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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29534
Experience:  GM Grand Master Technician 2007. 14 years experience.
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1997 chevy astro: wont start..good fuel pressure,good spark

Resolved Question:

1997 chev astro van won't start,good fuel pressure,good spark,turns over good.
Submitted: 8 years ago.
Category: Chevy
Expert:  GM Tech (Cam) replied 8 years ago.
WelcomeCustomer What did pressure did you measure from the fuel system?
Customer: replied 8 years ago.
the fuel feed line was 60 psi
Expert:  GM Tech (Cam) replied 8 years ago.
Ok, did you check for spark at all the plugs or just the coil?
Customer: replied 8 years ago.
all the plugs.
Expert:  GM Tech (Cam) replied 8 years ago.
OK, do you have access to a code reader? We need to see if there are any faults that are not allowing the engine to start. Also, when was the last time you changed the cap and rotor? I realize you have spark, but often a bad cap and rotor will cause enough issues that will prevent it from starting. Also have a look at the wiring under the front of the engine for the crankshaft sensor. There are faults that can happen with it that will throw the timing out and prevent it from starting.
Customer: replied 8 years ago.
changed cap,rotor and plugs friday.changed crankshaft sensor yesterday.
Expert:  GM Tech (Cam) replied 8 years ago.
Can you try putting a small amount of gas into the intake just to be sure?
Customer: replied 8 years ago.
put gas intake and started up.idling fine.
Expert:  GM Tech (Cam) replied 8 years ago.
Ok, that means the fuel pump is not strong enough and cannot deliver the pressure needed to overcome the pressure in the injector. The little bit of gas helped get the engine running so the vacuum could help the fuel overcome that pressure. Start with a fuel filter and see.
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