[s-cars] //S4cylinder (still striking out) 1.8 coil mod.

[AUDIJIM at aol.com]

Today was a nice day because the weather cooperated with my trouble shooting 
needs. I wish there was more good news other than the mild weather we are 
having today in South Jersey.

I spent some time tracing the 5 wires from the ECU to the POS connectors. I 
checked resistance on all 5 wires from pin locations on the ECU 55/1, 55/2, 
55/20, 55/21, 55/23. Every wire checked out the same. No fluctuation with a 
wiring harness shake test. Simply put, the wires are good. The two 3-pin white 
connectors for the coils all check out good. These connectors are for + power to 
the coils. I checked voltage at the POS by back pinning the connector while the 
engine was running. Every wire is getting good voltage to the POS. I once 
again tried my spare coil pack from the spare AAN, just to make sure that I don't 
have a #4 coil that is bad and new.  I just might. Maybe I have a bad coil on 
my spare coil pack and also a bad brand new coil on the other. It is 
definitely ignition. A couple of weeks ago I was driving home from Philly with a 
freind in another car. He wrote me the other day and said that he smelled a lot of 
fuel odor when I accellerated past him from a traffic light. (Fuel but no 
Spark/Ignition) At this stage since I have clearly found power to the POS and it's 
somehow getting lost between the POS and the coils. I had brand new RPM ref. 
sensor and Crank Poss. sensors to install just to see if it would make a 
difference. It didn't. One person suggested I check out the Cam Position Sensor 
(Hall Effect) But just like the RPM and Crank sensor's I replaced, I do not 
believe that this would make a damn bit of difference to #4 cylinder specifically. 
I also double checked the flywheel teeth to make sure they were all there, and 
they were.

I am going to do the 1.8 coil mod. I am done spending big money for the AAN 
coils and POS's. I can do the entire 1.8 coil mod for a lot cheaper than the 
cost of one POS or coil. Since I already have the coils, I have already ordered 
the parts for the mod. I will install it on my spare engine first as a test 
fit and then transfer it to my S4. Besides the 115 L coil from the 1.9 engine, 
what is the P/N for the V8 S4 coils. The write up on how to do this mod states 
that they can be used, but it doesn't give a P/N for them. I have 5 coils of 
the 115 L flavor, and I have 5 orange coils that I think are the correct V8 S4 
coils. My ETKA only goes up to 2001.

Jim