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08-24-2008, 08:57 PM
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#1 |
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Rookie
Join Date: Mar 2008
Posts: 7
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big problem
2002 zts zetec
throttle body focus central mass air focus central air intake steeda underdrive pully focus central oil cover focus sport sct X-2 91 octane and on first gear under 1000 rpm when i try to do quick acceleration , they do this http://fr.youtube.com/watch?v=6Lf7Rqtkf-s always !  my best time on 1\4 miles is 15.38  and when they do this is 17.69  somebody have idea why they do this  |
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08-25-2008, 05:54 AM
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#2 |
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Senior TEAM Member
Join Date: Mar 2002
Location: Wooster, OH
Posts: 2,999
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Re: big problem
Bad primary oxygen sensor. Have you been driving in a lot of wet weather recently?
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French Blue 2003 ZX3 Power Premium MTX Mild Naturally Aspirated build - Modded for driving enjoyment My Car Please help me with my engine build, buy my engine parts. |
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08-25-2008, 10:13 AM
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#3 |
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Rookie
Join Date: Mar 2008
Posts: 7
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Re: big problem
no .... oxygen sensor is on mass air ?
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08-25-2008, 10:47 AM
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#4 |
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Senior TEAM Member
Join Date: May 2005
Location: Marysville, MI
Posts: 3,118
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Re: big problem
also check the gaps on your plugs. i know for some reason mine had gotten opened up some and would miss fire at the lower RPMs, not exactly what your car is doing but worth a look
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Proud member of the 140k+ mile club 2001 zx3 crower stg3 cams/FC race header/2.5in exhaust/intake/tune/all poly mounts/H&R sport springs/KYB AGX dampers/SVT RSB/CM stg3 clutch/CM lightweight flywheel/Torsen T2 LSD/SVT front and rear bumper/SVT grill and headlights Waiting to build my SVT block for more powah!! |
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08-25-2008, 11:14 AM
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#5 |
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WHERE'S MY PAYCHECK?!
Join Date: Oct 2001
Location: America's Penis (aka Florida)
Posts: 8,232
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Re: big problem
I put a Pro-M mass air on my NA Focus and it ran like dog crap...it bogged, stuttered and generally sucked. It was on there for one day.
Also, Focus Central isn't known for their quality products...thats for sure.
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[FJ] focaljet - GUIDELINES - GALLERY - [FJ]WALLPAPER - STORE - SPONSORS - SEARCH - Any Questions? "Life is short. Break the rules. Forgive quickly. Kiss slowly. Love truly. Laugh uncontrollably, and never regret anything that made you smile." |
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08-25-2008, 04:17 PM
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#6 |
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Senior TEAM Member
Join Date: Mar 2003
Location: Madison, WI
Posts: 1,478
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Re: big problem
tho i am sure the oxygen sensor (the sensor that is in the exhaust pipe just before the catalytic convertor) or the mass airflow sensor (the intake airflow sensor) could cause that issue
i notice you have a FS tune. i have had a chip from FS on two different cars and my dad has one on his focus as well. they work great but on all three cars, i have noticed a particular quirk that the engine will stumble if you try to go full throttle at very low rpms. (and your video seems similar) but you have to realize, if you want to launch your car, you shouldn't be letting it get that low anyways. you don't want to bog the engine. i have cleaned mass air, and oxygen sensors and no real change. the answer for me is to drive it correctly.
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"She turned me into a Newt!"..."A Newt?"..."I got better..." "You might be an engineer if...In college, you thought Spring Break was metal fatigue failure" 2002 Black ZX5 - the mods are pilling up now! |
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08-25-2008, 05:28 PM
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#7 |
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TEAM Member
Join Date: May 2006
Posts: 442
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Re: big problem
oxygen sensor is on the exhaust mass air flow is on the intake
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TURBO LAG IS GODS WAY OF GIVING V-8 A CHANCE |
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08-25-2008, 07:09 PM
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#8 | |
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Senior TEAM Member
Join Date: Mar 2002
Location: Wooster, OH
Posts: 2,999
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Re: big problem
Quote:
Primary O2 sensor is before the catalytic converter in the exhaust. Somehow I missed that you had an aftermarket MAF sensor...I'm not familiar with the Focus Central setup, is that just a housing? Or is it recalibrated? If its a recalibrated MAF, that could definitely be the problem. From the nature of the post, though, it seems as though the car had been running fine with all of these modifications until recently. That leads me to stay with the O2 sensor.
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French Blue 2003 ZX3 Power Premium MTX Mild Naturally Aspirated build - Modded for driving enjoyment My Car Please help me with my engine build, buy my engine parts. |
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08-26-2008, 09:21 AM
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#9 |
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Rookie
Join Date: Mar 2008
Posts: 7
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Re: big problem
i need to change for new oxygen sensor OEM or tuning sensor ?? make , model ?
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