the codes are saying it's running to lean on both banks i'm assuming that means the left and right sides of course but what can i do to stop the light from coming on? i've tried lucas fuel injector cleaner and bumped up the gas to 93 octane so far with no success and also replaced the fuel and air filters any other thoughts out there to try?
2007-02-20 13:18:50 · 9 answers · asked by joe b 1 in Cars & Transportation ➔ Car Makes ➔ Chevrolet
Your codes are p0171 & p0174 those are lean condition codes which you already know. The only way to (as you say stop the light from coming on)is to address the problem.
preform a visual check for any cracked vacuum lines ( there's only a couple of hoses on your engine ) then check to see if the oil filler cap is seated properly (a missing oil filler cap can set a lean code) (shops often forget to reinstall them after oil changes)also check the PCV valve for proper installation, check around the mass air flow for air leaks.
if ok. you're going to need a fuel presuure gauge, key on
engine off should be between 60-65 PSI will drop to 55-60 after a couple of seconds . if pressure is low , the pump is at fault...... turn key fom ON to OFF a couple of times to maximize fuel pressure when checking it...
another thing to check for, is exhaust leaks, are the exhaust doughnuts seated and tight.
I think i've given you enough things to get you started.
if you still can't find the problem, then I suggest a visit to your local GM dealer they have the proper diagnostic equipment to correctly diag. an injector balance must be preformed and that can only be done with the scanner.
a usual diag fee is about one hour.(don't know how much they charge per hour in your area) trust me, it's worth it.
2007-02-21 13:17:57 · answer #1 · answered by jesse 5 · 0⤊ 0⤋
Try disconnecting the battery for a few minutes. This should clear the codes. If it doesn't, the book you got your codes from should tell you how to clear the system. Once you have cleared the code, just wait and see if the check engine light comes back on in a few days or less. If it does, then I would take a long look at the sensors(oxygen, map). If it doesn't come back on, you have solved your problem.
2007-02-20 13:30:11 · answer #2 · answered by rexallen 3 · 0⤊ 1⤋
understand, that on board computer, monitors all engine, tranny and other vehicle systems. Your code foe lean mixture, has come about, because the computer has detected a problem with a senser on the engine some ware.
Face facts, your service center is the best place to diagnose and fix the problem, first time out.
2007-02-20 13:33:00 · answer #3 · answered by duster 6 · 0⤊ 1⤋
It could be running lean because of a vacuum leak,or fuel pressure to low.Have someone hook a scanner up and ck iac counts to see if it reads near zero,if so then you might have a vacuum leak.also high octane fuel will not help the lean conditon.
2007-02-20 15:07:07 · answer #4 · answered by deltech 4 · 1⤊ 0⤋
I just had this problem with a 2000 Blazer. I used a bottle of injector cleaning fluid twice and it cleared it up.
2007-02-21 08:46:38 · answer #5 · answered by Just Me 2008 2 · 0⤊ 1⤋
take out the fuel injector and clean it out with cleaner. thats all i can think of or you can take it to a chevy dealer and have them dignose the problem for you for free. i hope it starts running better. good luck.
2007-02-20 13:24:55 · answer #6 · answered by Brandon M 2 · 0⤊ 1⤋
Could be a bad oxygen sensor giving faulty reading, could be throttle position sensor or mass airflow sensor or . . .
2007-02-20 13:24:05 · answer #7 · answered by Say What? 5 · 0⤊ 1⤋
if it has a mass air flow sensor it is probably contaminated.
2007-02-20 13:22:13 · answer #8 · answered by shetaz5360 3 · 0⤊ 1⤋
could possibly the o2 sensors.
2007-02-20 13:25:13 · answer #9 · answered by hennster7 3 · 0⤊ 1⤋