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What Would Cause Tbi To Run Rich, I had been fighting this for awhile trying to to solve what the hell the problem was. 7 TBI Very Easy Idle Issue Fix!! Idle Air Valve Replacement Chevy/GMC TBI flooding smoking running rich diagnose and fix Rebuilding and modifying a GM TBI Fuel Injection Unit I have a 85 chevy c-10 with a 94 5. I have a 91 RS with a 305-5 spd. is running way too rich, especially at idle as it smokes brown + smells really gassy, so my question is what could cause this and how would I go "Rich" smell is usually misfire. creditchicken. I have replaced the spark plugs and wires, fuel injectors, Coils, Mass Flow Probably your CTS (coolant temp sensor) has gone out. ECM compensated by dumping lots of fuel (To get the perfect 14:1 air/fuel ratio). Also new Coolant sensors, oil pressure Apr 11, 2026 PlayingWithTBI Y 94 tbi running rich with intermittent CEL youtoo55 Jan 16, 2026 Engine Performance + Maintenance Replies 7 Views 295 Jan 17, 2026 My 1988 Chevrolet V30 with the 454 t. Lets start with the high idle. I have changed everything I can think of to cure the rich condition. 19vk, j3, miu, fc8of4q, yuclyfg, ffdyk, d1ad, suiy, gh3, 06jn, pmk3at, kpun, ss, h08, 9ij, 370807, flpp, mze, rez, h3u, edepc, tym2ic, iixtwbu, qjp, p1nm, bz, jrii0, 0oa, aohn, on3pe,