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1990 pontiac grand am cold start

Vehicle is having issues on cold start. Replaced the fuel pump relay, can hear the click from relay from under the hood, and can hear the fuel pump prime and buzz. Once car is started it is fine and cranks up fine after it is warmed up. What other problem could it be? Is there a cold start valve or something?

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Most likely fuel pump pressure problem..

Posted on Jan 22, 2013

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  • Kevin Henningson Jan 22, 2013

    What psi does it have to be at? I read that 42psi is about what it needs to be at but I am not sure on that.

  • Adrian Jaramillo
    Adrian Jaramillo Jan 23, 2013

    base fuel pressure is measured key on engine off. specs should be 32 to 36 psi..

  • Kevin Henningson Jan 23, 2013

    cool deal!! Thanks! I will check it this weekend and let you know the results.



4 Suggested Answers

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SOURCE: 1999 Saturn SL2 DOHC Engine - Fuel pump not pumping fuel.

replace engine control module

Posted on May 12, 2009

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SOURCE: 2007 Jeep Wrangler Unlimited Crank-No Start. Replaced FP.

Hey Tim take a look at this, will this help ?
No Engine Crank Or No Engine Start Due To Electronic Lockup Of The WCM / SKREEM
This bulletin involves the replacement of the Wireless Control Module (WCM), and if
equipped, the replacement of the Electric Steering Column Lock (ELV). The WCM is also
referred to as the Sentry Key Remote Entry Module (SKREEM).
The customer will experience a no engine crank AND a no engine start condition. Also, the
remote keyless entry (RKE) system will not operate. This condition may be due to an
electrostatic discharge (ESD) from the ignition key into the Wireless Control Module
(WCM), causing the WCM to electronically lockup. This condition may occur more
frequently in dry and/or cold weather conditions where a sufficient electrostatic charge is
more easily produced. This condition is corrected by the replacement of the WCM
1. With the condition present (i.e. the vehicle in the no crank / no start condition), connect
the StarSCAN® scan tool to the vehicle.
2. Turn the ignition switch to the “ON” position, and power up the StarSCAN®.
3. If the WCM is electronically locked up, the StarSCAN® will display the WCM as being
“off bus”.
4. If the no crank / no start condition is present, and the WCM is “off bus”, then reset the
WCM by temporarily removing the IOD fuse (with the key out of the ignition switch),
wait for 10 seconds and then reinstall the IOD fuse.
5. With the IOD fuse reset having been performed, verify that the vehicle will now crank,
start, and run.
6. If the condition is temporarily corrected by performing the above steps, and if the part
number of the WCM is earlier than the part number of the WCM listed in the part
reference table in the Service Bulletin Parts Required Section below, then perform the
Repair Procedure.

Posted on Jun 24, 2009

  • 880 Answers

SOURCE: 91 camaro 5.0 5sp no injector pulse and no power to fuel pump

Using a multimeter check the wiring for power at the pump and at the relay. It sounds like a bad relay.

Posted on Jul 22, 2010

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25709493-cixqw12rkpkyukark0skpttp-2-2.gif Hope this helps

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