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Wont start will crank but not turn over. Both fuel and spark…

Customer Question
Wont start will crank...

Wont start will crank but not turn over

Mechanic's Assistant: Have you checked the fuel supply? And are all the spark plugs working?

Yes both fuel and spark but I seemed to have issue with ecu and have replaced it I also have vag com and genuine ross tech cable

Mechanic's Assistant: What is the model/year of your Audi?

2003 Audi A4 1.8t

Mechanic's Assistant: Are you fixing your A4 yourself? What have you tried so far?

Myself

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

So far I have replaced Ecu checked grounds and wiring but I want to start from beginning and see if I'm missing something

Submitted: 4 months ago.Category: Audi
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Customer reply replied 4 months ago
This car was purchased as a no start needed TBA, since then we have accomplished 5 consistant starts but limp mode active during diagnosing limp mode the car went back to a crank no turnover .
Customer reply replied 4 months ago
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call.
Customer reply replied 4 months ago
Let me know if you need more information, or send me the service offer(s) so we can proceed.
Answered in 15 minutes by:
3/8/2018
Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago
Wolfgang
Wolfgang, Audi master tech
Category: Audi
Satisfied Customers: 5,219
Experience: Senior Audi Master Tech 15 yrs
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  1. I do need the vin # to get the factory information to assist.
  2. I do need a full vehicle scan log and post here please.
  3. when ignition on does the check engine light come on in the cluster?

Thanks

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Customer reply replied 4 months ago
WAULC68E93A135142
I have several vcds scans I can run a current one but due to battery disconnected may have several faults or I can send a older one.
Check engine does stay on.
Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago

old and recent one would be great!!

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Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago

did you replace the crank sensor ? that will cause your no start .

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Customer reply replied 4 months ago
but still got code
Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago

factory sensor or aftermarket?

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Customer reply replied 4 months ago
Bought at Napa 3 pin
Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago

i have issues of aftermarket sensors give fits!!

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Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago

i have seen wiring from the sensor connector to the ecu giving issues because the wiring of that harness has a shielded ground around the wiring to keep EMF signals to a minimum.

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Customer reply replied 4 months ago
We I wondered that. We feel as if we have a ground issue in the car. Have done the fuse test where we hooked up a light to the ground cable and ground of the battery, it stays on no later what fuse we pull. Also oil smells strong of gas. Spark plugs getting wet.
Customer reply replied 4 months ago
Any ideas
Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago

what is the coolant temp sensor reading key on engine off?

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Customer reply replied 4 months ago
Its reading 15 degrees Celsius.
Customer reply replied 4 months ago
log
Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago

what is the temps in your area?

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Customer reply replied 4 months ago
At time of testing I'd say it was about 55
Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago

ok compression test?

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Customer reply replied 4 months ago
0 compression, I do want to mention my cousin has the same exact car. 2003 Audi A4 it sat for a year. Ran codes, almost identical codes and zero compression then he said he put transmission fluid in his cylinders and went back next day and it fired up but after he replaced coil pack wires and fuel injectors cause like mine they were in poor condition so I tried the same no success he did find the cam gear broke that nub on inner portion of gear
Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago

sounds like bent valves. may have jumped time!!

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Customer reply replied 4 months ago
what would be the proper way to see if that is the issue, cause I have had it started and running but was in limp mode then shut car down, did some other maintanece and went back to start car as nothing out of ordinary happened at shut down nor anything happen since. And now suddenly no compression or start???
Audi Mechanic: Wolfgang, Audi master tech replied 4 months ago

borescope to get a visual. pull plugs and have the piston down and look in to see any contact with the piston.

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