Nasty fuel smell

[chukolac719]

So i recently have a nasty fuel smell, it is stronger when the car is boosting, what can this be, mpg is really poor, after a few times spooling the fuel gauge moves significantly, what can it be??. also a hose that goes on the intake tube is disconected, evap??

 

[VRP]

Still got the Charcoal canister...?

 

[chukolac719]

yes i do why??

 

[VRP]

Check to see if "out" line from canister to incoming air intake- fell off.. If so your venting your gas tank right into engine compartment.

 

[dberry]

alright i have a walbro 255 fuel pump installed on my car evo injectors and a 2g mass and a stock fuel pressure regulator, is it possible my f.p.r. is not working right? if i let my car set for a few days it starts right up, but if i drive it turn it off and try to start it well its pretty much flooded and its a bit difficult to start, plus after awhile my oil smells like gas, i don't drive it much and i change the oil after about 5 times of driving it, what do you guys think?

 

[WhiteVoid]

@dberry
If you're running a 255lph pump you need a adjustable fuel pressure regulator. The fuel lab afpr is always a good choice.

 

[T is for TURBO]

dberry, this is the second thread you've jacked today. Start your own threads

So i recently have a nasty fuel smell, it is stronger when the car is boosting, what can this be, mpg is really poor, after a few times spooling the fuel gauge moves significantly, what can it be??. also a hose that goes on the intake tube is disconected, evap??

Did you check for any fuel leaks? Check the regulator to see if it is wet, you may have killed the diaphragm. As for the disconnected hose to the intake, there are a couple. I believe one is for EVAP, and the other is for venting the valve cover. Before I completely ripped out all of my EVAP stuff, I had a vent off the tank that was open to the atmosphere that caused a strong fuel smell.

 

[Jon91TSi]

@dberry
If you're running a 255lph pump you need a adjustable fuel pressure regulator. The fuel lab afpr is always a good choice.

Not true, while many people say the 255 pump will "over run" the stock FPR, this is not the case. While it may run slightly richer at times, it is in no way un-driveable. When I installed my 255 pump in my 1st 91 AWD my trims were only off by 1 or 2%. I have worked on countless other DSM's with a fuel pump and a stock regulator and all ran just fine. The "over run" theory is just a witch tale, that has never been validated.

 

[WhiteVoid]

I was just going by the upgrade path on the basic hp upgrades where it says that if you go with a 225lph that you'll want a afpr

 

[clbailey]

I have a 255 and have been DD'ing it with a stock FPR for almost a year now.

 

[chukolac719]

Does anyone have a little diagram, that shows where that hose on the intake goes to?? the starter was replaced, and i think this was removed from somewhere around the starter. i just cant see from where.

 

[T is for TURBO]

EVAP Diagram

The big hose that isn't shown in those diagrams on the bottom of the intake tube goes to the nipple on the passenger side of the valve cover.

 

[miguelmcv]

Not true, while many people say the 255 pump will "over run" the stock FPR, this is not the case. While it may run slightly richer at times, it is in no way un-driveable. When I installed my 255 pump in my 1st 91 AWD my trims were only off by 1 or 2%. I have worked on countless other DSM's with a fuel pump and a stock regulator and all ran just fine. The "over run" theory is just a witch tale, that has never been validated.

Every car is different, some regulators can hold on and some can't, my stock regulator worked perfect with my 255, but once my evo 3 turbo boost hard, it sucks,,, However, I still used it for 8 months which I was not boosting to hard, Once I changed it with an aftermarket it was fin,,,..

It is not a theory, DSMers always lean to the save side and will not recommend something to risk their complete engine..

If all of as would have a very good knowledge about what we are doing, then we can recommend something risky, but because there are so many, many newbies that don't even know how to monitor the engine, fuel, etc, etc, etc, they can trash the motor in 1,2,3 steps.

Edit,
To the OP,

Is your 255 Rewired?, If it is, you do need an FPR, But if it isn't and you know what you are doing, or have something to monitor your Fuel, then you could be OK with checking your fuel.