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  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Tue Jan 30, 2018 5:08 pm   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Compression is up! Engine was cold in no-start condition.

Front to back
Cyl 1: 175psi
Cyl 2: 200psi
Cyl 3: 200psi
Cyl 4: 200psi

Comment: the plugs were fouled with soot, maybe soot in the bo ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Thu Jan 25, 2018 5:03 pm   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Added to the last message, the audi is spitting of piles of smoke. So much so that there is a nice soot deposit on the wheelie bin sitting behind the exhaust. I put it down to an incorrect air fuel mi ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Thu Jan 25, 2018 4:53 pm   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Update from my other thread:

Confirmed the Cold start valve and injectors working.
Removed air filter, and heater bypass valve

The car ran but could cut out easily - like releasing the throt ...
  Topic: ACE 16v ECU swap
EightyWay

Replies: 5
Views: 1495

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Mon Jan 08, 2018 11:44 am   Subject: ACE 16v ECU swap
Actually, the ECU seems fine. I resoldered every connection which took a while. I got the car running this weekend!

Confirmed the Cold start valve and injectors working.
Removed air filter, and h ...
  Topic: ACE 16v ECU swap
EightyWay

Replies: 5
Views: 1495

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Thu Dec 21, 2017 10:21 pm   Subject: ACE 16v ECU swap
Im going to crack open the ecu case and check for dry solders under the microscope.

I read somewhere about the immo delete, I guess that could be applied to the replacement ecu.
  Topic: ACE 16v ECU swap
EightyWay

Replies: 5
Views: 1495

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Mon Dec 11, 2017 2:59 pm   Subject: ACE 16v ECU swap
Hi, I have a b4 with and ACE 16v engine with an immobiliser. Can I swap ECUs from a donor car or is there an immo delete or Ross tech procedure to marry the new ecu?
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Mon Dec 11, 2017 10:58 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Ok, so I replaced the membrane in the fuel distributor. I didn't use gasket seal to stick it in place as some guides suggest. I also had queries about my Airflow meter which I may have gone out of spe ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Sat Nov 18, 2017 11:13 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
So my next step is changing the diapraghm in the fuel distributer. I'd rather not spend 300 on a rebuild without knowing 100%. If it is perforated at least it will be an improvement. I'll clean as mu ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Tue Nov 07, 2017 9:19 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Fuel pressure tests were a disaster. Leaks went everywhere, returning the kit! Next step is a visual inspection of the metering head and determining if the plunger is functional.
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Sun Nov 05, 2017 12:10 pm   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Compression cold:
Cyl 1: 130psi
Cyl 2: 150psi
Cyl 3: 150psi
Cyl 4: 180psi

Are these ok?
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Fri Oct 27, 2017 7:58 pm   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
So, I had another go today. Same old no-start. I was lazy and didn't tighten the clamps on the michelin man intake boot. I had sprayed starting fluid into the intake. The boot blew straight off and th ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Thu Oct 26, 2017 8:45 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
So I came back from 2 weeks away. The car is in a no-start condition. Interesting is that there appears to be some form of detonation at random moments (this might be the correct description).

It m ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Thu Oct 05, 2017 8:16 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Yeah, I got stuck on a roundabout during rush hour this morning. I was pumping the throttle so hard it broke off! The car was similar to before running really rough at cold. At the roundabout I was cr ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Tue Oct 03, 2017 9:28 pm   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
RESOLVED:

I had a clear plan of action this evening. Definitively rule out the ECM coolant sensor and do what tests I could on the accumulator/metering head.

Oddly the car started 1st time - act ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Tue Oct 03, 2017 8:15 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
OK...the accumulator. I have one in my fuel tank P/N 0438170052. There is also a fuel pressure regulator on the metering head. I assume the only way to test these is to pressure test the system.

M ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Mon Oct 02, 2017 7:33 pm   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
OK, I took some measurements of the various sensors/valves on my CIS ACE engine. Some measurements were taken when the engine was warm. Yes it was a pig to start again but ran ok after 20 minutes afte ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Mon Oct 02, 2017 12:30 pm   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Thanks, I might just have that 204 page pdf! One thing I have on my side is a working scantool. Each sensor throws a code when disconnected. I am working with the assumption that the ECM is good and t ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Mon Oct 02, 2017 8:04 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Update: From what I can gather CIS systems which use sensors also have a "limp mode" when the sensors are disconnected. As mentioned earlier in thread I disconnected the CSV with no effect, ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Thu Sep 28, 2017 11:08 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
It hasn't thrown up any codes since with respect to the idle. It may be something that is happen only on the cold start cycle.

It has become clear that it is going to find someone with the diagnost ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Mon Sep 25, 2017 8:22 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
This morning he car was very rough until it hit 90. Any throttle input would cause it to stall. Then, as it reached 90 it smoothed out. I was running a live feed. I think I need to get a full unders ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Sat Sep 23, 2017 9:16 pm   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Ok, the mechanic said it was the ISV, but the car was behaving in his presence. Fortunately, I had a spare with me when I went to collect the car, tried it, and, no improvement. But, now we could repr ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Thu Sep 21, 2017 9:36 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Yes, the one on the airbox.
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Thu Sep 21, 2017 8:56 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
I can get the mechanic to take a look at fuel pressures - I think he has a kit. The G62 is also at the rear of the head on the 16v, white connector. This is the one I cleaned.

Regarding the fuel sy ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Thu Sep 21, 2017 7:55 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Update: Removing the cold start connector did not have any effect other than making the car harder to start. The car cut out as it did before. I got it running by keeping it at 1500rpm until warm/hot ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Wed Sep 20, 2017 5:57 pm   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Codes:
00537 - lambda (oxygen sensor) regulation
08-10 - Control limit surpassed - Intermittent
---------------------------------------------------------
Which sensor does the ECU use - I am gett ...
  Topic: Audi 80 ACE 16v: Good when hot - Poor when cold
EightyWay

Replies: 30
Views: 8215

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Wed Sep 20, 2017 8:11 am   Subject: Audi 80 ACE 16v: Good when hot - Poor when cold
Hi, I have a recurring problem with the running of my Audi 80 2.0 16v ACE engine. It ended up in a no-start condition and ended up at the garage. The garage correctly diagnosed a worn distributor roto ...
  Topic: oil leak
EightyWay

Replies: 4
Views: 4258

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Mon Sep 18, 2017 3:42 pm   Subject: oil leak
My leak came from the oil cooler o-ring in the end. I have a rear mainseal ready for when the clutch eventually goes.
  Topic: water leaks into car
EightyWay

Replies: 32
Views: 26465

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Sat Sep 16, 2017 5:10 pm   Subject: water leaks into car
+1 for the sunroof water ingress on my side. I'll give your grease fix a go!
  Topic: Audi 80 ACE 16v coil
EightyWay

Replies: 0
Views: 2294

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Sat Jul 08, 2017 2:58 pm   Subject: Audi 80 ACE 16v coil
Hi, I recently had my coil die on a roundabout during rush hour. Stopping me dead in my tracks. One of the previous owners had swapped the electrical larger connector (on a separate amplifier) to the ...
  Topic: oil leak
EightyWay

Replies: 4
Views: 4258

PostForum: Series 3 and 4: 80, 90, Coupe, Avant, S2, RS2   Posted: Sat Jul 08, 2017 2:48 pm   Subject: oil leak
As at the back of the engine block leading you to think you had a rear main seal leak?
 
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