I have a 94 LT1 yesterday I noticed fuel on my garage floor looked at my engine and the flang at the exhaust pipe and manifold on both sides were wet with fuel..any ideas??

 

possibly a leaking injector, crack your fuel cap and release any built up pressure. This should stop the draining fuel for the time being...you don't by chance have a hot water heater in the garage?

 

one more thing...check your oil level, fuel may have found it's way into the crankcase.

 

Turn the key and pressurize the system. Then watch it for a while to see if you can see anything visual. Also check the FPR vacuum line to see if it is wet and leaking.

Is this a new problem, or has it been leaking for a while now.

 

Sounds like the fuel pressure regulator diaphragm has ruptured. Mine sprayed fuel all over the rear of the engine and the fuel caught on fire when it hit the catalytic converter.

Could be a problem with the fuel rails.

 

I opened the fuel cap and released all the pressure but I still have a puddle under the car..no wet injectors just the exhaust/manifold flang

 

Have you checked any of the suggested items.

If you have a fuel pressure gauge, you can watch the pressure and see if it drops to quickly.

 

Where is the gas coming from? thats easy enough to see...

if you say its leaking from INSIDE the exhaust pipe and manifold, then you have a blown fuel regulator thats flooding the engine with raw gas and has probably filled the crank case with gas. Pull the dipstick and see if you have TOO MUCH oil on the stick...
A shorted fuel injector will do this also.


That is the only way that raw gas can fill the engine and leak out the manifold.

IF its leaking from above and dripping down onto the pipe...follow the leak and see where its coming from.

BUT

DO NOT try to start that car until you KNOW where the gas is coming from, and that it has stopped. You WILL burn your house down..car too.
The fumes can ignite from the heat of the cat or any stray spark. IF the engine is flooded with gas it could be much much worse...like an explosion if a spark found the gas in the pan...

I've seen some scarey **** before, but the thing that had me shaking for a week was a C4 that was filled with gas from a shorted injector and I tried to start it not knowing any better....and it blew raw gas all the way thru the exhaust when it fired and ran on one bank for about 10 seconds and OUT the tail pipes....lots of raw gas blowing out the back of the car... Thru a hot cat and the crankcase was full of gas also. The car was parked inside the garage too.

That is something that scared me half to death and something that I got very lucky with..nothing ignited or burned.

Find the source or at least narrow it down to something internal or a leak on the outside from an injector or a line thats dripping down onto the pipes. It shouldn't be too tough. Just use common sense and do ventilate the garage or the space and use caution as long as there is liquid and fumes present.

Fuel injection has a LOT of places for gas to leak. Each inj has several O-rings, every section of the fuel rails have a handful of O-rings, fuel lines, regulator...return lines...lots of places. You just got to get in there and look.

 

have you made any progress...is it still dripping?

on the left fuel rail, rear, is a fuel pressure regulator. Remove the vacuum hose and inspect it for signs of fuel.
If you tighten the fuel cap back down the fuel leak may return.

 

thanks everyone for the great advice..can't turn a wrench anymore because of nerve damage from gas poisoning during desert storm..but I found the leak..it was the fuel regulator..car is being towed to garage..thanks again everyone

 

Glad you got it before "it" got you...

sorry to hear of your injuries... Your service is greatly appreciated though...

 

x2