98 s10 with 4.3 vortec wont start

Asked by Apr 27, 2016 at 09:06 PM about the 1998 Chevrolet S-10 2 Dr LS Extended Cab SB

Question type: Maintenance & Repair

my factory fuel pump went out i
put a after market inline pump
on but it wont start

18 Answers

97,095

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.

Best Answer
72,325

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.

72,325

Good answer tennisshoes...

97,095

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

97,095

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

97,095

Back to factory.

my haynes manual is sayin for a TBI 9-13 psi for fuel pressure

72,325

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

97,095

But you stated it had spyder injectors so it can't be TBI.

72,325

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

97,095

TBI Injection pic

1 of 1 people found this helpful.
97,095

spyder injection pic

1 of 1 people found this helpful.

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

Your Answer

Add photo

Related Questions

  • 98 s10 with 4.3 vortec wont start 18 answers

    my factory fuel pump went out i put a after market inline pump on but it wont start

    1998 Chevrolet S-10 2 Dr LS Extended Cab SB

    -

    Maintenance & Repair

  • 4.3 l Vortec wont start 1 answer

    i have a 2002 S-10 with a 4.3 vortec engine new ecm ingnitioncontrol module crank sensor i even have a new fuel pump recently had to change the right head just put the engine back together drove it to...

    2002 Chevrolet S-10 3 Dr STD Extended Cab SB

    -

    Maintenance & Repair

  • S10 wont start 2 answers

    97 s10 if it is raining are there is alot of moisture outside my truck is hard to start....wife ran it thur a puddle an now i cant get it to start for the last therr days it trys to start but wont ...

    1997 Chevrolet S-10

    -

    Maintenance & Repair

  • Neighboer has a 2003 chevy s10 4.3 vortec wont turn over 2 answers

    shrs been having problems starting the truck she would have to turn the key for 2-45 min sometimes to turn it over she had the starter replaced new battery and everything tested a shop charged her ...

    2003 Chevrolet S-10 2 Dr LS Standard Cab SB

    -

    Maintenance & Repair

  • what is wrong with my 1990 chevy s10 truck if it's getting fire but wont start? 2 answers

    It will turn over but wont start? It's getting fire to the distributor but not to the spark plugs.

    1990 Chevrolet S-10 Baja Standard Cab 4WD SB

    -

    Maintenance & Repair

S-10

Looking for a Used S-10 in your area?

CarGurus has 1,340 nationwide S-10 listings starting at $1,899.

ZIP:

Search Chevrolet S-10 Questions

Chevrolet S-10 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 2,360
#2 John Saffrahn
John Saffrahn
Reputation 1,000
#3 Trebor66
Trebor66
Reputation 990
View All

Related Models For Sale

Used Ford Ranger
182 Great Deals out of 5,559 listings starting at $900
Used Chevrolet Silverado 1500
1,935 Great Deals out of 182,334 listings starting at $999
Used GMC Sonoma
5 Great Deals out of 430 listings starting at $1,388
Used Toyota Tacoma
549 Great Deals out of 42,264 listings starting at $1,995
Used Ford F-150
2,091 Great Deals out of 192,324 listings starting at $290
Used Dodge Dakota
120 Great Deals out of 3,783 listings starting at $1,500
Used Nissan Frontier
335 Great Deals out of 20,675 listings starting at $1,250
Used Chevrolet Blazer
1,169 listings starting at $1,495
Used GMC Sierra 1500
789 Great Deals out of 67,999 listings starting at $1,700
Used Dodge Ram 1500
399 Great Deals out of 10,887 listings starting at $1,000
Used Chevrolet C/K 1500
872 listings starting at $1,950
Used Chevrolet Camaro
370 Great Deals out of 31,228 listings starting at $2,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.