V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

GM+Crack Rocks+Crack Pipe= MPFI v6

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Old Jun 23, 2003 | 01:18 AM
  #1  
Soulrev's Avatar
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From: Colorado
Car: Formerly - 87 T/A, 87 Bird.
GM+Crack Rocks+Crack Pipe= MPFI v6

OK ok, I'm used to the TPI, v8's in our cars but when I bought this v6 mpfi it's been a whole new experience.. The v6 has an internal problem, most likely a bearing, so I'm putting an 8 in the car.. I like how GM played the "Let's see how much **** we can squeeze together really tight and make this car a knuckle bleeding pain in the *** to work on" For such a small motor they sure managed to squeeze everything nice and snug right next to eachother.. Here's a question though.. I'm getting ready to take off the fuel lines.. Now on the V8 they were towards the front so I could just let the fuel drain into a coffee can.. On the v6 they're in the back.. So I'm wondering if there's a better way to get that fuel out of the lines rather than just disconnecting them from the fuel rail and trying to get it to pour into a container? I'm guessing it wouldn't all drain out from like the fuel filter end would it? I don't want a bunch of gas all over the engine bay and just wondering if you guys know anything about this procedure.. I feel sorry for anyone that doesn't want a V6 and has one
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Old Jun 23, 2003 | 02:54 AM
  #2  
Doward's Avatar
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From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
Just hit the schrader valve with a rag on it. That's all I did. There isn't THAT much gas in there!
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Old Jun 23, 2003 | 08:24 AM
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From: New York
Lol, if you think a 3rd gen V6 car is cramped, try working on an LS1 or worse an LT1 4th gen. My 2.8 is cake, hell there's enough room in there to practically stand in the engine bay between the motor and radiator!
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Old Jun 23, 2003 | 09:51 AM
  #4  
TomP's Avatar
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From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
A v8 TPI seems a lot more cramped to me.. but then again, I never took the fuel rail off. My fuel pressure gauge has a pressure purge button on it and a length of tubing; after connecting the gauge to the Schraeder valve, you press the purge button, and all the fuel goes out thru the vinyl tube into the gras--er, into a container certified to carry gasoline.

Alternative is to wait a few hours for pressure to bleed off, AND for the motor to cool. There should be no pressure left in the lines, and you won't have to worry about starting a fire if the engine's cool. You might want to remove your battery too in the off-chance that you mistakenly drop a screwdriver over the terminals and get a spark (boom)!
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Old Jun 23, 2003 | 11:03 AM
  #5  
Denis.V's Avatar
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From: Santiago, CHILE
Car: 1986 Pontiac Firebird Trans Am
Engine: 305 Tuned Port Injection
Transmission: The famous 700R4
Axle/Gears: No idea
I agree with soulrev and others.

When I finished rebuilding the aluminum heads in my MPFI 2.8 V6 FWD car, I decided to test the compression without intake manifold and with the fuel lines DISCONNECTED. I put a little pan as a fuel recipient...............................................................................................................................................................................cylinder 1, 2, 3, 4, 5 ......kaboooommmm!

-FIRE in my engine with flames until 1 mt. x 1 mt . x 50 cm.
-Wife calling to firemen.
-Children crying.
-Neighbours with garden hose in my garage.
-Dogs and cats in my garden.
-Me buying news hoses, electrical connectors, etc. etc.
-A lot of extra time for finish the rebuild job.
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Old Jun 23, 2003 | 12:24 PM
  #6  
Doward's Avatar
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From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
lol! Sorry, if I was to do a compression test without the injectors/manifold on, you can bet that fuel pump would be DISCONNECTED! :sillylol:

Live and learn, I suppose! :lala:
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Old Jun 23, 2003 | 05:13 PM
  #7  
Soulrev's Avatar
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From: Colorado
Car: Formerly - 87 T/A, 87 Bird.
Originally posted by NHRATA01
Lol, if you think a 3rd gen V6 car is cramped, try working on an LS1 or worse an LT1 4th gen. My 2.8 is cake, hell there's enough room in there to practically stand in the engine bay between the motor and radiator!
Well sure there's plenty of room in front of the motor but in MPFI applications, everything is scrunched up close together.. You'd think with such a small engine they could spread stuff out a little more.

As for the working on an LS1 4th gen, already have.. That's why I'll never own one, aside from the fact that they look like jellybean cars.. Compact, like everything these days.
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