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Old Jun 29th, 2014, 12:55 PM
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Yoyoing & poor startup

Hello. I've got this kangarooing or yoyoing at high revs and my car occasionally does not start up well! I've replaced the CAT serviced the car and replaced the bypass valve! Please can someone help with this. Many thanks
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Old Jun 29th, 2014, 02:01 PM
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It sounds to be a fuel system fault, look into your fuel injectors and your fuel pressure reg, it sounds like there is a possible failure in there.
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Old Jun 29th, 2014, 04:40 PM
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Hi. My fuel pressure reg was replaced last year. Injectors have been cleaned with special fluid car still the same. I think my fuel pump makes a constant whining sound now! My black fuel vent valve in the engine bay has recently starting making a ticking noise after the car has been start for screw minutes. Thanks
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