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> 4g63 Gdi Problem, Please help asap
mafiacopies
post Mar 20 2011, 11:52 PM
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Own a 2001 Mitsubishi with a 4G63 GDI 2.0l Engine.

Problem
Car will start and Idle fine at about 1K rpm, within 1 minute engine begins to flutter and Idle jumps to 1500 rpm, engine check light comes on
and flashes on and off. Car has no power and will no rev past 2K rpm
resulting error code is "intake air temperature sensor circuit 1"
Then shut off car and leave off for 2 to 3 minutes results in same problem.

Tried 2 different Maf sensors and same problem.

At my wit's end.... please any and all suggestions

Thanks in addvance.....
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KiT TeUnG 2549
post Mar 21 2011, 12:08 AM
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because the code isnt for the air flow meter. its for the Intake Air Temperature sensor. This sensor is located on the water exchanger piping near the thermostat. It reads the temp of the coolant and idealizes wut temp the intake air must be by using that figure and adjusts the fuel delivery and ignition spark table. The reason the light is flashing is because the engine is misfiring.
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mafiacopies
post Mar 21 2011, 01:56 AM
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QUOTE (KiT TeUnG 2549 @ Mar 21 2011, 12:08 AM) *
because the code isnt for the air flow meter. its for the Intake Air Temperature sensor. This sensor is located on the water exchanger piping near the thermostat. It reads the temp of the coolant and idealizes wut temp the intake air must be by using that figure and adjusts the fuel delivery and ignition spark table. The reason the light is flashing is because the engine is misfiring.



Thanks alot will check asap


note can the sensor be cleaned and reused or is a new sensor required
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TW2005
post Mar 21 2011, 05:53 AM
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QUOTE (mafiacopies @ Mar 21 2011, 04:26 PM) *
Thanks alot will check asap


note can the sensor be cleaned and reused or is a new sensor required



Unless it was an electrical connection issue, cleaning anything else will do nothing. I'd test it first before you just go out and buy a new one. If you have an ohmmeter or a multimeter or something that can measure resistance , remove the connector and probe the sensor terminals to measure what resistance is there.This could vary from 2100-2700 ohms at 20deg C to 260- 360 ohms at 80 deg C.

Does the problem you have continue even when the engine is hot? What's the ambient temperature of where you are?








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mafiacopies
post Mar 21 2011, 09:12 AM
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QUOTE (TW2005 @ Mar 21 2011, 05:53 AM) *
Unless it was an electrical connection issue, cleaning anything else will do nothing. I'd test it first before you just go out and buy a new one. If you have an ohmmeter or a multimeter or something that can measure resistance , remove the connector and probe the sensor terminals to measure what resistance is there.This could vary from 2100-2700 ohms at 20deg C to 260- 360 ohms at 80 deg C.

Does the problem you have continue even when the engine is hot? What's the ambient temperature of where you are?


Yes it does, but also when it is first started, the problem does not occur under semi-hard revs, only when the engine is allowed to idle.
thanks
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TW2005
post Mar 21 2011, 04:46 PM
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QUOTE (mafiacopies @ Mar 21 2011, 11:42 PM) *
Yes it does, but also when it is first started, the problem does not occur under semi-hard revs, only when the engine is allowed to idle.
thanks



I'm not convinced it's a temperature sensor issue. Are these electronic throttle bodies or cable dirven?
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mafiacopies
post Mar 21 2011, 09:20 PM
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QUOTE (TW2005 @ Mar 21 2011, 04:46 PM) *
I'm not convinced it's a temperature sensor issue. Are these electronic throttle bodies or cable dirven?


1st things 1st thanks to all who have replied, God Bless

2nd I'm also not convinced it's a temperature sensor issue.

3rd KiT TeUnG 2549 said
"because the code isnt for the air flow meter. its for the Intake Air Temperature sensor. This sensor is located on the water exchanger piping near the thermostat."

Checked that sensor according to manual (Please see the attached pdf..) and it is working..

Lastly the Unit I am using is a Mac Tools ET80 ver 1.14
http://www.mactools.com/product/tabid/120/p-325793-et80.aspx


Still stuck
Please help

Thanks again
Attached File(s)
Attached File  13A_GASOLINE_DIRECT_INJECTION__GDI_.pdf ( 2.19MB ) Number of downloads: 33
 
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mafiacopies
post Mar 22 2011, 05:12 PM
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Still stuck
Please help

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mafiacopies
post Mar 26 2011, 04:27 PM
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Good News to all
and Thanks again....
Problem Solved....

The main problem was with the Throttle Actuator motor....

Changed the complete throttle body and car running like new...

For reference to the problem... please see the following

http://www.youtube.com/watch?v=6EK1vtuNluA

Once again thanks to all who helped...

by the way upgraded from mac tools to auto boss V30 pro tools,
best thing since "slice bread", even reads codes on the Wife, can't fix them though.....

Thanks and God bless....

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TW2005
post Mar 26 2011, 04:45 PM
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QUOTE (mafiacopies @ Mar 27 2011, 06:57 AM) *
Good News to all
and Thanks again....
Problem Solved....

The main problem was with the Throttle Actuator motor....

Changed the complete throttle body and car running like new...

For reference to the problem... please see the following

http://www.youtube.com/watch?v=6EK1vtuNluA

Once again thanks to all who helped...

by the way upgraded from mac tools to auto boss V30 pro tools,
best thing since "slice bread", even reads codes on the Wife, can't fix them though.....

Thanks and God bless....


Good to hear, I had a funny feeling it was going to turn out to be a throttle body issue. One of the reasons I asked if it was electronic. having no experience with them makes it hard to give advice and a bit of a stab in the dark.

So did you extract any other codes out of it because I found all that temperature sensor talk very confusing for the symptoms you had. Did your scanner upgrade give you more accurate codes? I wondering if you had the correct code to start with?

I reckon they'd be rather complex, electronic throttle bodies would have to have a few safeguards in place for malfunctions.

I don't know if you picked up on this in that manual you posted but it did say this and they're all to do with the throttle body.

"As for P1220, P1221, P1223, P1224, and P1228, the engine warning lamp flashes. If malfunctions
are detected at the throttle position sensor (1st channel) and the throttle position sensor (2nd channel)
at the same time, or malfunctions are detected at the accelerator pedal position sensor (1st channel)
and the accelerator pedal position sensor (2nd channel) at the same time, the engine warning lamp
will flash."
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mafiacopies
post Mar 26 2011, 06:15 PM
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Yes the boss v30 did give the correct code P1220 , that led me to test the throttle body motor.
Found the loose magnet...

Thanks again,,,

Any suggestions for the Wife problems....
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TW2005
post Mar 26 2011, 07:34 PM
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QUOTE (mafiacopies @ Mar 27 2011, 09:45 AM) *
Yes the boss v30 did give the correct code P1220 , that led me to test the throttle body motor.
Found the loose magnet...

Thanks again,,,

Any suggestions for the Wife problems....


No, but you can have mine.

I feel bad not responding with my hunch now, may have saved you some time.

Other comments threw me a little, did not have the confidence , I should have at least highlighted that section in the DTCs as the flashing CEL was the key I feel.
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mafiacopies
post Mar 26 2011, 09:39 PM
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TW2005
You should never doubt your confidence, the sharing of information regarding problems, is what makes this world a better place.

Any advice from 1's experiences that one chooses to share with another, can and WILL someday saves someone's life or pocket.

Please keep up the good work that you are doing...

God Bless again...

P.s.

(IMG:style_emoticons/default/laughing.gif) Regarding the wife "swap" send all relevant information including date of arrangement to my email... if this works out, I will pay for
the shipping...... (IMG:style_emoticons/default/amen.gif)

Thanks Again
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TW2005
post Mar 26 2011, 10:06 PM
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QUOTE (mafiacopies @ Mar 27 2011, 01:09 PM) *
TW2005
You should never doubt your confidence, the sharing of information regarding problems, is what makes this world a better place.

Any advice from 1's experiences that one chooses to share with another, can and WILL someday saves someone's life or pocket.

Please keep up the good work that you are doing...

God Bless again...

P.s.

(IMG:style_emoticons/default/laughing.gif) Regarding the wife "swap" send all relevant information including date of arrangement to my email... if this works out, I will pay for
the shipping...... (IMG:style_emoticons/default/amen.gif)

Thanks Again


(IMG:style_emoticons/default/laughing.gif) jokes.

just as well she does not read mits forums (IMG:style_emoticons/default/thumbsup.gif)
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