2002 Pontiac Bonneville Fuel leak at engine

NOTAPROMIKE2

MEMBER
2002 PONTIAC BONNEVILLE
3.8L
V6
FWD
AUTOMATIC
140,000 MILES

Fuel dripping at back of motor where the hard plastic 90 degree elbow connects to the metal fuel rail. I replaced the plastic connector on the metal line coming from the engine and now it leaks worse. When I took it apart the 2nd time, there were 2 o rings on the metal line from the engine above the plastic connector that I had just replaced. They both appear to be slightly damaged. Cuts indentations. One is soft and pliable, the other seems to be made of hard plastic. I do not know where they go. I would like to fix it right, however I am travelling and need a fix. To get me another 2,000 miles. If I simply cut out the 90 degree plastic elbow and splice the hard plastic line coming from the fuel tank to the metal line coming from the fuel rail with a piece of fuel line and 2 metal hose clamps. Will this work? A "mechanic" friend says it will as long as there is no type of control valve involved. I'm worried about the pressure. Please help and be willing to respond or possible take a phone call from me. Thank you. Mike Ellis

5 Replies

SCHUELERAUTOSERVICE

MEMBER
8 POSTS

You may be close to the source of the problem by the elbow, maybe a hairine crack in the fuel rail side or a burr cutting the oring seals when you put the new connector on. I've used the plastic line repairs before and there not easy to work with usless your use to them. Usually if you remove the connector and it comes apart indicates an abnormal tighness or rust usually does it. They usually come with small clamps the require the use of a cv boot clamp tool. Its a 3/8" line I believe and available usually at partsource.

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Monday, February 23rd, 2015 AT 6:41 PM

DR LOOT

MECHANIC
2,311 POSTS

It depends how far back you're going to splice into the fuel line? The manual itself on the theory and operation of that fuel system states the following: "The fuel pump flex pipe acts to dampen the fuel pulses and noise generated by the fuel pump." If you don't go back as far as the flex pipe you will probably be okay. It's hard to be a psychic mechanic. If you are still stuck tomorrow let me know and I will run down to our local wrecking yard and look at one of those vehicles for you and see what we can do to repair it.

Vehicle Reference: ENGINE CONTROL SYSTEM - THEORY & OPERATION
FUEL SYSTEMS > FUEL DELIVERY > Fuel Pump

The fuel pump is mounted in the fuel sender assembly reservoir. The fuel pump is an electric high pressure pump. Fuel is pumped to the fuel rail at a specified flow and pressure. Excess fuel from the fuel rail assembly returns to the fuel tank through the fuel return pipe. The fuel pump delivers a constant flow of fuel to the engine even during low fuel conditions and aggressive vehicle maneuvers. The PCM controls the electric fuel pump operation through a fuel pump relay. The fuel pump flex pipe acts to dampen the fuel pulses and noise generated by the fuel pump.

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Monday, February 23rd, 2015 AT 7:24 PM

NOTAPROMIKE2

MEMBER
31 POSTS

So. If I cut out the hard plastic elbow coming from the fuel tank and connect this line to the metal fuel rail with a piece of fuel line and 2 hose clamps, will this work? Will it hold the pressure and not screw anything up? No control valve to worry about in that elbow?

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Monday, February 23rd, 2015 AT 7:57 PM

NOTAPROMIKE2

MEMBER
31 POSTS

Need an answer to my last question please? Will it hold pressure if spliced with a fuel line?

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Tuesday, February 24th, 2015 AT 6:54 AM

DR LOOT

MECHANIC
2,311 POSTS

If there was a house of hose nearby, that specializes in hoses you could get a compression fitting for the metal line but the fuel lines should work, make sure its high-pressure injection line and use two (2) hose clamps pure end of hose, back to back make sure the hose clamps are USA and not China! That is a must