How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Matt Your Own Question
Matt
Matt, Mechanical Engineer
Category: Audi
Satisfied Customers: 21616
Experience:  BEng hons Mech engineering, in auto industry 22 years
12772297
Type Your Audi Question Here...
Matt is online now

I have an Audi A4 TDI 2.5. Age 2003 low KMs (74000). Beautiful

Resolved Question:

Hi I have an Audi A4 TDI 2.5. Age 2003 low KMs (74000). Beautiful car like new. Just took it to ski resort for a few days. Very difficult to start in cold, and lots of exhaust smoke when she eventually started. Any ideas how to cure, as I am planning another ski trip. Thanks
Submitted: 1 year ago.
Category: Audi
Expert:  Shantal-Mod replied 1 year ago.
Hello,
I'm Shantal and I'm a moderator for this topic.
I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.
I was checking to see if you had already found your answer or if you still need assistance from one of the Professionals.
Please let me know if you wish to continue waiting or if you would like for us to close your question?
Thank you,
Shantal
Customer: replied 1 year ago.
Hi Shantal, thanks for your message. I have not found a solution, so if you're able to find someone that can help I'd be grateful. Many thanks, ***** *****
Expert:  Shantal-Mod replied 1 year ago.
Hello Edward,
Thank you for getting back to me and apologies that you have not received an answer yet. We have a range of Professionals online all the time. However specialties differ, and we are searching for the right professional to assist you.
Should you wish to close your question and reverse your charges at any time please let me know.
Thank you for your patience,
Shantal
Expert:  Matt replied 1 year ago.
HelloI'd check that you're getting full power to the glow-plugs, they pull a lot of current so take care when checking but see if the relay is clicking when the ignition is turned on first and also check the fuse if this is OK check to see if the engine earth strap is also OK.If the plugs haven't been changed in the last 20K then they may have to be replaced.You can test the glow-plugs with a multimeter by measuring the resistance across the plug ( between the power connection and the body) it should be around 4-8ohms if its tending to infinity / open circuit the plug is faulty or by using a clip on current clamp, either on the supply wire to glow plugs or onto engine earth, with glow plug light on you should see 15-20amps for each glow plug fitted, 4 cylinders would be approximately 60-80amps.If the EGR valve is stuck open then this too can effect starting so try disconnecting it to see if this helps or changes anything Could also be an injector leaking fuel back through the overspill pipe, so not getting enough fuel pressure to tell ECU to fire the injectors, this is trickier to find and you’ll need the garage to do a ‘run back’ test to identify which one is the issueLastly it’s also worth considering fitting a new fuel filter as if only slightly blocked this can lower fuel supply pressure and choke the main pump, the pump will be more sensitive to this when its cold as diesel thickens considerably with low temperatures.
Matt, Mechanical Engineer
Category: Audi
Satisfied Customers: 21616
Experience: BEng hons Mech engineering, in auto industry 22 years
Matt and other Audi Specialists are ready to help you