Hey Ide appreciate some input. I have a 91 Camaro 305 TBI with 112,000 miles on the engine. It seemed to be running smoothly until just recently. A Service Engine Soon light will come on briefly then dissapear during random points when I drive. The problem is a humming/buzzing noise coming the front left of the car (assuming Im in the drivers seat). I can hear this noise only from inside the cabin. When I pop the hood, it seems to get drowned out by the overall belt noise. I assumed it was power steering and filled it. It is not. I am only hearing this noise when the temperature reaches roughly 220. This sound is not my electric fan for starters.

I concluded that it may be these things:

-Power steering, even though I filled it. Could it be more involved?

-My alternator. It seems to be making a noise when I pop the hood (but not similar to what I hear from inside )

-Some sort of pump or spinning object from this region

Please help me, something bad is going to happen soon and Ill be stranded.

 

since the check engine light came on, what code is the car giving you?

 

I have no idea, but I got it smogged two weeks ago and it passed. He said hed run the comp on it and he said everything looked okay.

 

check your error codes.

 

I cant run the codes, I dont have a machine. Im looking for ideas.

 

uh you don't need a machine to run codes....you just need a paper clip, you jump 2 pins on the diognostic port (I don't have my manual, and it's been years since I did mine) I'm not quite sure which ones...someone on hear will know, and you turn the ignition on, NOT TO START, and the check engine will flash...1 time than a pause and than 2 times than a pause....code 12-no distributor pulse...it says the diognostic sys. works and the car is not running... than you will get the accual codes telling you what's wrong, than it will repeat, that's all there is to it

 

I dont do that kind of stuff. Im looking for what the sound could be, from my description. Heeeelpppp.

 

does the noise change pitch when you move the steering wheel back and forth?, you may hyave got air in the power steering sys, and you'll have to blead it out, I don't have my manual with me(I'm in korea) but I belive it has you jack the front of the car up and go from lock to lock with the front wheels with the engine running, not really that hard, just make sure you have some extra fluid with you it sucks that stuff down real fast

 

Honestly, can you bend a paper clip and count? Then you can check your error codes. We're only trying to help and you insist that we can help you without any kind of raw data.

No offense, but people like you are going to keep people like me in business as soon as I get a shop job.

THE CONNECTOR


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| 1 2 3 4 5 6 |
| 7 8 9 10 11 12 |
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DISPLAYING THE TROUBLE CODES
Run a wire/hairpin from Pin 6 to Pin 12 with the ignition off (although on later cars it should be from Pin 5 to Pin 6), then turning the ignition to the on position without starting the engine will flash the "Service Engine Soon" light in the following sequence: flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause Following this "12" code repeating three times will come any trouble codes stored, flashing each of them three times. If you do not see the "12" flash three times, your diagnostic circuit is defective.
Some vehicles will display stored trouble codes, then "12" again, followed by energizing "most system controlled relays." The fuel pump relay will not energize. The idle air control valve will fully extend to enable checking minimum idle speed.

CLEARING THE TROUBLE CODES
Turn the keyswitch to the off position. To clear any trouble codes, disconnect the power feed for 30 seconds. If this is done at the battery, and your car stereo is equipped and programmed with a four digit pin code, you may have to re-enter that as well to use your stereo again. A better place to remove power is at the fuse.

TROUBLE CODES


12. No reference pulses to Electronic Control Module (ECM).
13. Oxygen sensor signal stays lean during warm engine cruise
14. High temperature indicated at engine coolant temp. sensor
15. Low temperature indicated at engine coolant temp. sensor
16. High battery voltage OR
Direct inition system open or shorted to ground
17. RPM signal problem
18-20. N/A
21. High voltage at throttle positon sensor
22. Low voltage at throttle positon sensor OR
Fuel cutoff relay circuit open or shorted to ground
23. Low temperature at manifold air temperature sensor OR
Throttle position sensor error
24. Circuit fault in vehicle speed sensor
25. High temperature at manifold air temperature sensor OR
Vacuum switching valve circuit open or shorted to ground OR
High voltage at ATS sensor
26. Fault in quad driver module
27. Fault in 2nd gear switch
28. Fault in 3rd gear switch
29. Fault in 4th gear switch
30. N/A
31. Low voltage at manifold absolute pressure sensor OR
Fuel injector OR
Park or neutral switch OR
CAM diagnostic OR
Governor malfunction OR
Wastegate overboost OR
Wastegate eletrical signal open or shorted to ground
32. Fault in barometric pressure sensor circuit OR
Fault in exhaust gas recirculation valve diagnostic switch OR
Fault in electronic vacuum regulator valve
33. High voltage (low vacuum) at mass air flow sensor (or MAP sensor)
34. Low voltage (high vacuum) at mass air flow sensor (or MAP sensor)
35. Idle speed can not be set to desired RPM
36. Burn off at mass air flow sensor OR
Problem in transmission shift OR
Fault in direct ignition system OR
Missing pulses in electronic spark timing signal
37. N/A
38. Fault in torque converter clutch brake switch
39. Fault in torque converter clutch circuit
40. N/A
41. Fault at cam sensor OR
Cylinder select error OR
Tach input error
42. Fault at electronic spark timing circuit OR
Fault at direct ignition system OR
Fault at fuel cutoff relay circuit
43. Low voltage at electronic spark timing circuit
44. Oxygen sensor lean
45. Oxygen sensor rich
46. Fault at vehicle anti-theft sytem OR
Fault at power steering switch
47. Problem at Electronic Control Module (ECM)
48. Misfire
49. Vacuum leak
50. N/A
51. PROM error
52. Problem at Electronic Control Module (ECM) -
Missing fuel calpac missing OR
Analog to digital converter error OR
Fault at quad driver module OR
Low voltage at oil temperature sensor
53. High voltage at battery OR
High voltage at exhaust gas recirculation valve OR
Voltage reference error OR
Problem at vehicle anti-theft system
54. Low voltage at fuel pump OR
Low voltage at Fuel pump relay OR
Output failure at quad driver module
55. Problem at Electronic Control Module (ECM) -
ECM failure OR
Serial bus error OR
Fuel lean malfunction
56. Low coolant or corrosivity OR
Fault in port throttle system vacuum sensor
57. N/A
58. Problem at vehicle anti-theft system
59-60. N/A
61. Oxygen sensor degraded OR
Port throttle system error OR
Cruise control problems
62. Gear switch input diagnostics OR
High voltage at oil temperature sensor OR
Fault in cruise control- vacuum solenoid circuit
63. High voltage at manifold absolute pressure sensor OR
Fault in exhaust gas recirculation valve OR
Fault at right oxygen sensor
64. Low voltage at manifold absolute pressure sensor OR
Fault in exhaust gas recirculation valve OR
Right oxygen sensor lean
65. Failure at exhaust gas recirculation valve OR
Faulure at injector peak/hold diagnostic OR
Right oxygen sensor rich OR
Fault at cruise control position sensor
66. Internal reset of Electronic Control Module (ECM)
67. Fault at cruise control switch
68. Fault at cruise control switch
69. Fault at air conditioner pressure switch
70-87. N/A
88. Internal reset of Electronic Control Module (ECM)

 

I know Token. Im not good with cars okay, thats why Im here. Good luck with the shop. But its the alternator, its making the humming noise. Im not if I should get a new one, or wait until this one dies completely. I might have to replace it. The cars running though ha.