96 blazer no start please help tring to work on it friday night

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96 blazer no start please help tring to work on it frid... - 1/31/2008 8:08:22 PM    Ridinblazer   Posts: 24 Joined: 1/24/2008 Status: offline Hello everyone i have a 96 blazer, it has a hard start problem, it first started off as really har dstarting just crnking it over then i turned the key on and off till i heard the fuel pump kick on kinda of like a primeing thing, if i shoot a shot of ether down the throttle body it will start, once it starts sometimes it would bog down until it stalled and i noticed the converter was starting to get red and i could smell sulfur so i replaced the o sensor and converter, i also replaced the cap, rotor, wires, coil, when i crank it once the fuel pressure only goes to 45-48lbs if i keep cranking it it goes to ablut 50-52 sometimes its goes to 60lbs when it goes to 60 it kinda starts so i am wonder do i need a fuel pump or what please help thanks i am trying to work on friday night so any hints will help Post #: 1

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:12:53 PM    thegr81 Posts: 2621 Joined: 1/16/2007 From: PHOENIX,AZ Status: offline Sounds like a fuel system issue, when was the last time you changed the fuel filter??? _____________________________ 2001 2wd 4.3 vortec v6 "I'm not fat, I'm a minitrucker" (in reply to Ridinblazer) Post #: 2

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:18:37 PM    Ridinblazer   Posts: 24 Joined: 1/24/2008 Status: offline i replaced with all those other parts acutally before that i replaced it when i first had the issuse (in reply to thegr81) Post #: 3

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:21:53 PM    swartlkk Posts: 14293 Joined: 5/1/2005 From: Waterloo, NY Status: offline If you have replaced all of the other components, you probably are looking at a pump problem. _____________________________ Kyle- 2004 Rainier 1970 Chevelle - Resto 1974 K5 Blazer - Resto (in reply to Ridinblazer) Post #: 4

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:22:42 PM    Ridinblazer   Posts: 24 Joined: 1/24/2008 Status: offline yeah thats what i was thinking it really dont bother me replacing it i just wanna narrow it down to the pump (in reply to swartlkk) Post #: 5

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:23:58 PM    thegr81 Posts: 2621 Joined: 1/16/2007 From: PHOENIX,AZ Status: offline I just replied to his pm with that same answer kyle LOL!!!! _____________________________ 2001 2wd 4.3 vortec v6 "I'm not fat, I'm a minitrucker" (in reply to Ridinblazer) Post #: 6

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:24:05 PM    rriddle3 Posts: 1308 Joined: 12/22/2006 From: Fort Worth,Texas Status: offline Let's try the standard fuel pump test. Hook your fuel pressure gauage to the schrader valve on the inlet line, turn the key to the 'on' position (not 'start') and check the pressure. You want 55-62 psi. Turn the key off and see if the pressure holds. If it drops more than ~2-3 psi and then continues to drop over the next few minutes, there's a problem. Let us know. _____________________________ 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 (in reply to Ridinblazer) Post #: 7

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:27:37 PM    Ridinblazer   Posts: 24 Joined: 1/24/2008 Status: offline when i turn the key on it doesnt go to 50lbs it goes more like to the 40's unless i crank it it goes like to 52 (in reply to rriddle3) Post #: 8

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:28:40 PM    thegr81 Posts: 2621 Joined: 1/16/2007 From: PHOENIX,AZ Status: offline I am going with fuel pump or fuel pressure regulator on this one!! _____________________________ 2001 2wd 4.3 vortec v6 "I'm not fat, I'm a minitrucker" (in reply to Ridinblazer) Post #: 9

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:30:09 PM    rriddle3 Posts: 1308 Joined: 12/22/2006 From: Fort Worth,Texas Status: offline Fuel pump. There's not enough pressure to even start it. _____________________________ 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 (in reply to thegr81) Post #: 10

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:31:06 PM    Ridinblazer   Posts: 24 Joined: 1/24/2008 Status: offline once it starts running the fuel pressure goes up to like 56 - 62 (in reply to thegr81) Post #: 11

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:32:50 PM    thegr81 Posts: 2621 Joined: 1/16/2007 From: PHOENIX,AZ Status: offline Yea fuel pump is way more plausible on this myth busting event here I will now stick to fuel pump!!! _____________________________ 2001 2wd 4.3 vortec v6 "I'm not fat, I'm a minitrucker" (in reply to Ridinblazer) Post #: 12

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:35:09 PM    Ridinblazer   Posts: 24 Joined: 1/24/2008 Status: offline alirte guys thanks you very much for all ur help ill put a pump in tommrow night so ill let u know how it works out (in reply to thegr81) Post #: 13

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:36:44 PM    swartlkk Posts: 14293 Joined: 5/1/2005 From: Waterloo, NY Status: offline As riddle said, how does the pressure hold after you turn the key off?  Does it drop? The FPR is off the back side of the injection spider under the plastic upper plenum.  The SCFI motors don't have anywhere near the problems with the FPR that the CPI motors had. One other way to lock it down to the pump would be to remove the fuel filter and hook up a pressure gauge on the supply line back there.  This would eliminate the FPR from the equation.  If your pump does not reach 60psi, then you either have a pump or a voltage supply problem... _____________________________ Kyle- 2004 Rainier 1970 Chevelle - Resto 1974 K5 Blazer - Resto (in reply to thegr81) Post #: 14

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:39:54 PM    Ridinblazer   Posts: 24 Joined: 1/24/2008 Status: offline it stay at what it was on at as when i turned the key on (in reply to swartlkk) Post #: 15

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:41:28 PM    rriddle3 Posts: 1308 Joined: 12/22/2006 From: Fort Worth,Texas Status: offline quote: ORIGINAL: swartlkk The SCFI motors don't have anywhere near the problems with the FPR that the CPI motors had. Man, I hope that statement didn't just jinx my regulator. quote: it stay at what it was on at as when i turned the key on Then I'm going to call it a bad pump. < Message edited by rriddle3 -- 1/31/2008 8:46:54 PM > _____________________________ 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 (in reply to swartlkk) Post #: 16

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:43:22 PM    Ridinblazer   Posts: 24 Joined: 1/24/2008 Status: offline what do u think (in reply to rriddle3) Post #: 17

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:53:14 PM    Ridinblazer   Posts: 24 Joined: 1/24/2008 Status: offline whats scfi mean (in reply to Ridinblazer) Post #: 18

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:53:17 PM    thegr81 Posts: 2621 Joined: 1/16/2007 From: PHOENIX,AZ Status: offline I am still going with a pump issue but to make sure do the test Swartlkk suggested to make sure so your not just swapping out part after part!!! _____________________________ 2001 2wd 4.3 vortec v6 "I'm not fat, I'm a minitrucker" (in reply to Ridinblazer) Post #: 19

RE: 96 blazer no start please help tring to work on it ... - 1/31/2008 8:59:13 PM    Ridinblazer   Posts: 24 Joined: 1/24/2008 Status: offline i dont have a presure tester like that just the one that hooks up to the valve (in reply to thegr81) Post #: 20

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