Question about 1994 GMC Sierra

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Electric fuel injector floods out engine - 1994 GMC Sierra

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  • Mike Jan 13, 2013

    changed out the computer Battery diconnected while it was being changed

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There is only one way why it will flood, and that is if the injectors are on/open all the time. He is a trick, disconnect the positive side of the battery terminal for 5 minutes and then connect the terminal and try again. If it dose not work then you may need to update the ECM on board computer. I hope you have not been boosting other cars with your truck?

Posted on Jan 08, 2013

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I have a99 Quattro a4 2.8 I just put a motor in it. it has good spark and is getting fuel.very time u try to start it. it floods the cylinder and cranks over hard remove fuel pump fuse turns over fine


Sounds like you have either a shorted fuel pump driver ground or a sticking fuel injector or injectors. Remove the injector electrical plugs and see if it still flood if it does then then one or more injectors are defective, if not then the engine wiring harness is grounded to one or more injectors or the PCM (powertrain control module) is defective. Remove the spark plugs to ID which cylinder is defective, disable the ignition system when you do this or the gas squirting out the spark plug hole can ignite (been there)

Oct 10, 2016 | 1999 Audi A4

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The car is flooding and will not start fouling the plugs replaced coil pack spark plugs and wires also replaced some sensors it still floods and will not start my name is Lawson Cambron


If the engine is flooding the cylinders, you more than likely have a fuel problem, not an electrical problem. You didn't say what kind of car you have or the year, which also matters very much. Are all cylinders flooding or only one? If 1, you have a bad fuel injector, or if it's an older car with a carburetor, the float is sticking inside the carburetor. You may even have a bad fuel pressure regulator. I would imagine the only way it could be electrical is if there's a problem with the computer itself.

Sep 02, 2015 | Cars & Trucks

2 Answers

Injector sprays too much fuel after starting. Engine floods out


Suspect (potentially) either a stuck injector, or a failed/failing fuel pressure regulator. One sign of a failed fuel pressure regulator can be gas in the oil. (I suffered that side effect, along with bogging, and black smoke rich running, worsening as warmed up, turned out to be fuel pressure regulator). If the injector is loose in the throttle body, or has bad o-rings, can also cause some wonky behavior. Good luck.

Mar 14, 2015 | 1992 Geo Tracker

1 Answer

1986 throttle body injector floods cylinders when key on. nissan 720 pickup


Maybe the injector is shorted out. At any rate it sounds like it is stuck open. You can do an ohm test of the injector, check it's resistance, but I don't know the value you need to look for on this. Just to give you a range to look for, a Chrysler injector's resistance should be 12-15 ohms. Yours should show low resistance as well. If it's open (no value at all) or if the resistance is very high (high ohms reading), it is bad.

In reference to the last statement in your post, no signal will keep it from flooding. An injector is a solenoid and normally closed. The only way to open them is to complete the circuit across their terminals. As long as the key is on, the injector will have a steady 12 volt current available to the injector on the power side. To pulse them or cause them to open, the ecu will ground the circuit for a split second, energizing the solenoid, and causing it to raise the pintle on the injector for fuel to spray out. The ecu will just keep on its merry way, pulsing the injector over and over, never realising the engine is flooded. If it's flooding with the injector connector disconnected, the injector must be stuck open.
Hope this helps you solve it. Good luck.

Jun 24, 2012 | 1986 Nissan Pickup 4WD 1986

1 Answer

Car floods and starts hard when first started


ENGINE FLOODING COULD BE CAUSED BY FAULTY FUEL PRESSURE REGULATOR.FAULTY MAP SENSOR, WEAK IGNITION SPARK.DIRTY FUEL INJECTORS LEAKINGSTICKING OPEN. FLOODING OUT ENGINE.CLEAN THE FUEL INJECTORS AND CHANGE AIR FILTER.

May 24, 2011 | 1990 Buick Century

1 Answer

1989 mpv mazda does not start on cold mornings and days


I'm assuming the engine cranks with the starter but does not start and run.

check the operation of the cold start injector. This is a separate fuel injector that injects fuel into the intake manifold to help richen up the mixture for cold starts. It operates on a timer that is linked to a sensor that measures engine coolant temperature. Once warm or the timer runs out, the cold start injector is turned off. Other things to check:

Fuel pressure too high (floods engine through cold start injector), engine coolant temp sensor or intake air temp sensor is stuck at full hot (doesn't allow enough fuel for cold starts), fuel injectors are leaking (floods engine with fuel).

Feb 10, 2011 | 1989 Mazda MPV

1 Answer

Cranks fine engine runs fine but you turn off. it is hard to crank keeps turning over finally cranks


CLEAN FUEL INJECTORS.THEY ARE FLOODING THE ENGINE.WHEN YOU TURN OFF ENGINE DIRTY CLOGGED FUEL INJECTORS WILL KEEP LEAKING FUEL FLOODING ENGINE.ALSO REPLACE AIR FILTER.

Oct 25, 2010 | 1995 GMC Yukon

1 Answer

I have a 99 olds alero. I can drive awhile park the car try to start it and it won't crank. Newer battery and alternator. Mechanic is thinking manifold sensor. plz help


IF CAR TURN OVER NOT CRANKING AFTER A SHORT DRIVE WHEN ENGINE HOT.DIRTY CLOGGED FUEL INJECTORS FLOODING ENGINE OUT.CLEAN FUEL INJECTORS.FILL GAS TANK UP.PUT A CAN OF SEAFOAM IN FUEL TANK.DRIVE CAR AROUND TO HELP FLUSH OUT CARBON ON THE INJECTORS SEATS TO STOP GAS DRIPPING CAUSING FLOODING.IF CAR WONT TURN OVER.BAD BATTERY CABLES OR STARTER.SCAN IT FOR THEFT SECURITY PROBLEMS. IF STARTER TURNS OVER NO CRANK ENGINE FLOODING DUE TO DIRTY FUEL INJECTORS.

Sep 26, 2010 | 1999 Oldsmobile Alero

1 Answer

My 1987 wont start a second time after warming up.


FLOODING IS WHAT HAPPENING.CLOGGED OR DIRTY FUEL INJECTORS. IS LEAKING WITH ENGINE OFF.FILL FUEL TANK.PUT A BOTTLE OF FUEL INJECTOR CLEANER IN FUEL TANK.DRIVE AROUND SO THE FUEL INJECTOR CLEANER CAN CLEAN FUEL INJECTORS.

Sep 13, 2009 | 1987 Ford Mustang

1 Answer

Mazda mx5 floods on starting


check fuel pressure regulator, is return line blocked?

Jan 06, 2009 | 1990 Mazda MX-5

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