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2003 Buick rendezvous.turns over will not start. Replaced fuel pump,both crank sensors,timing chain,plugs, wires,fuel pressure regulator. What else need I check?

When turning over, the rpm needle dose not move

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  • Buick Master
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I saw what you replaced. What testing have you done? Make sure battery has a full charge. Have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere ,Use a gage and check proper fuel pressure, 52--59 psi, key on engine off. Check fuel injector pulse. Any applicable trouble codes? You have good cylinder compression?

Posted on May 16, 2017

Testimonial: "Have spark, and good fuel pressure, how do I ck injector pulse"

  • jack layton
    jack layton May 17, 2017

    Use a noid lite.

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When you replaced timing chain, did you set cam and crankk in proper alignment? there are so many things,

Posted on May 16, 2017

Testimonial: "Yes but no change . I agree, figured I replaced parts one at a time I might get lucky, limited on test equipment. Code reader shows no codes"

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  • Buick Master
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Did you check the oil? This vehicle has a low oil sensor that will disable the ignition if more than a quart low. Check for blown fuel pump fuse. Check for bad fuel pump relay. Never replace this many parts without first performing an OBDII scan. The stored fault history is always your guide to part replacement. You have replaced a lot of expensive parts that you probably did not need. Always try the cheapest fixes first. OBDII scan is free at Autozone. GM vehicles are prone to Anti-Theft function that can disable the ignition (Not reading the chip in the key). The OBDII scan will show these problems too. Also reset the Rollover safety switch, it can disable fuel pump function.

Posted on May 16, 2017

Testimonial: "Thank you for responding. Good fuel pressure before and after replacing pump,but wife insisted she was told that was problem. How can I ck injectors, and what and where is the rollover safety switch"

  • Joe Stanton May 16, 2017

    I hate to say it but All 6 injectors don't just stop working, Do The OBDII scan. The fault history will tell what to do next. the rollover switch Is inside the cargo area, remove the interior panels for access.

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