P0171: System too lean
12-10-2005, 12:46 AM
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P0171: System too lean
need opinion on this.Refering to my previous post https://www.rx8club.com/series-i-tech-garage-22/starting-problems-75540/. My 8 recently had starting problem (hard start) & engine stalls at idle.
This is what i found out by retreiving DTC with sCANalyzer : Pending P0171 i.e. system too lean. Attached below is DTC Table. This might give me idea of what's going on with my 8.
Since i've reset ECU & KAM long ago, so there's no CEL/MIL been stored in PCM. I retrieve this "P0171" code (1 drive cycle) while the car is station & engine start by the help of alcohol.
I need to drive the car by next week (Drive Mode), so that i can throw CEL blinking & flashing all the way. Then i'll know what DTC appear when i retrieve it.
Stay tune & wish me luck
.
12-10-2005, 03:14 PM
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Originally Posted by swoope
i would pull out the maf sensor and clean it with electronics cleaner. easy to do. if i recall your car was flooded.
it is a start.
beers
it is a start.
beers
12-11-2005, 07:36 AM
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Originally Posted by Rasputin
Can you post the freeze frame data (all the engine parameters at which the error happens) given by the sCANalyser?
Fabrice
Fabrice
12-11-2005, 07:40 AM
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Originally Posted by swoope
i would pull out the maf sensor and clean it with electronics cleaner. easy to do. if i recall your car was flooded.
it is a start.
beers
it is a start.
beers
12-11-2005, 09:05 PM
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Originally Posted by crossbow
Are you running with an intake? The p0171 cel is one of the most common cel's seen in the 6 for those running intakes.
12-11-2005, 10:17 PM
#10
Originally Posted by crossbow
Are you running with an intake? The p0171 cel is one of the most common cel's seen in the 6 for those running intakes.
12-16-2005, 12:02 AM
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Originally Posted by j9fd3s
yep, put the factory intake on and the cel will go away....
My friend said that JDM ECU originally set the AF slightly lean. AF will be more leaner when replace the stock airbox to aftermarket intakes. Can anybody make me clear about this?
Last night, i don't manage to drive the car (gas tank nearly empty). But i'll drive it tonite.
12-16-2005, 12:10 AM
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About this AF thingy.... i have in my mind about TurboXS DTEC FC. Since there's no ECU flash at the dealer, i'll go for this stuff when it's confirm that no parts/sensors are malfunction. Juz my thought. Any recommendation?
12-17-2005, 10:40 PM
#14
you're getting un-metered air into the engine. i'd check vacuum lines, loose intake connections, etc. spray some brake clean on suspected areas and see if the rpm or engine changes its speed. i'd start by doing that first. no leaks found means it's something electrical.
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12-19-2005, 10:50 PM
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Originally Posted by Hymee
Any exhaust changes - eg O2 foolers, CAT replacment/removal???
Cheers,
Hymee.
Cheers,
Hymee.
12-19-2005, 10:54 PM
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Originally Posted by Im_DANomite
you're getting un-metered air into the engine. i'd check vacuum lines, loose intake connections, etc. spray some brake clean on suspected areas and see if the rpm or engine changes its speed. i'd start by doing that first. no leaks found means it's something electrical.
12-19-2005, 11:12 PM
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OMG. I 4got to mention that i've test drive the car last friday night. Sadly i don't get any CEL coz i only manage to drive it 1.5km only. That night the road was very congested/rainy condition, so i give up. As u all know that i had to press the accelerator pedal constantly to make the engine rev at least 2,000rpm (engine will stall if rpm drop below 2000rpm). I'll try to drive the car at midnight on this weekend. Distance target 15-30km at highway. Hopefully i'll get CEL from this upcoming attempt.
12-20-2005, 10:32 PM
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Originally Posted by Hymee
I would have thought it would already have a CEL if it is running that poorly!
Cheers,
Hymee.
Cheers,
Hymee.
12-20-2005, 11:46 PM
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4got to take a pic of sCANalyzer monitoring the details of my 8. All i remember is whether the MAF or AFR is more than 15.0+, the highest is 19+. And that's too damn lean am i right?
Last edited by RX8 Brunei; 12-20-2005 at 11:48 PM.
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RolleX8 (07-20-2021)
01-02-2006, 08:59 PM
#22
So do you have a mate with an RX-8 you can try swapping the MAF sensor with? Simple to do - undo 2 screws and a connector. If that fixes it then you can order one from spare parts. Don't forget when it is all fixed, you might have to reset the CEL (or you didn't get one?? - weird) using your sCANalyser.
01-02-2006, 09:21 PM
#23
Air + Fuel + Spark = Boom
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He's gonna do that today... He practically knows every rx-8 in this country.....
I just hope that it is as simple as a MAF problem.... Good luck bro
I just hope that it is as simple as a MAF problem.... Good luck bro
01-03-2006, 06:43 AM
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Originally Posted by RX8 Brunei
Confirm MAF sensor malfunction.
