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How do I know if my MAF and TPS is busted/diffective
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Author:  buddz [ Mon Jan 18, 2010 1:50 pm ]
Post subject:  How do I know if my MAF and TPS is busted/diffective
How do I know if my Maf and TPS is busted? I have a 4G15 8valve engine..thanks
Author:  Mirage90 [ Mon Jan 18, 2010 2:06 pm ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
x2
Except mine is a 12v
Author:  j2dapo [ Mon Jan 18, 2010 3:07 pm ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
Both of those sensors will throw a check engine code
Author:  buddz [ Mon Jan 18, 2010 5:56 pm ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
yup i have a check engine code:

the scenario:
after puting the key to ON position the check engine goes off after 5 seconds then start it after then cruising for about half mile the check engine goes ON again. One more thing is my idle doesn't go up during cold start but when I tested the idle switch motor manually its working fine.
Author:  Mirage90 [ Mon Jan 18, 2010 8:41 pm ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
Quote:
Both of those sensors will throw a check engine code
i dont have my o2 sensor unplug, because i have a new down pipe w/o o2 sensor. So my check engine is always on.
Could ther be any more signs other then "Check Engine" light? :lol:
Author:  Coltsfan [ Mon Jan 18, 2010 8:57 pm ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
Quote:
Quote:
Both of those sensors will throw a check engine code
i dont have my o2 sensor unplug, because i have a new down pipe w/o o2 sensor. So my check engine is always on.
Could ther be any more signs other then "Check Engine" light? :lol:
It would have other codes besides the O2 sensor code. Perhaps you should hook up the O2 sensor and then see if there's anything else in need of attention.
Author:  Mirage90 [ Mon Jan 18, 2010 11:31 pm ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
Quote:
Quote:
Quote:
Both of those sensors will throw a check engine code
i dont have my o2 sensor unplug, because i have a new down pipe w/o o2 sensor. So my check engine is always on.
Could ther be any more signs other then "Check Engine" light? :lol:
It would have other codes besides the O2 sensor code. Perhaps you should hook up the O2 sensor and then see if there's anything else in need of attention.
I have no idea where that o2 sensor is now. The down pipe does not have a hole for it to be put in.
Author:  Coltsfan [ Tue Jan 19, 2010 1:35 am ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
You need to buy a hole (they're like $7.00) and weld it in. Then buy a sensor, and install it. Your car's never going to go into closed loop operation without the O2 sensor.
Author:  buddz [ Tue Jan 19, 2010 5:02 am ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
Quote:
You need to buy a hole (they're like $7.00) and weld it in. Then buy a sensor, and install it. Your car's never going to go into closed loop operation without the O2 sensor.
how much for the O2 sensor sir?
Author:  Coltsfan [ Tue Jan 19, 2010 8:54 am ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
Quote:
Quote:
You need to buy a hole (they're like $7.00) and weld it in. Then buy a sensor, and install it. Your car's never going to go into closed loop operation without the O2 sensor.
how much for the O2 sensor sir?
Probably $60 and worth every penny if you need one.
Author:  Mirage90 [ Tue Jan 19, 2010 11:00 am ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
Quote:
Your car's never going to go into closed loop operation without the O2 sensor.

I dont understand this sir? Closed loop operation?
Author:  Flying Eagle [ Tue Jan 19, 2010 8:59 pm ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
Engine cold and maybe the first minute of operation = open loop = just dumping in fuel based upon fuel map tables.
Engine warming up, after first minute of operation and when 02 sensor is hotter = closed loop = more controlled air/fuel ratio at all times but WOT when preset values are used again.
Author:  Mirage90 [ Wed Jan 20, 2010 12:55 pm ]
Post subject:  Re: How do I know if my MAF and TPS is busted/diffective
Quote:
Engine cold and maybe the first minute of operation = open loop = just dumping in fuel based upon fuel map tables.
Engine warming up, after first minute of operation and when 02 sensor is hotter = closed loop = more controlled air/fuel ratio at all times but WOT when preset values are used again.
Awe ok i got cha. Thnks bro :supz:


You sum things up really easy
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