Question about 2000 Oldsmobile Alero

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Driving 55mph cars drops to 25. I have a new fuel filter. I have new oxygen sensor, brakes, catalic converter, vaccum lines, traction light comes on for no reason. Noone knows whats wrong and money is tight. I need better answers.

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Fuel injection cleaner.

Posted on May 04, 2010


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On the 2004 honda crv along with code 1259vtec, l also have code 0420 which deal with the oxygen. If I upgrade the gas and put in lucas fuel injection cleaner, is it possible to correct the condition

NO--- code p0420 refers to the catalic converter system, bank 1 --efficiency below threshold===causes --cat converter, wiring-HO2S sensor 2
code p1159 refers to heated oxygen sensor (HO2S) -front circuit low voltage positive terminal===causes--wiring--HO2S--ECM programming---ECm

In both codes the heated oxygen sensor is mentioned so I would have it replaced before I spent money on a cat converter.

Feb 09, 2015 | 2004 Honda CR-V

2 Answers

My 93 rodeo acts like it's running out of gas when driving. Starts and idles just fine

Someone would need to check the fuel pressure with a gauge and replace the fuel filter to eliminate the pump. Assuming the check engine light is not on, it could be a vac leak or other problem.
The most common problems are a leaking EGR valve or faulty throttle position sensor, but those components should make the check engine light come on if they fail.

Jan 04, 2013 | 1993 Isuzu Rodeo

2 Answers

No power on take off and can't maintain speed going up hills. Also, getting horrible gas mileage.

Hello there's a couple things you can try. First off check your tire pressure to make sure they are at the manufactures levels. If you open the driver door there is a sticker in the door jam with the ideal tire pressures.
For the power issue I suggest changing your fuel filter and air filter. You could also buy some fuel injector cleaner and dump it in the gas tank. I think that the power issued will be solved after you changed those filters especially the fuel.
If that doesn't work it may be a sign that your fuel pump is going out. Usually they go out with no warning and no symptoms. Try the above and write me back with any questions.

Jul 13, 2011 | Toyota 4Runner Cars & Trucks

3 Answers

Can a bad downstream oxygen sensor cause a rough idle on a 2003 chevy venture

no, the downstream sensors do not feedback into the control of the engine--they only detect the effectiveness of the catalytic converters. If the sensor is detecting excess fuel, the problem could be with your fuel pressure regulator, and that would also explain the rough idle. Do you have a trouble code you can pass to me?

Dec 12, 2010 | 2003 Chevrolet Venture Passanger

1 Answer

The engine light is on. they replaced a air sensor on the engine at bank 1 line 1, that is what it showed when they read it. before the converter, they cleared it and the light went off. the light came...

first diagnose it, what s the code given, go on diagnosti aid, is your problem oxygen sensor, check catalize, you may remove it or replace a new one

Jun 18, 2010 | 1999 Lexus RX 300

1 Answer

Check engine light on. took the car to auto zone to put it on a scanner. trouble code p0420. catalyst system efficiency below threshold. probable cause; large vaccum leak, fuel system fault, ignition...

Diagnostic code produces P0420 catalyst system efficiency below threshold-Bank 1. Probable causes are listed as follows:
1-air leak in exhaust before rear 02 sensor, 3-Fuel system fault,
4-faulty catalytic converter.

May 31, 2010 | 2001 Nissan Altima

2 Answers

328 i 1997: BMW Start up problem: Stuttering

it sounds like the cat is blocked,

Feb 17, 2009 | 1997 BMW 328

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