My acura is trippin-> Somebody help me out
03-16-2008, 12:44 PM
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My acura is trippin-> Somebody help me out
I put an AEM short ram intake in my 97 CL, as well as headers and a 2.5" exhaust. My check engine light is always on and sayin system too lean. I have replaced both oxygen sensors as well as a trillion other things and I'm wondering if my intake may be the problem. If you can help me out, let me know.
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03-17-2008, 02:33 PM
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Because you have P0303 as well as P0171, you need to address P0171 first.
DTC P0171 - [Fuel supply system] System too lean
Possible Causes
Here's the troubleshooting flow chart
Check fuel pressure
<Is fuel pressure OK?>
DTC P0171 - [Fuel supply system] System too lean
Possible Causes
- Fuel Pump insufficient flow/pressure
- Fuel Feed Line clogged, leaking
- Fuel Pressure Regulator stuck open
- Fuel Injector clogged, air inclusion
- Gasoline doesn't meet Owner's Manual spec.
- Primary HO2S (Sensor 1) deteriorated
- MAP Sensor range/performance
- ERG System malfunction (too much flow)
- Valve Clearance
- Exhaust leak
Here's the troubleshooting flow chart
Check fuel pressure
<Is fuel pressure OK?>
NO
Good luck. <Is the fuel pressure too high or low?>
YESHigh - Check the fuel pressure regulator
Low - Check the gurl pump, fuel feed pipe, fuel filter, and fuel pressure.
Low - Check the gurl pump, fuel feed pipe, fuel filter, and fuel pressure.
Check the primary HO2S
- Start the engine. Hold the engine at 3,000rpm w/ no load (in Park or neutral) until the radiator fan comes on.
- Check the Primary HO2S (Sensor 1) output with the scan tool.
YES - Replace the Primary HO2S sensor.
NO
NO
Check for a sticking or leaking EVAP purge control solenoid valve:
With a vacuum pump, apply vacuum to the EVAP purge control solenoid valve from the intake manifold side.
<Does it hold vacuum?>
With a vacuum pump, apply vacuum to the EVAP purge control solenoid valve from the intake manifold side.
<Does it hold vacuum?>
NO - Replace the EVAP purge control valve
YES - Check the valve clearances and adjust if necessary. If the valve clearances are OK, replace the fuel injectors.
YES - Check the valve clearances and adjust if necessary. If the valve clearances are OK, replace the fuel injectors.
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