1992 CHEVROLET 4.3 1991 CHEVROLET 4.3 SOLVED BEFORE ANSWERED! ECT DEAD.

SOURCE: Chevrolet 2500 Not Running, May Be Fuel Filter Sensor

That red wire is only for the fuel heater.will not cause a no start.try pumping the primer pump on top of the fuel flter hsg. but first open the bleed screw,which is black plastic also located on the top.this will eliminate any trapped air that might have entered the fuel intake system.if the pump does not get firmer and harder to push, then you have a leak in the fuel supply lines or the ck valves in the fuel filter hsg or stuck open. Still no start have it scanned to ck fuel pressure while cranking.it should be close to 5000 lbs

SOURCE: Temp Sensor

The temp sensor known as the engine coolant temp. sensor tells the computer if the engine is overheating and so forth and tells the injectors how much fuel to give the engine. The temp. sending unit is what controls what your guage reads. It sounds like you need the temp. sending unit. It located near the thermostat housing with a single pole connector.

SOURCE: 1981 Chevrolet Corvette runs "rich"

Have you done an engine vacuum leak test with carby cleaner especially around injector seals.A leak will throw a lean signal to oxy sensor there by telling the computer it needs more fuel.Cant think of anything other than what you have already done.

SOURCE: 1991 chevy camaro 3.1

Mine had a similar problem, there is a wire that goes from the computer to the fuel rail and this wire sends info on how much fuel and when to inject the fuel... if that wire is grounding out then this will cause the lack of cylinders to fire and also explain the inconsistency. So i would start with the fuel rail..hope this is of some help

Dar

• 2007 Answers
• Posted on May 06, 2009

SOURCE: 1994 Chevy Cavalier runs rough with a bunch of codes

24 is speed sensor. Has no bering on a stationary car.
15 is the coolant sensor circuit. (which you already replaced)
66 is AC refridgerant.
19.... i have no idea.
From what you have described, i would almost have to say it's the idle control sensor, or intake manifold vacuum leaks. Make sur everything is tight, and wiggle all the hoses around to make sure none are cracked or loose. Use a length of fuel hose held to your ear, or a stethoscope if you have one, and listen and wiggle hoses with the engine running. If there are no leaks, go for the idle control sensor. If that doesn't do it, it'll be the mass air flow sensor. But usually when they act up, the car will start and die, start and die. Good luck.