need alittle help 94 blazer vortex
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need alittle help 94 blazer vortex - 6/3/2008 6:52:55 PM
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chopsling
Posts: 7
Joined: 6/3/2008
Status: offline
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Hey peeps
So I'm new but I have been reading throught all the post looking for help on my blazer. So thinkin I would pick all your brains on this with a new post.
I have a 1994 blazer vortex motor
Seem like I'm not getting any fuel, pressure is good,new fuel filter, fuel pump sounds like it's working. So I'm at a loss, I took the rear fuel line out of the fuel filter and turned it over to see if it is spitting gas. And it does alot. so I'm missing somthin up more torwards the motor? Thanks for any help with this.
Gy
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RE: need alittle help 94 blazer vortex - 6/4/2008 12:48:36 PM
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chopsling
Posts: 7
Joined: 6/3/2008
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sorry about the double post.
so will the fuel pump make noise if not working?
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RE: need alittle help 94 blazer vortex - 6/4/2008 1:08:54 PM
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rriddle3
Posts: 1311
Joined: 12/22/2006
From: Fort Worth,Texas
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Well, a fuel pump can make noise and still not be supplying enough fuel to run the engine. Can you tell us exactly what symptoms the truck is exhibiting? Have you used a fuel pressure gauge to check the fuel pressure?
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2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip
TYC Elegante carbon fiber tail lights
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RE: need alittle help 94 blazer vortex - 6/4/2008 1:12:54 PM
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chopsling
Posts: 7
Joined: 6/3/2008
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I don't have a pressure gauge to check it with. Is there anything else I can do to see if it is getting the needed pressure?
It sounds like it wants to start up,but won't fire up enless I spray it with start spray. Fuel pump hums when turned on.
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RE: need alittle help 94 blazer vortex - 6/4/2008 1:19:17 PM
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swartlkk
Posts: 14299
Joined: 5/1/2005
From: Waterloo, NY
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You have to check it with a gauge. Some parts stores are starting to rent equipment like this for a fee, fully refundable upon return of the tool.
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Kyle-
2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto
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RE: need alittle help 94 blazer vortex - 6/4/2008 1:21:22 PM
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rriddle3
Posts: 1311
Joined: 12/22/2006
From: Fort Worth,Texas
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At least a 50/50 chance that it's the pump, but without testing with a gauge you can't tell too much. It's a 'rule out' procedure. The problem could also be not enough spark. Have you checked for spark at the plug-end of the wires?
_____________________________
2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip
TYC Elegante carbon fiber tail lights
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RE: need alittle help 94 blazer vortex - 6/4/2008 1:35:08 PM
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chopsling
Posts: 7
Joined: 6/3/2008
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yes has good spark. So if I need to change out the fuel pump, how hard of a job would it be?
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RE: need alittle help 94 blazer vortex - 6/4/2008 2:13:14 PM
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rriddle3
Posts: 1311
Joined: 12/22/2006
From: Fort Worth,Texas
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Well, I haven't had to do it on mine (knock on wood), but it can be a pain. There are several threads from folks that have done it themselves. Have a read (use the 'search' function for 'change fuel pump' etc) and see what you think.
_____________________________
2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip
TYC Elegante carbon fiber tail lights
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RE: need alittle help 94 blazer vortex - 6/8/2008 7:29:27 PM
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chopsling
Posts: 7
Joined: 6/3/2008
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ok so I got the fuel pump in today, pressure is all good but does not want to start. any ideas? thanks
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RE: need alittle help 94 blazer vortex - 6/9/2008 1:13:58 PM
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rriddle3
Posts: 1311
Joined: 12/22/2006
From: Fort Worth,Texas
Status: offline
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To start an engine it takes air, fuel, and spark. You said the spark is good, I assume air is getting to the engine, so that leaves fuel. You still have not tested the pressure, right?
_____________________________
2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip
TYC Elegante carbon fiber tail lights
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RE: need alittle help 94 blazer vortex - 6/9/2008 1:15:37 PM
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chopsling
Posts: 7
Joined: 6/3/2008
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I have tested the pressure 55psi I broke down and went and picked one up.
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RE: need alittle help 94 blazer vortex - 11/17/2008 11:26:29 AM
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Leeann_Bravada
Posts: 72
Joined: 8/27/2008
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55 psi is too low to start. You need 60-64 psi for that engine.
You need to look under your intake plenum and see if you have any leaks - it''s possible the fuel pressure regulator is leaking, causing the lower pressure. Fortunately, that''s a $45 part (plus the ~$15 intake gasket).
If you pull the plastic Vortec cover (T-30) off the top of your motor, you will see a round thing in the center of the plenum. That''s your IMTV. There are 2 more Torx screws holding that down - I think they''re T-20. Unplug the connector, then unscrew them and gently twist the IMTV side to side. You might need to spray some WD-40 around the edge to help it break loose. Be gentle; there''s an O-ring sealing it to the upper plenum and you need it intact. Once it''s free, pull it out. Look inside with a flashlight: if you see any clean spots (will look gold-colored) on the passenger side, your fuel pressure regulator is leaking. If you have clean spots on the driver''s side, it might be the ''nut kit'' leaking (about $60, I think). If you see any washed areas, it''s time to pull the plenum. Note on reinstalling the IMTV: lightly lubricate the O-ring with a little engine oil.
For that, you''ll need a 10mm deep socket. There are something like 10-11 nuts/studs around the outside of the plenum to remove. Make note of which goes where - they''re not all the same. Take pictures; they can be really helpful.
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93 Bravada vin W
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