The Thread Build (BuildUp:)

[The Big V]

As for ecu and grounds...check the ground strap from ignition coil to head (corner of valve cover)? Is it exposed?? You can take off and put some new shrink tube over...and check the grounds on the block...mine were nasty and had to be cleaned...i try to spray em w some wd40 every now and then to keep em clean and so they dont corrode again. I even sprayed wd40 on the grounds for my tail lights and it "solved" some grounding issue i was having back there (prob from using too much dielectric grease i discovered)...

Also check all your grounds and wiring?
http://faculty.ccp.edu/faculty/dreed...hset/index.htm

[macanic21]

Does anyone know where the 3 wires from the CPS are located on the ECU connector?

[macanic21]

Check all grounds. I had some minor conductivity between the power on pin 3 and pin 1 at the CPS. I wired 12V separately to the sensor. I disconnected the O2 sensors as well. Charging the battery tonight so I can try it again tomorrow....

[macanic21]

Car has been running with the CPS power feed rewired to the battery and now tapped into the yellow and black switch power that feeds the ECU. O2 sensors plugged back in and the car is running good. I am also back to running the C2 chip and for some reason, it seems to be running better... We'll see after I get some more miles on it.

The ECU i'm running is throwing a p1613. I believe due to the fact that it is out of an auto car.

[The Big V]

everything else sorted out? hows the thing been running?

did a quick search online and your theory seems good for why ya getting that code since a manual trans doesnt have the sensor like the auto trans.

Car has been running with the CPS power feed rewired to the battery and now tapped into the yellow and black switch power that feeds the ECU. O2 sensors plugged back in and the car is running good. I am also back to running the C2 chip and for some reason, it seems to be running better... We'll see after I get some more miles on it.

The ECU i'm running is throwing a p1613. I believe due to the fact that it is out of an auto car.

[911_fan]

You can recode the ECU via VAGCOM

http://img.photobucket.com/albums/v4...decodepump.jpg

[The Big V]

You can recode the ECU via VAGCOM

http://img.photobucket.com/albums/v4...decodepump.jpg

Thats super useful. Why is there a difference w some Cabrio coding vs Golf/Jetta? I've heard different coding for adjusting idle say for expl between later Cabrio (mk3.5) and wonder if 98-99 mk3's follow similar coding/blocks...? This is all in Bentley or different guide? I'm a vagcom noob and gonna try to setup on a netbook asap.

[macanic21]

^ wish I knew how to do all that stuff. If it sets the CEL I'll eventually try to figure it out. If not, I don't have that many spare hours.....

The car has been running great with the chip in this new ECU. I haven't driven it much yet but it has been through a few heat cycles and the idle control is great. We'll see if it screws itself up or not. I wired the CPS back to switched power so the problem is permanently fixed.

I can't wait to start driving this thing again. Looking forward to autocross this year! Gotta buy another set of tires, guess I'm going to go with the Nitto 555's again. The Prothane A-arm bushings seem really nice. The front end seems much more controlled and precise. I'm going to have it aligned and the camber set to -.5. I know thats not a lot but it still needs to not kill the tires as it will be mostly street driven.

My heater core blew up I think. Lots of fog out the vents. I bypassed it and haven't had a problem since. I bet that's a pain to replace....