98 s10 with 4.3 vortec wont start
Did you modify the pickup in the fuel tank so it would draw fuel? if your trying to draw fuel through the stock fuel pump it won't work cause the stock pump has a check valve in it that prevents fuel from getting sucked out that way.
Do a fuel pressure bleed down test. Hook a fuel pressure gauge up to the Schrader valve and cycle the key on, off until fuel pressure builds up. It should be 56 to 63 lbs. With the key off watch the fuel pressure, it should not drop more than 5 lbs in 3 minutes. If it does, then the spider injection system would have to be replaced.
Good answer tennisshoes...
Been there, done that. I just hope you got the high pressure inline pump or it will never work. Last time I checked they were just as expensive as a stock fuel pump assembly.
i got fuel goin to it with the inline pump and i put new spider injectors in it because i thought thays why it wouldnt start i can press the valve and has spews out would i have to disconect factory pump for it to work properley
What is the output pressure of the inline pump? It has to have a minimum of 58 lbs for it to work on a Vortec. To use a inline pump you will have to do away with the stock fuel pump and put a pickup tube with a strainer on the end in it's place.
ok ill check the pressure if it dont have enough what do u recomend goin back with factory or inline pump
Back to factory.
my haynes manual is sayin for a TBI 9-13 psi for fuel pressure
1998 Vortec does not have a TBI set-up, it is a MPFI. that requires the 56 to 63 lbs of fuel pressure. 1995 was the last year for a TBI set-up.
mine is a 98 but they guy before me put over sized cam and pistons it has the TBI set up
But you stated it had spyder injectors so it can't be TBI.
Best post a picture of the top of the motor with the air cleaner off, it would save a lot of questions. But check that fuel pressure.
yes spider injector but where mass air flow hook up it looks like a carburator or throttle body idk if thats TBI was goin by what someone told me he said it was TBI idk can u tell me how to tell diference plz srry im confused now
and tx for helpin i will post pics so u can help more
TBI Injection pic
spyder injection pic
its the second pic srry for confusion i knew it had spider injectors but a guy told me that i had a TBI all i have ever worked on were carburator or ones with a fuel rail this is new to me
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