I started this as an O2 sensor question that was answered by Joe. I thought I'd put this out there again to see if anyone has any suggestions.
JacobandNickolas; My problem is still high HC at idle RPM's (710). Passes the Catalyst, Excessive Smoke, PVC, Fuel Evaporative Controls, EGR, Fuel Inlet Restrictor, Gas Cap test Result, and high RPM's (2563) I've replaced about everything, and it keeps getting worse. I've replaced TPS, ICS, EGR solenoid, air filter, distributor, cap, rotor, wires, spark plugs, coil, set timing to 0 with spark wire unplugged. Rebuilt TBI and had injectors serviced replaced vacuum lines can't find any leaks replaced O2 non-heated sensor. (May have done a couple of others but can't recall right now) just remembered did PVC and replaced gas cap, vacuum reads at 17 inHg vac. I've done 3 tests at idle they started at 302 replaced things then went to 404 replaced to where I am now and today, they measured 532 the max is 220 the high rpms went up then down but are way under the 220 limits at 102. Not showing any error codes, I've been working on vehicles for a long time and have run out of things to try. Just rebuilt lower end new rings, bearings, etcetera replaced thermostat when put back together. The truck is running fine, no misfires, starts right up, no misses through gears while driving, could spin out if I could afford the tires. The mechanic at the emissions said the truck was running great. Any help or suggestions would be greatly appreciated. Mike D.
Tuesday, October 25th, 2022 AT 2:54 PM
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