Changing O2 Sensor?

[Gamingphreek]

Link

I have looked at the MAF Sensor in the past. Everything about the intake and MAF Sensor looked brand new. There was nothing to clean.

The car hasn't thrown a code yet, but I am noticing a loss in power (When I try to go from a dead stop it almost dies and then after I throw the clutch in and go again it works). Additionally, I replaced the Starter/Solenoid last year, and she is, AGAIN, having some trouble starting- PARTICULARLY after just being shut off (Running into store for one item or pumping gas or something).

I was going to replace the O2 sensor, but I'm not sure if that is the problem anymore.

Car is a 1995 Toyota Tacoma 2.7L I4 Regular Cab 4x4.

-Kevin

Edit: I pulled a history of codes from the ODBII reader and I don't see anything new, so I suppose I should just wait to spend $120 on a sensor.

 

[alpineranger]

It takes a while for the fuel trim values to re-stabilize at the correct value. Give it some time.

btw: ask them to give you the old catalytic converter. it's worth probably 100+ to the recyclers. You've no doubt heard about the catalytic converter thieves who are striking Toyota trucks/suvs hard. Old catalysts get contaminated but still retain all the precious metals (whose prices have been soaring), so to the recyclers, even "dead" converters have basically the same value as almost new ones.

 

[Gamingphreek]

Originally posted by: alpineranger
It takes a while for the fuel trim values to re-stabilize at the correct value. Give it some time.

btw: ask them to give you the old catalytic converter. it's worth probably 100+ to the recyclers. You've no doubt heard about the catalytic converter thieves who are striking Toyota trucks/suvs hard. Old catalysts get contaminated but still retain all the precious metals (whose prices have been soaring), so to the recyclers, even "dead" converters have basically the same value as almost new ones.

It was sent back on a Warranty claim since it failed and took an O2 sensor with it within 9 months of installation.

-Kevin

 

[cardiac]

Did you change or clean the MAF (Mass Air Flow Sensor)? It is just upstream from your air filter, and consists of 2 or 3 very fine wires pulled between 2 electrical contacts. It measures the amount of air flow passing through your airbox, and if dirty, can register a lower air flow and make the truck run lean. There is a cleaner spray available at any parts store. Don't use anything petroleum based, like Gumout carb cleaner. Google it for a specific procedure on cleaning the Toyota MAF.

Bob

 

[Gamingphreek]

I have looked at the MAF Sensor in the past. Everything about the intake and MAF Sensor looked brand new. There was nothing to clean.

The car hasn't thrown a code yet, but I am noticing a loss in power (When I try to go from a dead stop it almost dies and then after I throw the clutch in and go again it works). Additionally, I replaced the Starter/Solenoid last year, and she is, AGAIN, having some trouble starting- PARTICULARLY after just being shut off (Running into store for one item or pumping gas or something).

Any ideas guys?

 

[alpineranger]

Check the ignition system. Run some in tank fuel injector cleaner. If it isn't the fuel system or ignition system you may have a compression problem.

 

[Gamingphreek]

Originally posted by: alpineranger
Check the ignition system. Run some in tank fuel injector cleaner. If it isn't the fuel system or ignition system you may have a compression problem.

Ill pick up some BG44K today then. My Dad keeps trying to get me to settle with the STP stuff, but I have never put anything but BG in my car. I forget, you add it to a full tank or empty tank (I think full)?

As far as ignition system-- Are you saying check the starter/solenoid or is there something else you are suggesting.

As far as compression problem, would that be along the lines of a piston scarring a cylinder and therefore, since I wouldn't have a sleeve on it, that cylinder isn't getting good compression? Or would it be more simple like a bad intake manifold gasket?

-Kevin

 

[DOTC]

Ive always added it on a empty tank and then filled the tank. Fuel cleaner mixes with the gas. Ive always got a kick out of people bouncing on the bumper to mix the cleaner in the a full tank.