When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hi everyone,
I have one of the strange situation
so I have Audi 80 B4 2.8 AAH 1994 year, On my way home engine stop working and after that I can't start engine, I try to check every single detail responsible for engine start:
1) crankshaft sensor,
2) camshaft sensor,
3) Flywheel sensor,
4) Ignition Module
5) coils
6) engine control module.
also check all fuse box and relay every detail is in working condition, but I can't start the Engine
after all I remove all the sponsors and one by one install on a different car, every single one is in working condition, even engine control unit works fine
Please help me to solve this problem, I don't have ideas any more.
unfortunately fuel pump also works very well, pressure is about 5-7 bar. when I try to start engine there is no spark in spark plug, this is the main problem what I can't solv
If your CEL is working..try doing the diagnostic codes..see the link: 12v Pages - Maintenance
You have a no spark..so something is not giving information to the OBC or you have a bad coil pack..which you checked...so see if you have any codes stored?
Already did, no stored error codes in ECU.
I had conversation with several specialist about it, but they have no idea what is wrong with system.
I try to search ECU wiring diagram,to test connection between sensors and ECU, but didn't find any, if anyone have ECU wiring diagram for Audi 80 (B4) 2.8L AAH 1991-1995 year please help
Take a look at the wiring harness..the grounds on the intake manifold and the plug connectors on the firewall. Could be something got swapped as the camshaft and crank sensors plugs look the same.
On this link an idle control valve caused no start problems as well as some crushed wires.
all marks are in position, I check it several time.
on the weekend I'll try to find if there is any crushed wires.
Can anyone tell me, ignition switch can be cause of this problem????
03-29-2017, 12:04 AM
Audi 80 (B4) 2.8 AAH Engine stars problem
