i have a friend with a '89 Firebird with the 2.8l. ECM is flashing a code 44, and everytime it comes on, car runs really rough with low pick up. Im thinking that his oxygen sensor is going bad cause the idle srops and rises frequently, and maybe his tranny is starting to slip and not go into gear. Anyways it vibrates over 55. Any costs of trannys and is it hard to change the sensors??

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'91 Firbird TBI 305

 

oxygen sensors never got bad, they only get dirty, this is info is straight from a science teacher at UT who is a car nut. he said just remove your air cleaner and go run it hard on the eway and get it hot, or drive around in second gear. they can get dirty but all you gotta do is get it hot and it will clean it off.

this is why they put it as far up on the pipe as they can, on a v engine right where the y connects and on a straight, up near the head, so it stay hot all the time and works the best.

also, you can add a second on near it, or just patch into it. hook up a volt meter too it and watch the air fule ratio your self, or use it too tune the car, i got he chart somewhere but onthe volt meter you want to be in betwen 250-800. lower being lean.

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http://PCperformance-usa.com/86bird/86bird.html

 

Alright, ill tell him to give it a shot. Im just trying to save him some money right now. Pep-Boys wanted 65 dollars just to hook it up to their computer, so i thought the jumper wire was a little cheaper. But still i believe it needs a new tranny too.

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1991 Firebird 5.0 TBI
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- 5 speed manual
- Stock Ground Effects
- Gutted catalyic w/ 2 1/2 in. Flowmasters.
- T-Tops
- Custom racing paint
- Borg-Warner Cap & Rotor
- AC-Delco Platnum plugs
- Valvoline 10W-30
- Mr. Gasket chrome rocker arm covers
- Custom painted interior, with blacklight effects installed

Stereo
----------
- Excelon head unit
- Polk Audio speakers w/ added tweeters
- Alpine 4 channel amp
- Kicker ZR series amp pushing 2 JL 12"ers


Victories
------------
Neighbors rebuilt '87 Camaro 5.0 with a 4 Barrel, Eats Automatic Mustang 5.0's for breakfast. Gotta learn the stick.

Defeats
-----------
Brand new BMW. I was amazed myself at that thing.

 

The oxigen sensor is easy to remove and inexpensive,if the engine has done more than 100000miles,change it!

 

Yea, i was thinking about changing it anyway just for the sake of being safe.

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1991 Firebird 5.0 TBI
------------------
- 5 speed manual
- Stock Ground Effects
- Gutted catalyic w/ 2 1/2 in. Flowmasters.
- T-Tops
- Custom racing paint
- Mr. Gasket chrome rocker arm covers
- Custom painted interior, with blacklight effects installed

Stereo
----------
- Excelon head unit
- Polk Audio speakers w/ added tweeters
- Alpine 4 channel amp
- Kicker ZR series amp pushing 2 JL 12"ers

 

actualy, if u get coolent in ur O2 sensor then there is no way to get it clean. along with probably a few other things. just to let ya know

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series