CEL code

[garyn]

I ran the diagnostic test. I got 3 long blinks and 4 short blinks. Does anyone know what this means? '91,c/t headers

 

[Briank]

You may have to try again there is no code 34

 

[garyn]

Thanks Brian, I ran the code again. This time the cel light blinked 4 long and then 4 short blinks, then 2 short blinks. The symptoms are poor acceleration and erratic idle. I hope this has a listed code.

 

[Briank]

That sounds better 2 is rear O2 sensor and 44 is rear fuel supply. Could be bad spark plug or coil, bad fuel injector. Have you done any recent work on the rear bank?

 

[garyn]

Thanks again Brian. Yes, I just changed both o2 sensors last week. Previously, I changed the middle coil and spark plug on the rear bank. Apparently, water had gotten into that coil and cracked the porcelin on the spark plug. The coil looked bad so I had it changed. The silver covers were reversed and may have let water in. I've corrected that problem hopefully.

 

[Larry Bastanza]

Confirm which light is blinking. Is it the ABS or TCS light, or is it the Check Engine light? 44 on the ABS or TCS is a wheel speed sensor.

HTH,
LarryB

 

[garyn]

The tcs light blinked 3 long and 4 short.

 

[Larry Bastanza]

If that is the ONLY light on? If it is it means the VREF reference voltage is abnormal. That would be the ECU, wiring, or the TCS control unit.

Tell me what CEL, ABS, and TCS ligths are doing.

HTH,
LarryB

 

[garyn]

CEL blinks 4 long and 4 short. I went ahead and checked the other 2 coils on the rear bank. There was a brown rust color corrosion on the coils due to water accumulation inside the column where the spark plug goes(coil covers were reversed with the gasket on the bottom) I blew the water out with air and let dry overnight. I checked the plugs and they had some rust discoloration. The tips were black,running rich I guess due to a faulty o2 sensor which I have just changed. I changed all 3 spark plugs. Hopefully this will fix my poor acceleration problem.