Hello All

I've been waiting for a GM ,TBI to come in so I could grab a waveform. Luckily this one came in for an emission test. Which it passed with flying colors.

Vehicle: 92 Blazer 4.3 Vin Z , 97,000 miles

Idle test

HC...... 6 ppm

CO...... 0.01 % ... Login to read more.