P0171 - System too lean HELP
#1
Registered
Thread Starter
P0171 - System too lean HELP
Hi Everyone,
I know this subject has covered over time, but not for SII. I am not sure if any other S2 has recieved this Check Code before. A few believe in the S1 area this a vacuum leak usually. Any new info.
I have:
BHR Coils ~50k (maybe time to change out)
HFC w/ 3" mp
RB intake
RB Race Exhaust
89k+ Miles
Track the care pretty frequently, but not much this year.
Havent felt any power loss, so I dont think its major problem. I has noticed a lot of back firing thought and idle isnt a lil lil rough.
I know this subject has covered over time, but not for SII. I am not sure if any other S2 has recieved this Check Code before. A few believe in the S1 area this a vacuum leak usually. Any new info.
I have:
BHR Coils ~50k (maybe time to change out)
HFC w/ 3" mp
RB intake
RB Race Exhaust
89k+ Miles
Track the care pretty frequently, but not much this year.
Havent felt any power loss, so I dont think its major problem. I has noticed a lot of back firing thought and idle isnt a lil lil rough.
#3
Registered
Thread Starter
#4
Modulated Moderator
iTrader: (3)
It would have to be before the o2 sensor...so unless you have had the manifold off...or you have a header that could have warped...less likely
Most common if the VFAD is removed (if you have an aftermarket intake)...is for the VFAD nipple plug to have fallen off.....
Most common if the VFAD is removed (if you have an aftermarket intake)...is for the VFAD nipple plug to have fallen off.....
#5
Registered
Thread Starter
THANKS!
#7
this is from the S1 manual, System too lean
DETECTION CONDITION
• The PCM monitors the short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) when under closed loop fuel control. If the fuel trim is more than the specification, the PCM determines that the system is too lean.
POSSIBLE CAUSE
• Front HO2S malfunction
• Excess air suction in intake-air system
• Leakage exhaust gas
• MAF sensor malfunction
• Fuel line pressure malfunction
• Fuel pump unit malfunction
• Leakage fuel
• Ignition system malfunction
– High-tension lead malfunction
– Incorrect power supply to ignition coil
– Ignition coil malfunction
• Insufficient compression
– Metering oil pump malfunction
– Engine oil condition malfunction
– Rised oil pressure
– Oil passage malfunction
– Engine malfunction
• Fuel injector malfunction
• PCM malfunction
Thread
Thread Starter
Forum
Replies
Last Post
arexatemate
RX-8 Parts For Sale/Wanted
6
10-28-2019 08:16 AM