I am the one trying to fix this car. Here is the story.
The car sat for about a year before I bought it. The battery was not in it. I put a battery in it and tried to fire it up. The car would crank but not fire. Fuse 10 was blown. Put in a new fuse and as soon as i turned the key it popped. Turns out that is the power supply for relay 428 under the hood. Fixed some wiring issues on that relay. Car would barely idle, traced that back to a cracked plug. Replaced. The car idles decently now. The odd time when we start it the secondary air pump kicks in, but thats hit or miss. I disassembled the throttle body, gave her a good cleaning, no difference. Took black cover off, motor turns freely. put power to the two terminals for the motor (very quickly) and it moves the butterfly valve. When tyval and I have it hooked up the the vag, i moved the butterfly by hand and the values changed. Went to the block for the go pedal, put it to the rug, values changed. Just got back from banging my head against the wall in the shop, and now if I step on the go pedal, i can get it to rev up to about 2800 RPM (takes 30 seconds to get there) by stepping on the pedal. If i have someone sit in car and hold it to the rug and i push the butterfly open with my finger i can get it up to about 4 grand then it sounds like it hits a rev limiter. Start car with intake hose off throttle body and there is no movement of butterfly. A friend had his 2002 jetta there, and you can here a whine come from his TB, and even key on motor off you can hear the butterfly move when he steps on the go pedal. Mine is quiet and no movement.
All fuses good, Service engine light on, EPC light on. (i cant tell you the codes, gotta talk tyval into comin over again)
The closest throttle bodies i can find are Montreal QC, Tampa FL and Houston TX and the cheapest is 250ish and non returnable. I dont really wanna spend the coin if it isnt the problem.
This was the p1517 code from the log...
17925 - Power Supply Relay for ECU (J271 or J363): Electrical Malfunction
P1517 - 35-00 - -
and from the adaptation attempt....
20:03:09 Group 060: Ignition on but engine not running
10.0 % Throt Sens 1 8-60%
83.6 % Throt Sens 2 60-94%
1 Adap Step Cnt 0-8
ERROR Adapt Cond ADP OK
Now for the questions if i may, and i thank everyone in advance. I have searched and searced online for the answers. I know a Vdubb mechanic but he cant figure it out either.
Resistance value for motor in TB? i came up with 3.8 ohms, but that may have been Mohms, Kohms...who knows...my concussion from banging my head against the wall is taking its toll....
Dont quote me on the wiring colors here, but i do have the diagram at the shop, but i believe Lilac/black and White are the TB motor circut, if i unplug the TB, or probe the wiring what should the voltage be? 0 at idle and 5 at WOT? i came up with next to nothing, maybe .1 to .4 volts, but now that i think about it, im not sure if i had the meter set to ac or dc.... again with the concussion..
What does relay 428 control? its on the firewall in engine compartment.
Maybe I am overlooking the simple things... Any recomendations?
I thank you in advance,