Having problems with your 1992 GMC Sierra K1500 ?
92 gmc 1500 4x4 when at operating temp starts poping threw tbi i have chaned wires,cap,rotor,ign mod,coil,temp sensor,idle air controll valve oxygen sensor.
Could be a burnt valve
Your egr.valve may not be functioning good chanse its got carbon build up, or there is no vacume to it, remove it and clean it with carb cleaner, both the valve and the intake.
Repair Help & Product Troubleshooting for 1992 GMC Sierra K1500
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