I did a engine check on my car and found that the car is runing lean. what can casue this? what actions should i take towards fixing it? I can barly if at all drive it. Not enough gas gettign tot engine. When driveing feels like the out of gas. please any advice on what actions to take to fix this car. thx.

 

First and foremost, how did you determine it was running lean?

 

Better yet, if it's an '89 Z28, why does it have a TBI?

 

I got the codes by gettign the following error codes...

44. H2 sensor lean

32. fault in barometric preasure senson circuit OR Fault in exhasust gas recirculation valve diagnostic switch OR Fault in electronic vacuum regulator valve.

23. Low temperature at manifold air temp sensor OR Throttle position sensor error

and as far as being a tbi....dunno

 

Let me know what you find. I get the same O2 lean code all the time. However, the car runs great and I replaced the O2 sensor so I know it's not that.

 

Tiger,

You should determine the cause of the MAT sensor fault (Code 23). It may be damaged, or it may be unplugged, or it may have been unplugged while the engine was running and the code has not yet been purged from memory.

You should also determine the cause to the EGR fault (Code 32).

Once you solve those, the lean O² sensor may solve itself.

 

where do i check this mat senor error? do i look for a mat sensor?

 

Really,you've got no buisness fooling with it.
Take it to a mechanic,you've got no clue what your doing,and you'll only cost yourself more in the long run.

 

That's kinda harsh, theres things one can do to a car that cant make things worse that might actually be helpful. Either way, cant learn without actually trying, at least its on his own car and not someone else's.

Try cleaning the tb and check the condition of the air filter(s). A lot of the time the running out of gas feel is more of a not enough air coming in thing. Youre not far from me so your car is probably doing a lot of crap (thanks to the weather) the last few weeks that mine is. If you need help on this, lmk.

 

Indeed this is a harsh statement and nothing but a discouraging comment, TBI engines are honestly not that difficult to work on. When I got my car over the summer, I didn't have a damned clue of what to do what was what and where was where. I mean I couldn't tell you from the life of me. But did that stop me? Nope, I was determined to know my engine and I do now.

Now let's fast forward to present time. I know what the hell I am doing, because I read alot about my engine, I can tackle routine maintenance stuff, I can identify my engine bay from head to toe (well give or take a few things) I can work just fine on it (albeit it may take me a bit longer, but I am only one person) since I bought the car in July I have done numerous stuff to it, spark plug replacement, O2 sensor, distributor cap+rotor, changed out a tranny mount using a retarded car that doesn't like jackstands, fixed vacuum line...list goes on. I think he should try and tackle it, all he needs is a Haynes Manual which is like 15 bucks and he can do pretty much any basic stuff. I only took my car to the shop when it came to emmissions, thats about the only thing I can't tackle, not because its hard, but because there's always that possibility of screwing up.

I am here to help, and will do the best I can over the net to give you plentiful information. You need to know your engine, believe me, its the best thing you can do. If you're like me, and you don't like spending 80 bucks on a guy to tell you the obvious things like your sensor is bad or whatever, then you will use the resources available to you and get cracking onto business. Again, if you have any questions, I'll help you to the best of my knowledge

 

well someone can start by please telling me how to remove the os sendor, i figured out how to remove the h2 senor it self but the 2 pigtail wires coming out of it leads into a buntch of wires. do i need to cut em and replace new one by spliceing into them?

 

First, we should try to get our semantics straight so that we're all sure we're talking about the same thing.

A "44" error code is for a lean indication from the Oxygen Sensor (O² Sensor). I'm hot sure what an "h2 sensor" might be.

The oxygen sensor is located in the left (driver's side) exhaust pipe:



There should be a single wire connector in the lead from this sensor. It should be connected to a mating connector. Disconnect the two. The replacement oxygen sensor should have the correct lead length and connector already installed. If not, you have the wrong replacement part.

Remove the old sensor, clean the area round the mounting, and apply a layer of antiseize compound to the threads of the replacement sensor. Be careful to keep the compound off the sensor tip, applying it only to the threads. Install the new sensor and tighten it to about 15 ft/lb. Plug in the connector, pick up your tools and equipment, and start the engine.

 

ill do that today , thx for the great details!