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Bryan
Bryan, Technician
Category: Audi
Satisfied Customers: 381
Experience:  Four years experience diagnosing and repairing Audi vehicles
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Audi A4 Quattro: I have a 1999 audi a4. no ignition fire. replaced

Resolved Question:

I have a 1999 audi a4. no ignition fire. replaced crank and cam sensors still no fire any ideas
Submitted: 1 year ago.
Category: Audi
Expert:  Bryan replied 1 year ago.

Hello

My name isXXXXX will be glad to assist you today in answering your questions.

 

If crank and cam sensors are new and still no fire, I would be looking at replacing the ecm

Atleast install a test one the anti theft system will allow it to start but will shut it right back off.

 

The coils on this model were junk and upgraded several times, and I have seen all four coils fail at the same time and give a no spark issue.

 

Customer: replied 1 year ago.
I have the 2.8 non turbo model awd
Expert:  Bryan replied 1 year ago.

On the driver side of the engine all the way back under the cowl is a black box

has 4x 8mm bolts that hold it down, inside that cover is a fuse for the ecm

I would start there

Customer: replied 1 year ago.
Ok finally got the man to release my car, I will have it towed here tomorrow and I will look at the fuse. Sorry it took so long guy was being a pain.
Expert:  Bryan replied 1 year ago.
Just let me know I will be here
Customer: replied 1 year ago.
I checked in the box. There is no fuse. I have no rpm pulse at all. It cranks over fine and has fuel pressure any ideas?
Customer: replied 1 year ago.
Just checked codes with a scanner. Its only code was camshaft position sensor
Expert:  Bryan replied 1 year ago.

Camshaft code sets for either stretched timing belt, bad connection to cam sensor or bad sensor.


Without crank sensor reporting your not going to have any fire, check the front of the crank sensor see if it has been hit by something, seen them get crushed before

Customer: replied 1 year ago.
The guy told me he put a new crank sensor. but I can not find it. where is it? He also said he put a new cam, but I found it and its not new.
Expert:  Bryan replied 1 year ago.

Then I doubt he put a new crank sensor in the car, the cam sensor is easy takes about 15 mins, but the crank sensor takes about 25mins

 

Here is a link with pictures showing the repair

http://www.a4mods.com/index.php?page=webcontent/pages/enginespeedsensor.html

 

 

Customer: replied 1 year ago.
I ordered a new cam and crank sensor. If I have any more question after install I will contact you.....Thank you
Expert:  Bryan replied 1 year ago.
Your welcome please let me know how things turn out
Bryan, Technician
Category: Audi
Satisfied Customers: 381
Experience: Four years experience diagnosing and repairing Audi vehicles
Bryan and 2 other Audi Specialists are ready to help you

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Bryan
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Four years experience diagnosing and repairing Audi vehicles