fuel coming out exhauts

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fuel coming out exhauts

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Blazer >> Mechanical & Maintenance >> General Tech Help >> 2nd Gen (1995-2005) Tech >> fuel coming out exhauts

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fuel coming out exhauts - 8/21/2008 7:38:55 PM

dice631

Posts: 1
Joined: 8/21/2008
Status: offline

96 blazer v6 it has spider injection. i had replaced fuel pump thinking it had the wrong fuel psi, also changed the spider injection and still raw gas is going out the exhaust and also fill up cyclinders 6 an 5. i all ready check for leaks in maniflod and fuel lines....no leaks. i give up on ideas

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RE: fuel coming out exhauts - 8/21/2008 7:52:14 PM

swartlkk

Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

If you have fuel coming out of the exhaust and flooding out cylinders 5 and 6, then you have a leak internal to the engine. The fact that it is flooding out 5 and 6 tells me that the FPR is shot. To verify, remove the fuel lines from the top of the engine, remove the upper plenum, and reinstall the fuel lines. Pressurize the system and look for leaks.

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Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to dice631)

Post #: 2

RE: fuel coming out exhauts - 8/21/2008 7:55:57 PM

94blueknight

Posts: 1515
Joined: 12/31/2007
From: Wisconsin
Status: offline

ya i had raw fuel comin out my tail pipe when my fuel lines inside the plenum were bad. def take the upper plenum off and look inside. i would turn the key to the on position with the upper plenum off so u send pressure to the injector and can see if u have a leak in the plastic fuel lines inside the plenum.

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CHECK IT OUT its ME!

(in reply to swartlkk)

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RE: fuel coming out exhauts - 8/21/2008 8:07:24 PM

swartlkk

Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

The 96+ are SCFI motors. The only plastic fuel lines are between the injectors and the poppet nozzles. The fuel feed and return lines are metal and are on the exterior of the intake plenum.

_____________________________

Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to 94blueknight)

Post #: 4