Question about 1984 Cadillac DeVille

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INJECTORS ARE FLOODING MOTOR AND PLUGS

WILL NOT CRANK UP BECAUSE OF TO MUCH FUEL. HAVE CHANGED MAP SENSOR AND COMPUTOR

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  • kevinsautore Apr 20, 2009

    replacing the fuel pump relay did not make any difference.

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Is the fuel pump relay switching off the fuel pump? When you turn the key to the on position, do you hear a click and the pump shut off? If not, the relay is bad and needs replaced. If pump keeps running it will flood engine.

Posted on Apr 20, 2009

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3 Answers

The throttle body injector goes full on and floods the engine as soon as it starts.


This vehicle has no mass air flow sensor , it uses a MAP sensor for speed density fuel control , My self I would hook up a scan tool an see what the block learn an integrator or showing , this is same as fuel trims on OBD2 vehicles I would also look at the map sensor voltage parameter ! A bad map sensor can cause a lot of fuel to dump into the engine ! Manifold Absolute Pressure MAP Sensors

Apr 19, 2015 | 1992 Geo Metro

1 Answer

When the outside temp is below 30 degrees my 1994 jeep grand cherokee 4.0 will not start


lots of guesses. sure.. common here.
first would be a real tuneup , using the 60,000 mile list. for sure.
filters and spark parts. (my guess is you did)
1994 is a great year, all 93+ jeeps are good from 93 to now.
I presume this is USA car, and you scan it and there are no
DTC errors.????
seems its flooding ,
if 5% throttle makes it start, that is lack of air or flooding
if wont start and the super secret WOT crankings clear flood , then was flooded, Wide open throttle cranking , cuts all fuel (the secret)
so is , IAC/ISC stuck closed, chean it yet.
or injector leaks (pass the injector leak down test ,does it?0

got 500k miles o jeeps from 88 to 99+
and the ISC stick on them all.

the ISC is the electric, ldle speed control valve.
if it sticks closed, you cant get full air supply to start.
had to clean mine every 10 to 20k, miles.
until i found the magic, spray that cured that.
"klondike gun lube spray": looks like teflon after it dries.

that run rough started is called misfire.
and is flooding, (if injector are not leaking) its air supply wrong.
one more thing,
the ECT must read 30F when parked overnight, and was 30f.
see? a cold engine will be near ambient air, first thing, in the morning.

running old fueL:?
running summer fuel from last August?
the ECT sensor causes injections to match true temps.
make sure it reads right for all bets off.

clean ISC first. not shot gun parts
for that cash you could have got a nice scan tool.
like this.

http://www.walmart.com/ip/Equus-3140-Innova-Diagnostic-Code-Scanner/14644660

the prefect tool for 93-95 jeeps. does OBD1 on JEEPS !!!!

Mar 03, 2015 | 1994 Jeep Grand Cherokee

1 Answer

Suzuki Aerio 2004, will crank over floods out tho. Changed Plugs and Boots. New baterry too. Can smell gas @ Tail pipe. Wants to fire-but just won't catch. Where do I start looking for the answers.?


what engine? 2.3 or 2.5L?
all cylinders flooding??? spark tips on ALL dripping in gas?
check spark at all spark plugs ( ALL not just ONE)
if spark is good.
this engine is chain cam, so it makes huge noise before death.
did it?, nah
ok, so connect any $9 scan tool, and scan it. (barrow /rent.?)

you crank it for 5 seconds, not less.
and as you crank the scan tool RPM shows 250 to300 rpm and fails to start, the RPM on the tool shows you that the crank sensor is working
now release the key and do not turn off
look for DTC errors. got P0340,355? or any other DTC
that decodes to bad CMP or CKP/
yes, BINGO, the scan tool told you why spark is dead, or way off
timing,

the PCM will report Cmp or CKP errors even 1 in 6 pulses.
the PCM runs monitors against these 2 full time. and will see it fail.
and report, it, let it tell why spark is bad.
say spark is good. and still floods.
1: engine compresssion over 150psi? W.O.T?
2: flooding , i pull the fuel pump relay and crank now.
starts and runs for 3 -5 seconds, yes, that is the flood clearing
so i then try test fuel, runs perfect now (no fuel pump) ???
runs for 3 second, each test fuel usage. well good motor, good spark.
what more do you want? sure to run
so you have either insane high fuel pressure. or injectors leaking
can and does happen.
the tests are all in the FSM under injector and pump testing.
i check fuel pressure first. as its a mandatory thing.....
to factory spec. for unsaid engine.
then i do a injector leak down and balance check.
ask if you get this far.....????


Jan 24, 2014 | 2004 Suzuki Aerio

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

2 Answers

MY TRUCK CRANKS BUT WONT START , AFTER A CAUPLE OF TIMES , THAT HAPENS EVARY SO OFTEN. CANT YOU PLS HELP ME


CHANGE FUEL FILTER CLEAN FUEL INJECTORS.MOST OF THE TIME IF FUEL INJECTORS DIRTY WHEN YOU TURN OFF IGNITION FUEL INJECTORS WILL DRIP FUEL FLOODING ENGINE MAKING HARD TO START.POUR BOTTLE SEAFOAM TO A FULL TANK OF GAS.IF CRANKING TIME TAKES 2 TO 3 TIMES. HAVE CAMSHAFT SENSOR AND CRANKSHAFT SENSOR CHECKED WITH A SCANNER.

Jan 09, 2011 | 1999 Chevrolet Silverado 1500

2 Answers

Replaced motor in 96 sunfire car will not run. Acts like it is flooding out. Have got it to run a few times. Changed map sensor, coil pack, fuel pressure sensor, injectors, crank position sensor, pretty...


Did the old motor run? Is this a used motor? Did you hear this motor run before you installed it? Have you tried running it with the exhaust unbolted from the manifold?

Nov 10, 2010 | 1996 Pontiac Sunfire

1 Answer

Have a 1999 dodge dakota sport 4 wheel drive with a 5.2 liter motor 158,000 miles my problem is every 3 or 4 days when i go to start it it in the morning will not start after about 5 or 6 times cranking...


a vehicles crank shaft sensor sends a signal to computer, as to tell what revolution the crank is on. you may not get a check engine light. check injectors for leaking in to cylinders, it can cause an excess amount of fuel in cylinder. this may be causeing the no starts and flooding smell. if it starts good warm then check the injectors for leaking. good-luck!! you may also have a bad coolant tempurature sensor. symtoms of a bad cts are--poor cold idle, stalling, slow idle speed, cold hesitation or stumble, poor fuel milage. ( will also ****** timing). its hard to say with out being there, so check out above. good- luck!!

Oct 26, 2010 | 1999 Dodge Dakota

2 Answers

1990 chevy blazer 350 ci throttle body fuel injected . the motor is flooding out u can see the injectors keep dumping fuel into the throttle body


Sounds like you have an injector leaking. Have someone just cycle the key on and off to run the fuel pump but don't crank the engine. If you see fuel dripping from the injectors, unbolt the injector cover on the throttle body, remove the injectors and replace the orings around the injectors.

Jul 22, 2010 | 1991 Chevrolet C1500

2 Answers

I have a problem with my truck starting, chevy 1990 throttle body type 2 top injectors. It takes several cranks to start if it even starts at all without flooding the engine. _ having this problem before I...


I had the same problem with my 1990 chevy 1500 (350) replaced the plugs and wires no luck. I replaced the fuel pressure regulator, still no luck. So i called my mechanic he said it would either be the map sensore or the coolant temp sensor. I didnt figure the coolant temp sensor would cause my truck to flood but it was a 17 dollar part so i gave it a shot, took 10 seconds to switch it out with a 19mil deep socket. Truck fired up and ran like a top no more flooding. =)

Jun 23, 2009 | 1990 Chevrolet C1500

1 Answer

Vehicle runs rough and seems to be flooded


Assuming it has a 3.1 V-6, it could be any # of failures. Bad plug wires, ignition coils, control module (under coil packs), crankshaft position sensor, map sensor, throttle position sensor, egr valve, fuel pressure regulator, fuel injectors, engine coolant temperature sensor, vacuum leaks; have it scanned for trouble codes to help in diagnosing! If you think it is just over fueling (flooding),look at fuel pressure regulator or coolant temp sensor ( when they fail the computer thinks its always -40 F causing it to over fuel). A bad map sensor can cause the same. Hope this helps. Thanks in advance for rating me!

Jan 22, 2009 | 1993 Oldsmobile Cutlass Supreme

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