Question about 1994 Chevrolet C1500

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Burned very rich, now will not start. check engine

Was running , very rich, now will not start. check engine light is on.

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Check oxygen sensor first and idle control valve second

Posted on Nov 15, 2009

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2 Answers

My check engine light and limited performance reading came on at same time, opened hood catalytic Converter red hot. What causes this problem


2 things come to mind. a plugged catalytic and the engine is running too rich and the convertor is trying to burn off the excess fuel.

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I have a 1996 GMC Jimmy that was iddling very rough and code said cylinder 2 misfire check engine light was on solid. Replaced all plugs, wires, cap and fuel filter 1st of March 2013. It ran better for a...


Lets start at the beginning. Did anyone check fuel pressure before and after replacing the pump ?
Has anyone checked the fuel pressure regulator and the injector spider ? The 4.3w engine uses a spider with one injector that supplies all 6 cylinders. And it runs at 65psi or more.

Aug 05, 2013 | 1996 GMC Jimmy

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My 1997 town car is burning to much fuel not leaking it but burning it i can smell the gas when driving it


It can be several things. The engine automatically sets to a RICH mode for cold starts. It will stay in RICH until a temperature sensor warms up. There are sometimes 2 sensors with one for the dash and the other for the engine controls.
Next would be a faulty fuel pressure regulator keeping the pressure too high. Or dirty fuel injectors failing to close properly.
Finally, air leaks in the intake manifold will make the O2 sensors dump fuel to restore the fuel ratio. Check with water spray bottle on intake seams while engine is running.

Apr 25, 2013 | 1997 Lincoln Town Car

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I am smelling fuel and it burns alot of gas.


Check for leaks, service engine lights since CTS (Coolant temp sensor) can cause the vehicle to run rich. Keep in mind that there is a lot of Ethenol in our gas that is lowing the gas mileage on our vehicles.The canister purge tank can cause gas smell if it isn't working right, but the computer should give you a service engine light on any of these.

Mar 28, 2011 | 1997 Ford Expedition

1 Answer

Using too much gas


I'd have the ECu check for computer faults. A strong possibility the o2 sensor has failed. The ECU will have the engine run rich to avoid overheat in a cylinder from running too lean (this is done to protect the engine, better to burn more fuel then to burn valves) Many auto parts stores will check the engine computer for no cost.

I hope this may have assisted you,
Tom

Jun 28, 2010 | 2004 Mitsubishi Montero

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1988 gmc 1500 Gas smell coming from tail pipes


sounds like it running to rich of a fuel mixture, the first thing i would do is replace the oxygen sensor and also make sure its not misfiring an any cylinder, start there, hope this helps.

Dec 26, 2009 | 1988 GMC C1500

2 Answers

Exhaust smoke at start up


It means that the system is running rich, in other words too much fuel.

Try checking your air filter--make sure it is not dirty. Also check for a plugged air intake hose. Enough air is not getting into your cylinders for the proper air-fuel ratio.

If it has carb, the carb float is too high or sunk.

Mar 27, 2009 | 1991 Ford F150

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