03-03-2007, 04:49 PM
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#1
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Registered User
Join Date: Sep 2006
Location: chicago
Posts: 3,510
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i tried cleaning it with electric contact cleaner like some people on renntech suggested, but no luck.
evo says that there should be no CEL occuring when installed 
also, whats the best way to see if its the MAF or if its something else?
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"I couldn't find the sports car of my dreams, so I built it myself." ~F. Porsche
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Last edited by djomlas; 03-03-2007 at 05:03 PM.
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03-05-2007, 10:55 AM
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#2
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Registered User
Join Date: Apr 2006
Location: Chicago
Posts: 1,518
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Quote:
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Originally Posted by MNBoxster
Hi,
It's the EVO...
Happy Motoring!... Jim'99
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Jim,
Why do you think the EVO would throw up codes related to throttle position ?
Just wondering...
Thanks,
Nick
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03-05-2007, 12:16 PM
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#3
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Registered User
Join Date: Sep 2006
Location: chicago
Posts: 3,510
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it could and it couldnt.
from my research b4 the purchase, no one reported one, so im not sure yet if its the intake or jsut that it happen to go bad after i put the intake.
i cleaned up the MAF w contact electrical cleaner, reset the code, and CEL went off, didnt come on yet, so i will report back
__________________
http://i34.tinypic.com/157yslk.jpg
"I couldn't find the sports car of my dreams, so I built it myself." ~F. Porsche
Gemballa springs::litronics::Eurotech 18s(275/225)::B&M::MOMO wheel::
exhaust cutouts::EVOcoldair intake::OEM smoked tails & sidemarkers::
colormatched bumperettes::Top Speed Pro-1 exhaust::
my cardomain/pictures page
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03-05-2007, 03:25 PM
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#4
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Registered User
Join Date: Sep 2005
Location: Minneapolis/St. Paul, Minnesota, USA
Posts: 3,308
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Quote:
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Originally Posted by NickCats
Jim,
Why do you think the EVO would throw up codes related to throttle position ?
Just wondering...
Thanks,
Nick
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Hi,
@ Nick - There are lots of components which do not have their own CEL. For instance take a MAF - there is no OBDII or 'P' code which states "Bad MAF". This is because the sensor either isn't self-diagnosing, or for reasons of cost, memory space, or complicated code, the DME doesn't monitor the sensor's specific condition.
Consequently, many of the CELs report a variance to known or expected voltages or conditions. Therefore, you often need to do a little detective work figuring out which components affect such conditions and using experience (we all know how susceptible the MAF is to any screwing around), intuition and deduction, zero-in on the offending component, such as in this instance.
I say it was the Evo because when it was swapped, I suspect that it either jarred the MAF into failing, or let loose some dirt from the intake tubing and set off the MAF. A MAF malfunction could manifest itself into a condition resembling a throttle body issue - Revs not matching TPS (Throttle Position Sensor), or OČ Sensor data not matching expected Data (too rich/lean), etc.
This is why it isn't that unusual to see CELs when people add or disturb components which were otherwise working fine (or at least within acceptable tolerances).
I deduced that since dj reported the EVO swap, this was complicit in the issue. If he hadn't added the EVO, I suspect the car would have never thrown the code (of course, this is speculating)...
Happy Motoring!... Jim'99
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03-05-2007, 08:42 PM
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#5
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Registered User
Join Date: Sep 2006
Location: chicago
Posts: 3,510
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true that Jim,
maybe if i didnt touch anything it wouldnt throw a code, but maybe it would, i guess well never know.
today i put over 50 miles on the car and no code but when i got home i got a CEL, i was like sht i jinxed it.
it turns out that when i gased up i didnt close the gas cap all the way, phew 
it was a p0466 code
__________________
http://i34.tinypic.com/157yslk.jpg
"I couldn't find the sports car of my dreams, so I built it myself." ~F. Porsche
Gemballa springs::litronics::Eurotech 18s(275/225)::B&M::MOMO wheel::
exhaust cutouts::EVOcoldair intake::OEM smoked tails & sidemarkers::
colormatched bumperettes::Top Speed Pro-1 exhaust::
my cardomain/pictures page
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03-05-2007, 08:58 PM
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#6
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Registered User
Join Date: Sep 2005
Location: Sacramento
Posts: 3,417
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Quote:
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Originally Posted by djomlas
it turns out that when i gased up i didnt close the gas cap all the way, phew
it was a p0466 code |
I'm gonna remember that for future reference. Good info! 
__________________
-99' Zenith Blue 5-spd...didn't agree with a center divider on the freeway
-01' S Orient Red Metallic 6-spd...money pit...sold to buy a house
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03-05-2007, 09:18 PM
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#7
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Registered User
Join Date: Sep 2006
Location: chicago
Posts: 3,510
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well there could be a few other things, but that should be the 1st to check out since its free and easy to check 
__________________
http://i34.tinypic.com/157yslk.jpg
"I couldn't find the sports car of my dreams, so I built it myself." ~F. Porsche
Gemballa springs::litronics::Eurotech 18s(275/225)::B&M::MOMO wheel::
exhaust cutouts::EVOcoldair intake::OEM smoked tails & sidemarkers::
colormatched bumperettes::Top Speed Pro-1 exhaust::
my cardomain/pictures page
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03-07-2007, 06:59 PM
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#8
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Registered User
Join Date: Apr 2006
Location: Chicago
Posts: 1,518
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Quote:
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Originally Posted by MNBoxster
Hi,
@ Nick - There are lots of components which do not have their own CEL. For instance take a MAF - there is no OBDII or 'P' code which states "Bad MAF". This is because the sensor either isn't self-diagnosing, or for reasons of cost, memory space, or complicated code, the DME doesn't monitor the sensor's specific condition.
Consequently, many of the CELs report a variance to known or expected voltages or conditions. Therefore, you often need to do a little detective work figuring out which components affect such conditions and using experience (we all know how susceptible the MAF is to any screwing around), intuition and deduction, zero-in on the offending component, such as in this instance.
I say it was the Evo because when it was swapped, I suspect that it either jarred the MAF into failing, or let loose some dirt from the intake tubing and set off the MAF. A MAF malfunction could manifest itself into a condition resembling a throttle body issue - Revs not matching TPS (Throttle Position Sensor), or OČ Sensor data not matching expected Data (too rich/lean), etc.
This is why it isn't that unusual to see CELs when people add or disturb components which were otherwise working fine (or at least within acceptable tolerances).
I deduced that since dj reported the EVO swap, this was complicit in the issue. If he hadn't added the EVO, I suspect the car would have never thrown the code (of course, this is speculating)...
Happy Motoring!... Jim'99
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Thanks, Jim !
Nick
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