kiko11

This is a great forum. I have a '93 S10 Blazer 4.3L with a VIN "W" code 4L60-E 4X4. I could use some help with Code 35. The Check Engine light goes on only after a short time sitting at a stop light or in traffic. The light goes out after moving down the road a short distance. I have replaced the IAC, cleaned the area for the pintil, replaced the PCM, cleaned the LEGR, replaced the ignition wires, gapped the new plugs to .045", replaced the rotor button and cap. Temporaly plugged the small vacuum line the vacuum line to the brake booster. No change. I would be most grateful for a solution. The vehicle only has 112K miles. Hardly broke in. The body is perfect inside and out. The high idle problem is approximately 750 to 800 rpm with and without the A/C engaged. The high idle is suspect. However, not sure if this is really setting the Code 35. The A/C clutch cycles from the I/P. Aside from this the whole truck runs very well. I have missed something.. I can sure use some help. Thank you Dave

maxwedge

The pcm does not see the expected idle value for the iac counts, code 35, vacuum leaks can cause this, dirty throttle body and/or iac passages another possibility.

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