Question about Audi Q7

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2007 Audi Q7. Engine tumbling but won't start until after 3 or 4 attempts. Parked the vehicle, did not use for several weeks, ordered glow plugs and changed them. Now vehicle won't start at all. Direct wired the glow plugs, heated for 8 to 10 seconds and the vehicle started right away. Got the diagnostic scan done by the Audi company and the starting fault is not being picked up. What they have told me to do is to change the starter and the intake manifold flap motors. My immediate problem is that the vehicle cannot start in normal fashion, but if the glow plugs are manually heated the vehicle will start and run normally. Can't figure out how changing starter and flap motors will help considering that once the vehicle starts, everything else is normal. Thankful for nay suggestions.

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  • h_lalla Aug 05, 2011

    Thanks so much for the suggestion but already checked the glow plug relay (R1), the other relays, fuses etc. The hard starting problem exists only on mornings after the vehicle has been parked overnight. Once started in the morning, (via what ever means) there are no further problems during the rest of the day. Mileage on the vehicle is 62182 km. Current is not being received by the glow plugs for them to heat up (except if they are direct wired and manually heated).
    Will be thankful for any other suggestions.
    Lalla.

  • Hassanal Sufri Hassan Dec 20, 2012

    I had a similar problem with my Q7 having hard starting early in the morning. Having only done 80k km on the counter. Any other solution to resolve the problem that you may suggest.

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  • Bethany Cole Feb 12, 2019

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Check and replace if necessary the glow plug relay R1 placed in the fuse & relay box in engine compartment. See the picture below:

2007 Audi Q7. Engine tumbling - tdisline_810.jpg

Posted on Aug 03, 2011

  • Hassanal Sufri Hassan Dec 20, 2012

    I had replaced the relay, but still problem still persist. What might be the other causes?

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You can try getting help from the company, they may guide you with details on how to fix these issues

Posted on Jan 26, 2019

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Posted on Aug 28, 2018

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Do you have fuel pressure needed ? You got 2 pumps one for start and one for const. Delivery of all ok check of 12v come to engine injectors . Those engines had a common problem on engine ecu

Posted on Jul 02, 2018

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