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Blazer Fuel Pump Problems

100 messages,  Last post on Oct 14, 2009 at 1:24 PM

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#95 of 100 fuel pump cpi and the crankshaft sensor by blazerowner Oct 09, 2009 (9:36 pm)
I have a 94 blazer, The fuel pump went out! Fried the wires in the tank! Replaced entire assy. pump works! Got fuel to the test port, havent checked psi as of yet! Replaced the cpi (SPIDER) still no fuel at injectors!!As long as i feed it fuel by hand it runs! The cpi is not working. What controls it! The Crankshaft sensor!! Located bottom leftside of Timing Gear cover!! Aah hah!!! MINE dont have one at least not there! The haynes book clearly shows one but not on my Blazer s-10 4.3 V-6 vortec 4x4 vin 8th w 4 door been in family since day 1 ANY IDEAS outthere i even bought the sensor just to see what it looks like Replies to this message: jlflemmons (Oct 10, 2009 2:50 pm)
#96 of 100 Re: fuel pump cpi and the crankshaft sensor [blazerowner] by jlflemmons Oct 10, 2009 (2:50 pm)
Replying to: blazerowner (Oct 09, 2009 9:36 pm) If yours is a late 93, it may not have the crank position sensor. What Haynes is showing is correct, the CPS is bolted up at the 7 o'clock position relative to the crankshaft pulley.   If your oil pressure sending unit is not registering, the fuel pump will prime, but not run. Safety feature to protect the engine in event of oil pressure loss.
#98 of 100 97 Pressure Regulator by bluejay5 Oct 13, 2009 (5:28 pm)
Have a 97 blazer with fuel pressure problems. Pressure at the fuel rail about 7lb and falls to 0 as soon as pump stops, took the line off at the output of the filter and can NOT hold the pressure back with my finger so i figure the regulator is bad. I also have a 95 that I replaced the regulator assy. about 7 months before the tranny took a powder at 180K. Since both are engine code W shouldn't I be able to use the one use the one from the 95 and put it in the 97? Just trying to save some cash in these times. TIA Replies to this message: jlflemmons (Oct 14, 2009 9:02 am)
#99 of 100 Re: 97 Pressure Regulator [bluejay5] by jlflemmons Oct 14, 2009 (9:02 am)
Replying to: bluejay5 (Oct 13, 2009 5:28 pm) Easy way to check, go to an online parts store (Autozone, Advance, O'Reilly) and look up the regulator for both year models. Chances are it will be the same part number for both.
#100 of 100 Tarry looking gas by whitemfox Oct 14, 2009 (1:24 pm)
I have a 96 Blazer w/v6 vortez, I have been having trouble with it starting, I need to prime it to get to start then it seem to run ok although it reves a littel high when drving. but because of that I have changed the fuel filter several times because when I take it off the gasoline looks blackish and tarry looking and I cannot figure out why any suggestions The fuel pump pressure is a little of 50 psi

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