Engine wont start, oil smells like gas

[loud2004marquis]

Had to get a new battery in the Marauder probably due to the cold weather and not starting it for a couple months with no trickle charger.

Engine now turns over, but wont start. After about 15-20 seconds of cranking I smell gas coming out of the tailpipes. Took the oil dipstick out and it smells like gas.

I was going to remove a plug and check for spark, take out all the plugs and crank the engine over to dry out the excess gas and replace the spark plugs with new ones, but am wondering if it's safe to try to get the engine to start with the gas mixed with the oil?

Or should I do an oil change first?

Any advise on where to start?

[RubberCtyRauder]

Car is toast..I'll buy it for $8.00:lol:

I would recommend changing oil..it's cheap insurance..

[RacerX]

DO NOT TURN the key to on position!!! You need to check the FRPS (Fuel Rail Pressure Sensor)! Take the vacuum/pressure hose off of it and see if it smell like gas. You can also take it completely off the rail. If you can blow through it. It's blown, your plenum likely has an assload of fuel in it and you'll need to change your oil. Ask Jake how I know this.

[loud2004marquis]

Just took the FRPS off the rail, the vacuum hose that goes to it smelled like gas a little, but not a strong smell.

Wiped the gas off the sensor and tried to blow through it both ways and no air got through, looks to still be good.

Do you think I should change the oil first and then clear the gas out of the cylinders, put new plugs in and see if it will start?

[RacerX]

Hmmmm... Pull a plug and see if it's dry? If there is extra fuel somehow in the cylinders, you can try starting the car with the gad pedal matted to the floor, this shuts off the fuel, but, allows spark.

[loud2004marquis]

Hmmmm... Pull a plug and see if it's dry?

Took a plug out and it was wet with gas, looked down the hole with a flashlight and saw a puddle of gas in the cylinder.


If there is extra fuel somehow in the cylinders, you can try starting the car with the gad pedal matted to the floor, this shuts off the fuel, but, allows spark.

Should I change the oil first or just try starting it?
(Not sure how touchy all this is)

[ChiTownMaraud3r]

This is interesting, how does this happen? I leave my car for weeks without starting during the winter...

[RacerX]

Sounds just like an FRPS problem... Hmmm... Obviously you need to fix the problem first because even if you start the car with the pedal to the floor to dry out the cylinders, the existing issue may continue to flood them more. Not to mention, your intake plenum may have a couple gallons of fuel in it...

[marauderthis]

Extreme temperatures is very destructive to cars,
a lot of of contraction and expansion.

[RacerX]

Pull the fuel pump fuse then put the pedal to the floor to see if it helps dry them out . You know you have a lot of fuel in the plenum if it starts running and puffing out huge white puffs of smoke.

[8UWITH6]

I would pull all the plugs and disable the fuel and ignition system and crank it over to clear the cylinders. Yes, change the oil even if you just drain it and fill it with new for diagnostic purposes then once you repair the car change the oil and filter again. Just my .02

[loud2004marquis]

Got it straightened out late last night. Took out all the plugs and didn't see any more gas in the cylinders like I did earlier in the day. Put new plugs in, changed the oil and it fired right up no problem and didn't run rough at all. Let it idle for about 15 minutes and all is good! Hopefully it's all set.

[RubberCtyRauder]

Good to hear!!!:beer:

[RacerX]

May have had an injector stuck open and just happened to pull that plug first. Good to hear all is well now.

[Hadamustang1]

SO.. She fixed herself? Awesome.. still wonder what the problem was..

[8UWITH6]

Cars don't fix themselves. Keep a close eye on it!:-)

[myrodr]

Glad to here its working. Maybe get checked for codes that did not trip CEL

[loud2004marquis]

Cars don't fix themselves. Keep a close eye on it!:-)

Plus to the one!


Maybe get checked for codes that did not trip CEL

Good idea, gonna try that and see if anything comes up.


May have had an injector stuck open and just happened to pull that plug first.

Not sure exactly what it was, but will be keeping a close eye on it. Was wondering if 60/lb injectors have anything to do with it...But I think the pulse is adjustable with whatever size injectors you have, so maybe not. I do remember cycling the fuel pump a few times before first trying to crank it because it was sitting for a while. Oh well, hope to not have that problemo again!

[boatmangc]

I have seen injectors stick open and fill a cylinder on its compression stroke.

[MM2004]

Plus to the one!



Good idea, gonna try that and see if anything comes up.



Not sure exactly what it was, but will be keeping a close eye on it. Was wondering if 60/lb injectors have anything to do with it...But I think the pulse is adjustable with whatever size injectors you have, so maybe not. I do remember cycling the fuel pump a few times before first trying to crank it because it was sitting for a while. Oh well, hope to not have that problemo again!

FWIW...

I'm running 39lb. injectors, GT40 pump and 40 Amp Boost-A-Pump. My MM sits for weeks at a time, and I have never "cycled" the fuel pump prior to starting.

She has always fired right up with no problems whatsoever.

Maybe next time, try not cycling the fuel pump and see how she starts?

;)

Mike.

[RacerX]

The computer takes care of the injector firing, wether at idle or wot, wether 24lbrs or 80lbrs. It can't control an injector stuck open. Maybe throw some Techron injector clean in the tank. It's not good to let gas sit in a tank for long periods. You get a lower octane over time as well as sludge buildup.