93 Chevy Cavalier Z24 3.1 liter
Has low rpm and power, raw fuel smell, no check engine light. Replaced plugs, wires, coil
packs, new cat converter, new fuel pump and filter . Checked for codes found MAP
sensor and IAC valve, both replaced. Still has low rpm and power still no check engine
light but still has trouble code for IAC valve.
stuck injector, misfire, or coolant thermostat broken are usual causes of the raw gas smell.
A stuck or leaking injector would leak fuel into the cyl.head......no smell, there is no F..in way the thermostat could cause a smell either. An external fuel leak,however would cause low fuel pressure at the injectors....low power and fuel smell the injectors require 50 PSI, and the fuel lines are not monitored by the PCM, trouble codes low presure will also cause poor idle, and evidently you have a circuit problem to the IAC
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