dsm wise men needed fuel probs vacum line ?

[boostedfwdtsi]

ok i just go this car and its fluding with gas its coming out the crack in my exust manifold its bad.

so i was looking at the vacum line going in to the FPR and its running in to the intake manifold right up front. and the vacum lines that are suposed to be ran in to it are all routed back in to eachother. heres a pic please let me know if this could be my problem

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[boostedfwdtsi]

this is also not my car i dont have a digi cam so i used paint any help would be great and thanks agine

 

[boostedfwdtsi]

also want to add that when i draind the oil about a galon of gas cam out with it

 

[Sharkcus]

That is the fuel pressure solenoid that is blocked off. They often go bad and are very costly to replace, so people just block them off and route the FPR straight to a vacuum source. I did the same thing with my car. Search the forums for Fuel Pressure Solenoid for some more info on it.

 

[Sharkcus]

also want to add that when i draind the oil about a galon of gas cam out with it

wtf? a gallon? are you sure it was gas and not coolant?

I suppose it is possible that the fuel return line was somehow connected to your intake? Might want to check into that before your car blows up.

 

[akdsmer]

With that much overfueling, I would start with checking fuel pressure. I would suspect high fuel pressure, additional unmetered fuel or you could also have ignition problems and are not igniting the air/fuel mixture in the cylinder.

With vacuum applied to the FPR, regardless of how it's routed you will have the stock 36-38 psi fuel pressure. With the vacuum removed it goes up around 5-7psi (on mine anyway). It sounds like:

The regulator is bad (check to see if there is fuel in the vacuum hose from the FPR to the intake- if there is, then the regulator is leaking.)

An injector(s) are stuck open

You are overrunning the regulator with an aftermarket fuel pump.

Its also possible (not likely) that your Evaporative system is saturated and is flowing liquid fuel into the intake instead of fuel vapor (in the event the Evap line was also directly connected to manifold vacuum).

 

[boostedfwdtsi]

The regulator is bad (check to see if there is fuel in the vacuum hose from the FPR to the intake- if there is, then the regulator is leaking.)

well it smells like gas in side the vacum line and looked wet but it is gas in there i know for shure not shure how much thow



anything more i can check and what does it mean if there is gas in the vacum line how do i fix it

 

[boostedfwdtsi]

wtf? a gallon? are you sure it was gas and not coolant?

I suppose it is possible that the fuel return line was somehow connected to your intake? Might want to check into that before your car blows up.

yes it was for shure gas

 

[akdsmer]

anything more i can check and what does it mean if there is gas in the vacum line how do i fix it

If there is gas in that vacuum line then the regulator diapram is leaking. You will need to replace the regulator.

 

[boostedfwdtsi]

ok also could there be gas in my down pipe that will catch fire ?

anything more i should check/do b4 i try to start it agine. i know its ###### filled up with gas agine so im going to have to drain the oil/gas and get another mobil1 oil filter. but should i take the exust off to make shure theres no gas in there

also why would the regulater make the engine fill up with gas so fast ? with in 30seconds we could see gas coming out the crack in my exust manifold.

 

[akdsmer]

also why would the regulater make the engine fill up with gas so fast ? with in 30seconds we could see gas coming out the crack in my exust manifold.

If the regulator is really bad you have fuel pressure (at appx 35psi) being pushed into a intake manifold with 20 inches of vacuum. You can get a LOT of fuel into the engine, and remember when the engine is cold there is no fuel feedback, so the PCM is also injecting the amount of fuel the engine thinks it still needs.

Also, if you have a return line that is partially blocked, crimped, pinched or such, you will also not allow extra fuel pressure and volume to return to the tank and that will also increase the amount of fuel being dumped into the engine!

 

[akdsmer]

also why would the regulater make the engine fill up with gas so fast ? with in 30seconds we could see gas coming out the crack in my exust manifold.

Spell-Check is the option right next to Submit Reply...


If the regulator is really bad you have fuel pressure (at approx 35psi) being pushed into a intake manifold with 20 inches of vacuum. You can get a LOT of fuel into the engine, and remember when the engine is cold there is no fuel feedback, so the PCM is also injecting the amount of fuel the PCM thinks the engine still needs.

Also, if you have a return line that is partially blocked, crimped, pinched or such, you will also not allow extra fuel pressure and volume to return to the tank and that will also increase the amount of fuel being dumped into the engine!

I wouldn't worry about the fuel in the exhaust. Any combustion will be in the pipe or cat. Remember that the cat works at 600 degrees so a little fuel burning off will be no real problem. But as the lawyers say...."your results might vary" and "don't try this at home"!