I have a 98 Blazer that has plagued me for months on end. I installed a new fuel pump, dist cap, rotor, wires, plugs, crank sensor, coil, ignition module, swapped the MAP, cleaned the MAF, new filters, checked just about everything and on hot sunny days especially when stuck in traffic, it stalls and won't restart until it cools.
I can drive it all night,and on cool days and it will run like a top!!!
I have not replaced the 02's yet, nor the crank sensor. I did break off the coolant temp sensor and JB welded it back on and the gauge reads fine. When it stalls it acts like it's too lean and starves out.
I have gotten a few P0171's and another lean condition on the 02's, but I'm ready to rip off the hood so it will let the heat out of the hood compartment!!! PLS Help!