Question about 1991 Chevrolet Corsica

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Hard start. rough low idle, strong fuel smell when trying to star

Where is the MAF sensor located?

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In air filter housing between filter and engine if car has mulit-injectors 92 and later ) If car is 91 and early throttle body injector its on firewall about middle top and has vac-hose from it to rear of throttle body.

Posted on Jul 24, 2009

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The engine and transmission in this cars drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPEDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

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What the problem when my car is idle at a red light and if its idle for a while it kills what is the problem .u can smell when its about to kill it burns rich


Hello and welcome to FixYa!

I strongly suggest that you replace the MAF (mass air flow) sensor. If the MAF is faulty you'll have vacuum irregularities. Go for the oxygen sensor too. It controls the air and fuel mixture too, one good reason why you smell rich fuel burning.

Hope this helps and thank you for using FixYa! Have a good one!

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Hi and welcome to FIxYa!

If the engine is acting wild and experiencing a rough idle then the problem will be on the MAF sensor. If the MAF is faulty the engine acts unusual so I strongly suggest a MAF sensor replacement.

Hope this helps and thank you for using FixYa! Have a good one!

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2 Answers

Strong fuel smell


You more than probably have a gas leak somewhere in the fuel system. If you can smell gasoline, it is leaking somewhere. The lines run along the frame to the engine. The leak might be hard to see or hidden (on top of the fuel tank).

The leak is robbing fuel pressure from the engine, causing it to idle rough, so is probably on the pressure side of the system.

(Most fuel systems, except for "returnless" systems with Pulse width modulated fuel pumps (not very common), have a pressure line and a return line to the tank.

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