My computer generated a number 35 code with the flashing "Check Engine Soon". This indicated a bad Idle Air Control circuit, valve, and/or sensor. The only thing that happened, which started this, is I idled low once and my engine stalled. It took 2-3 times cranking to start it, but once it started again, it ran fine. I only worry because the "Check Engine Soon" light stays on, and the same code remains #35. Should I ignore this? Should I replace the sensor and/or valve? Should I clean the sensor and/or valve? Looking for anybody that has had this problem and resolved it.

Code 35 is for an Idle speed error.... if the ECM sees that the idle speed is 150 rpm higher or lower than commanded, the SES light will come on.
Check for vacum leaks and for the correct pcv valve (wrong pcv could cause idle problems)
The IAC valve could be sticking.

Thanks. I replaced the IAC Valve, disconnected from my battery terminal in hopes to reset computer, and everything is looking GREAT!!

At 115,000 miles and going strong again! The old IAC Valve looked HORRIBLE!

Hi you all, I'm new to this site. My sister has a '95 S-10 Blazer and seems to have a similar stall problem and 2-3 times cranking to start it but no CE light. Question is which one is the IAC valve?. I don't have Haynes or Owners manual, does anyone has a picture showing the IAC?. Thanks.

Thanks mcdanida but excuse my ignorance, I don't see the picture !

Trying again. HTML sucks in here.

This should answer any of your ??

Model 700 Throttle Body Injection (TBI) unit
1. Air Filter Gasket
2. Flange Gasket
3. Fuel Meter Assembly
4. Fuel Meter Body Screw
5. Fuel Meter Body-To-Throttle Body Gasket
6. Injector Retainer Screw
7. Injector Retainer
8. Fuel Injector
9. O-Ring - Fuel Injector Upper
10. O-Ring - Fuel Injector Lower
11. Injector Filter
12. Pressure Regulator Cover Assembly
13. Pressure Regulator Attaching Screw
14. Pressure Regulator Spring Seat
15. Pressure Regulator Spring
16. Pressure Regulator Diaphragm
17. Fuel Inlet Nut
18. Fuel Nut Seal
19. Fuel Outlet Nut
20. Throttle Body Assembly
21. Idle Stop Screw Plug
22. Idle Stop Screw
23. Idle Stop Screw Spring
24. Throttle Position Sensor
25. Tps Attaching Screw
26. Idle Air Control (IAC) Valve
27. IAC Valve Attaching Screw
28. IAC Valve O-Ring
29. Tube Manifold Assembly
30. Manifold Attaching Screw
31. Tube Manifold Gasket

Sorry, try this location for picture - these forums are not HTML friendly

http://www.s10forum.com/forum/attachment.php?s=&postid=264916

Got it! Thanks a lot mcdanida, I'll check it out tonight and find out, I might be lucky.