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 sprinkles08 Your Own Question
sprinkles08
sprinkles08, ASE Certified Technician
Category: UK Car
Satisfied Customers: 21601
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
9825021
Type Your UK Car Question Here...
sprinkles08 is online now
A new question is answered every 9 seconds

I have an audi a6 2.4L quattro that will crank but wont

Customer Question

I have an audi a6 2.4L quattro that will crank but wont start
chsnge plugs, coil pack, fuel pump,fuel filter,fuel regulator, vacuum hoses.cleaned MAF
used to run very rough now does run.
Submitted: 1 year ago.
Category: UK Car
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

There are may things that will cause a no start condition. It sounds as if you ruled out most of the fuel delivery system, although fuel contamination could be an issue if you didn't take a sample to rule out fuel.

You may have a cam timing issue, lack of spark, or it's possible that the fuel pump isn't running due to a loss of power or ground.

What P codes were set?
Have you checked for spark and fuel pressure?

Customer: replied 1 year ago.
I hear the pump working. Currently cleaning the throttle body which looks ok. Exhaustion breather hose was loose. I assume fuel is not contaminated as its the same as in my other car. Fuel injectors have been cleaned all working.
Expert:  sprinkles08 replied 1 year ago.

Have you checked for spark?

Customer: replied 1 year ago.
I assume spark because it does try o start why the key is turned but dies soon after the key goes to neutral/on position
Expert:  sprinkles08 replied 1 year ago.

The engine actually runs (starts and dies) or you're just hearing the starter crank the engine?

Customer: replied 1 year ago.
Turns briefly then dies
Expert:  sprinkles08 replied 1 year ago.

The starter engages and turns the engine or the engine actually starts and dies?

Customer: replied 1 year ago.
Engine struggles and dies
Expert:  sprinkles08 replied 1 year ago.

What P codes did you find setting?

Customer: replied 1 year ago.
P300
P304
P305
P30?
Expert:  sprinkles08 replied 1 year ago.

What was the condition of the spark plugs when they were removed?

Customer: replied 1 year ago.
Plug 4 slightly oily rest dry. Dark no significant rsidue
Expert:  sprinkles08 replied 1 year ago.

Are you able to monitor data?

Customer: replied 1 year ago.
Not anymore because the engine needs to be running for my scanner to connect
Expert:  sprinkles08 replied 1 year ago.

All that should be necessary for communication is having the key on.

Customer: replied 1 year ago.
Ok I will check that
Expert:  sprinkles08 replied 1 year ago.

Ok.