Cranks/no start condition

1999 CHEVROLET ASTRO
165,000 MILES • 4.3L • V6 • 4WD • AUTOMATIC
Avatar
BROTHER BUZZ
  • MEMBER
  • 32 POSTS
i started with the three basic steps, spark, fuel and air. it seemed like it was not getting gas. put on my fuel pressure on the Schrader valve turned the key to on 21 psi for prime cranking engine was 25 psi. i changed fuel filter it was clogged bad/replaced/no start/tested it again this time it was 10 psi. Cranking same fuel pump was coming on koeo, you turn the key off the pump ran for three to four seconds. i changed the fuel pump and still no start. the fuel pressure tester is good. i tried it on two other cars, i primed it three to four times gas spraying out of Schrader valve on my arms, seat, a lot. any help? If spark is next/how? please it is a Vortec engine. also, if this helps, the guy i got this from said there was a check engine light on for two months. he had it cleared before i bought it. it was a EVAP code. Help me guys, Steve, Ken. Thank you, brotherbuzz.
Dec 17, 2017 at 6:34 AM
Advertisement
Avatar
PATENTED_REPAIR_PRO
  • ASE Certified Mechanic
  • 1,853 POSTS
  • ASE Certified Mechanic
The fuel pressure should be 56-62 psi, so if you changed the fuel pump and the pressure is still low, chances are your fuel pressure regulator is bad.
It is located under the upper intake manifold, so that will have to come off.
Dec 17, 2017 at 6:49 AM
Avatar
BROTHER BUZZ
  • MEMBER
  • 32 POSTS
is there any easy way to do this job? like do i have to remove all the stuff on top of intake? There is no room. Any help on what to remove or what i can leave on.? Brother Buzz. Thanks
Dec 19, 2017 at 10:14 AM
Avatar
PATENTED_REPAIR_PRO
  • ASE Certified Mechanic
  • 1,853 POSTS
  • ASE Certified Mechanic
This is what the repair manual says, "remove air cleaner assembly. Remove interior engine cover (if equipped). Remove canister purge solenoid. Disconnect A/C pressure switch, Throttle Position (TP) sensor, Idle Air Control (IAC) motor, Sequential Central Port Injection (SCPI) harness connector and the Manifold Absolute pressure (MAP) sensor.
Disconnect accelerator and cruise control cables from throttle body. Disconnect fuel lines at rear of engine. Remove brake booster vacuum hose. Remove upper intake manifold bolts. Remove upper intake manifold."
Manufacturer does not provide a torque sequence for upper intake manifold on 4.3L. Tighten upper intake manifold bolts to specification in a criss-cross pattern.
First pass 44 ft lbs, second pass 88 ft lbs.
Dec 19, 2017 at 10:38 AM
Avatar
BROTHER BUZZ
  • MEMBER
  • 32 POSTS
Thanks patented_repair_pro goin to start on this Saturday morning, i'll let you guys know what happened
Dec 23, 2017 at 12:29 AM
Avatar
PATENTED_REPAIR_PRO
  • ASE Certified Mechanic
  • 1,853 POSTS
  • ASE Certified Mechanic
Ok
Dec 23, 2017 at 6:03 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.