4 window hall sender. Where to find?

[MIDNITEAUDI]

Did a wideband conversion on my 2000 ATW and Unitronic is telling me I need a 4 window hall sender opposed to my stock one window. Being as the part numbers are the same for the hall sender (cam sensor) I'm assuming they're talking about another piece, maybe the metal clip that bolts into the end of the cam? Where can I find one which is supposed to be from a 2001+? Technical name for this part?
Thanks

[Mad Cow]

According to ETKA the sensor and impulse rotor (piece that bolts to the cam) are the same between ATW and AWM, and I believe that because my wideband swapped ATW has the original pieces.

[Seerlah]

Picked my replacement up from ECS. Type in "cam rotor". I would link it, but don't know how to copy and paste in this little device I am using.

[walky_talky20]

1-window: http://www.ecstuning.com/Search/078_905_234_F/ES284084/
4-window: http://www.ecstuning.com/Search/06B_905_234_A/ES280127/

I thought the 4-window version only came on the VVT engines (AWM and newer), but I could be wrong. I would think if the 4-window sensor were introduced on the ATW, then the part number should start with 058 instead of 06B.

[034Motorsport]

1-window: http://www.ecstuning.com/Search/078_905_234_F/ES284084/
4-window: http://www.ecstuning.com/Search/06B_905_234_A/ES280127/

I thought the 4-window version only came on the VVT engines (AWM and newer), but I could be wrong. I would think if the 4-window sensor were introduced on the ATW, then the part number should start with 058 instead of 06B.

I wouldn't necessarily trust the part number, even though that would be logical thinking. However, in my experience I've only seen the 4 window on the VVT cars as well.

However, don't ATW have VVT? Don't all ME7 cars have VVT?

[walky_talky20]

Nope. On the 1.8T, VVT was introduced (along with Wideband sensor, push-down coils, and revised catalytic converter) for the 2001 model year to secure ULEV status.

[034Motorsport]

Well I'll be a sunuvagun. You're right; small port, non VVT, narrow band, 058, drive by wire. No wonder people always say ATW's suck!

[walky_talky20]

^Pretty much. But reasonably easy to go to AWM spec. So that's nice.

[MIDNITEAUDI]

Great! thanks for clearing that up

[Mad Cow]

Yet my ATW runs perfectly fine with the original stuff... I'm confused now. Unless the ECU already has code to adapt to both trigger wheels I don't see how this is possible.

[walky_talky20]

^Do you know which rotor version your car has installed?

[Mad Cow]

^Do you know which rotor version your car has installed?

Haven't checked but it came out of an '01 passat so it seems like a regular ATW, I'll check tomorrow when I get a chance.

[MIDNITEAUDI]

Just to clarify I did a wideband swap and am now using an AWM ecu so that is why I need the 4-window cam rotor

[Mad Cow]

Just checked and my ATW has the 4 window rotor, so unless this is an '01 passat thing I would assume all ATWs have it. Midniteaudi, check yours, maybe it's already the right one.

[MIDNITEAUDI]

Yep just checked it already is the 4 window piece.
I keep getting timing over retarded and cam position sensor incorrect alignment codes. Unitronic tech thought it was because I didn't have the four window rotor.
Hmmm, wonder why I keep getting those codes?

[Mad Cow]

Do you have the VVT solenoid resistored out? What are the actual DTC numbers? The only code I got with a resistor in place of the solenoid is advance setpoint not reached P0012.

[MIDNITEAUDI]

yes VVT is resistored out. Ill have to get back to you on the exact numbers.

[MIDNITEAUDI]

its code 17748 Cam Position Sensor Incorrect Allocation
G40 Engine Speed Sensor G28
Its not related to the tune because I switched back to stock for emissions and it still pops up.

[Mad Cow]

That's odd, the code shouldn't come up with just an ECU change. Generally it would be caused by either the chain or belt being mistimed or a bad crank/cam position sensor.

[MIDNITEAUDI]

That's odd, the code shouldn't come up with just an ECU change. Generally it would be caused by either the chain or belt being mistimed or a bad crank/cam position sensor.

Ive tried two cam sensors.
Wonder if I mistimed it when I put the timing belt on? how far off would it have to be? I was getting a timing overretarded code too. man I must be off by a tooth.

[MIDNITEAUDI]

Maybe its time for an IE adjustable cam gear

[Mad Cow]

An adjustable cam gear won't solve your problem, either one of the sensors is bad or it's mistimed. Could be a bad crank sensor, but I doubt it if it runs fine otherwise. Check the timing belt and chain before you go replacing things. If the timing over-retarded code is what I'm thinking it is (give me a DTC again to confirm) it's from VVT not being coded out.

[walky_talky20]

I doubt that is necessary, unless you've shaved the head significantly or have aftermarket cams. Let's check belt timing, shall we?

[MIDNITEAUDI]

I doubt that is necessary, unless you've shaved the head significantly or have aftermarket cams. Let's check belt timing, shall we?

Ya I'm gonna check and see if the timing marks line up and the condition of the belt. I'm just saying if Im getting in there to change a belt why not put a cam gear in. Might go to IE manual tensioner setup too. Future proofing.

[MIDNITEAUDI]

I also get an oil pressure light. I have an external manual gauge to confirm pressure. what should pressure be at? low pressure could mess up the chain tension right?

[MIDNITEAUDI]

found this
http://wiki.ross-tech.com/wiki/index...8/P1340/004928
I'm gonna check all this stuff.

[MIDNITEAUDI]

[MIDNITEAUDI]

Looks a little bit retarded. would this be enough to throw the code you guys think?

[walky_talky20]

I can't see anything...bro.

[MIDNITEAUDI]

I think it is properly timed. Doing research on here I think my problem has to do with my oil pressure not being high enough to apply tension to the cam chain. Gonna take some oil psi measurements tomorrow. thanks for all the help.

[MIDNITEAUDI]

oil pressure readings
cold ide 75 psi
warm idle 20 psi
2k 55psi
3k 80 psi
4k 90 psi

Ive seen a few different specs on what oil pressure should be but from what I've seen this is within spec. So I still have an oil pressure light immediately after i get above 2k cold or hot. stays on. And I also get the incorrect allocation code between cam sensor and crank sensor. Valve train doesn't make noise like it is starving for oil or anything.

[walky_talky20]

Those oil pressure numbers are fantastic. If you are getting an oil pressure warning, it is probably due to a bad oil pressure switch. The logic for the oil pressure warning is looking for the pressure to be below 23 psi and above 1500 RPM at the same time. If that ever happens for more than .5 seconds = oil pressure warning. As simple as that.

Based on your readings, it doesn't look that is actually happening, so a faulty pressure switch is most likely in your case.

Can you post photos of your belt timing and/or cam timing? That correlation code almost always has to do with improper mechanical timing.

[MIDNITEAUDI]

Ok thanks, I'm really not concerned about the light right now if I am within spec. I just want to figure out the incorrect allocation code. I'll take some pics and mark the timing marks this time.

[MIDNITEAUDI]

Update:
Ended up replacing the impulse rotor, with a new one (same part # 4 window) and torqued it to 18ftlbs. Drove it all day and no light or code present in DTC memory.