well its been going on for a while, myself noticing power loss, just before xmas i was getting code 43, the other day it wouldnt start, i got it started but now it feels like its not getting gas, so i took the air cleaner off, looked at the inectors, and they are kind of dripping, in a sence, i am now instead of 43, getting 15, my fuel filter has not been changed in years prolly like 8, could that be a problem?

 

Trent,

The '15' is for a low temperature (open circuit) fault of the CTS. Make sure the Coolant Temperature Sensor is connected. Test the sensor with an ohmmeter to make sure there is some resistance (NOT infinite resistance).

The '43' is for a TPS adjustment or ESC problem depending on the year of your car. Make sure the throttle position sensor is adjusted to 0.54VDC at the idle position. Bypass the ESC if the error code persists, at least until you have resolved the fuel problem.

Your dripping injectors are certainly not good. Changing the fuel filter is a good idea, but it may not help the situation now. You still need to change it, however, since low fuel pressure can be part of your problem (more on that later).

It's possible the injectors are damaged, or just dirty. Try cleaning them in place with a spray cleaner while the engine is off. Allow the cleaner to soak, then spray intermittently to help break up any deposits. You might even want to remove them for inspection and cleaning. While you're at it, make sure to clean the idle air passages.

If cleaning doesn't help, don't even think of replacing the injectors before testing the fuel pressure. Low fuel pressure in a TBI system can have some strange effects. With low pressure, cold starting is difficult or impossible, since the fuel pressure is too low to provide adequate fuel while the ECM is in the open loop mode and using default fuel tables. If you do get it to run, when the engine warms it will often run rich, not lean, since the ECM will attempt to correct fuel to satisfy the oxygen sensor. The ECM will add fuel in stepped increments until it is nearly at maximum. This will dribble enough fuel at warm idle and part throttle to atomize and keep the engine running, with the excess fuel wetting the inside of the throttle body and intake. When the throttle is opened farther the fuel pulses will be too wide, since the increased intake air flow will atomize all the fuel more effectively. In addition, the excess fuel that collected in the intake will be swept into the cylinders as well, further enriching the mixture. The ECM will compensate and lean the mixture, but will return to excess fuel as soon as part throttle or idle is used.

For reference, the fuel pressure should be at 11-13 PSIG at idle.

In the future, it would be helpful to list the car's year and engine type for clarity, including any modifications you may have done. Good luck.

 

What about fouled spark plugs,my car had some similar problems.The car would barely start and when it did the dang thing would run ruff as he!!.But new plugs changed that.

 

the info on the car is in my sig
im goin to try cleaning the injectors tomarrow, see if that helps