that will set a DTC also. Did you just decide to run with a check engine light?
May-12th-2003, 02:53 PM
#5
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Join Date: Jan 2002
Location: Ottawa, Ontario, Canada
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Too make everything clear. The solenoids are fine. The car just runs rich at WOT, not at idle or at cruise. Thats the main concern. So if i'm at 3000rpm and i punch it, its rich all the way to redline.
May-12th-2003, 11:51 PM
#6
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Join Date: Sep 2001
Location: Dallas, TX
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