Question about 1998 GMC Savana

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On low idle it floods gas to spark plugs causing low power back fire

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  • justicedeb Aug 23, 2008

    Mine is doing same thing. Today I reved it up and heard something click and it shut off. Will crank but not turn over, battery is dying now.

  • TwoByYou May 18, 2009

    While driving the engine just cuts out and and I am left stranded, I have had the fuel pump replaced but this did not resolve the problem.  The latest report is that it may be the MAP SENSOR.  Any help would be appreciated.

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  • 9 Answers

It may be the fuel injector poppet valves stuck, what year is it and what engine do you have?

Posted on Aug 31, 2008

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2 Answers

THE ENGINE WAS OVERHAUL AFTER THAT IT FAILING TO START JUST CRANKING BUT PROMISING ,THE SPARK IS THERE WHY PUTTING MORE FUEL ON THE PLUGS


Did you check for spark at more than one or two spark plugs? The spark is there, and the spark plugs are wet with gas? Is it flooded? Or is it getting too much gas? For a flooded engine, you know to open the intake valve wide open by holding the gas pedal to the floor, and cranking for up to 15 seconds? This will let a lot of air in and clear out most of the excess gas. Or have you tried this already?
Spark, gas, and compression: that is all that the cylinders need to run. In a well-timed engine, that is. A little gas/air mixture, then compression, then a spark is delivered and it runs. One of those three things is not right or missing for your engine not to start. Or you will have to recheck timing.

Jan 13, 2015 | Cars & Trucks

1 Answer

Truck is not firing on 3 cylinders yet it runs.. Runs really rough, back fires, under powered.. Plugs are Wet, Firing order is correct. New Spark plug cables. Don't know that is wrong! Please Help


Check for spark at the plug ( may have coil problem).
If spark is good then do a compression check. Pressure shouldn't be less than 75% of known good cylinders.

Apr 17, 2013 | 1995 Dodge Dakota

1 Answer

My 2000 nissan sentra misfires when gas is applied to the mix but idles well and runs well at low rpm's.what could be causing this problem


You probably have a weak spark plug or injector.
You should get a check engine light and if you have the computer scanned you should have a code telling you which cylinder is not firing.
The problem is there at idle but not as serious as when you put a load on the engine.

Jan 12, 2013 | 2000 Nissan Sentra

1 Answer

I'm getting an orange spark on my 1983 ford ranger, 2.3 4 cylinder. Replaced the coil, the distributor cap looks brand new. This truck is excessively flooding and when it does crank, it won't...


yes it could,, if you don't have the correct spark,, the firing would be weaker also, check the wires themselves to the plugs, and also the rotor , just because the cap looks brand new doesn't mean that its not arching inside the cap,, allowing the contact to get a reduced spark, if you replaced the coil, then its after that in the electrical circuit,, which brings you back to the cap, rotor, and wires. normally 3 wires won't go bad all at once unless there is a heat problem where the wires are routed, so I would just replace the cap and rotor, and see how it runs after that .

Oct 04, 2011 | 1983 Ford Ranger

2 Answers

Motor turns over but will not start, seems to be getting gas, & spark


I don't have enough info to give you a specific answer so I've listed a bunch of possible problem that could cause your engine to roll over but not start.
Check the battery and connections, a weak battery or bad connections can cause a weak spark and stop the engine from firing.
Fuel pump or fuel filter, low gas pressure can cause to lean of a air/fuel mixture for the engine to start.
Bad gas, old gas or water in the gas can stop the engine from firing.
Bad or fouled spark plugs, could be caused by bad gas.
Ignition wiring problems, can cause weak or unreliable spark.
Bad, poorly connected or misconnected spark plug wires. Even 2 wire out of order can stop the engine from firing.
Oily spark plug wires, can cause the spark to fire at the wrong cylinder or misfire.
Worn, damaged or wet ignition components.

Jun 08, 2010 | 1996 Jeep Grand Cherokee

2 Answers

The car will not start. the engine turns over but will not start i have spark and gas... 3.4L 1994 firebird


1.= HOW MUCH FUEL PRESSURE DO YOU HAVE?
YOU NEED AROUND 30 TO 45 LBS.
2.= MAKE SURE YOUR FUEL PRESSURE DOES NOT DROP RAPIDLY AFTER YOU SHUT YOUR KEY OFF.
IF IT DROPS REPLACE YOUR PRESSURE REGULATOR.
3.= YUOR PLUGS COULD BE FOULED TOO, IT HAPPENS.
IF YOU DO NOT HAVE ENOUGH FUEL PRESSUR THIS WILL CAUSE YOUR INJECTORS TO RUN RICH.

Dec 23, 2009 | 1994 Pontiac Firebird

2 Answers

Car idles low then dies.


For you to figure out if the spark plug fires, you need to pull it out one by one while running. Make sure that you are wearing protective gloves for this one. Normally for spark plug issues the idle will be sort of erratic and fells as if the revs is slow to go up when teh gas is stepped on. For the oil, check for leaks around the engine and smoke at the exhaust. Oil may enter the combustion chamber and burn causing a dark or bluish smoke. Also check the coolant in your radiator if oil gets in. For these problems you need to replace some oil seals and some oil ring. The low idle can be caused by faulty wiring since you have an EFI engine. Check the connections if they are loose. Also check the fast idle control valve if you can adjust the idle or it may need cleaning

Jul 07, 2009 | 1999 Mercury Cougar

2 Answers

1993 LEXUS ES300 FLOODING AND FUEL VAPOR OUT EXHAUST SYSTEM 1997 lexus ls400 is hard to crank.i have to turn it over 3-5 timesbefore it starts. it is getting fire and checked the plugs and are wet with...


ok, i tell you 3 possible causes.
check maf sensor connection , check fuel pressure regulator (max press fuel in rail 40 psi) , check engine compression (min 95 psi ) if less this cause spark plugs wet and not start

Apr 17, 2009 | 1997 Lexus LS 400

1 Answer

RX7 with 13b engine is hard to start, idles fine, dies on accel.


problem like this on garden tractor ,was weak coil ,-when engine at low manifold pressure[idle] spark could jump gap and fire cylinder ,higher pressure /under load-wouldn't fire...check color of spark -orange,yellow ,white spark=weak, blue spark is stronge,

Mar 22, 2009 | 1984 Mazda RX-7

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