Cam sensor sync

Jeffrey Technician California Posted   Latest   Edited  
Resolved
Driveability
Electrical
2002 Volkswagen EuroVan GLS 2.8L (AXK) 4-spd (01P)
P1347
Codes

Should the two cam patters be right on top of each other in terms of time. the information I have states that the both cams should cut to ground at the same time as the crank. so the cams should be synced and lined up. Out of lack of experience I am asking is this far enough off in time that timing cover removal is warranted. The image is both cams I know the voltage scale is off slightly more concerned about the ms. 

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Glenn Owner/Technician
Texas
Glenn
 

Hello Jeffrey, According to the code information this is an issue with the engine speed, checking (RPM) sensor. There are issues with the trigger wheel possibly moving and this is why your pattern is slightly off. If the signal were missing, the engine would not run. Reference All Data P code chart information for SAE P1347/ VAG 17755. Hopefully someone has a pattern of a known good one to…

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Rudy Technician
California
Rudy
 

Looks like its normal(courtesy of Hans Jorgensen via Rotkee)

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Jeffrey Technician
California
Jeffrey
 

No its not normal left to right (ms) is off. up and down is because the scaling it slightly off on the tool not the car just like the one you have. thanks this pattern confirms mine is off.

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Glenn Owner/Technician
Texas
Glenn
 

Hi Rudy, The pattern you submitted looks normal, his does not.

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Jeffrey Technician
California
Jeffrey Resolution
 

Cams are off timing.

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Obie Technician
Washington
Obie
 

If both cams are off it suggests the lower chain has issues. Doing the complete job is a proper repair, and kinda spendy. Have a talk with the owner to make sure he is willing to go the distance.

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Jeffrey Technician
California
Jeffrey
 

Just one cam is off. The Rest is not up to me.

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Hans Technician
Utah
Hans
 

Note the waveform is different with the adjusters plugged in or unplugged. When they are unplugged, they should overlay each other perfectly. I believe the exhaust adjuster is either on or off, and only retards. The intake is duty cycled and advances. diag​.​net/msg/m2xeo268pp…

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Helpful
Jeffrey Technician
California
Jeffrey
 

Ill have to look and see if those adjusters are plugged in wrong hopefully having different color wires that can be looked up in a wiring diagram. I’ll see if someone wants to check the wave form when they are unplugged. The trouble tree I was working with didn’t mention that. Unfortunately/fortunately the 10 minutes I spent hooking up the lab scope was disapproved of so ill just be staying away…

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Michael Technician
Indiana
Michael
 

Hi Jeffrey, I hate that. Customer declines the next test needed for confirmation. I ask myself “Why is the car even here?” I could have given you a guess over the phone. Sometimes people are aggravating.

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Jeffrey Technician
California
Jeffrey
 

Oh I wasn’t talking about the customer. Doesn’t seem like the place to get into the discussion was just saying i won’t be looking into this further.

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Obie Technician
Washington
Obie
 

There is an old saying “ If it isn't written down it does not exist” This especially applies to flat rape repair orders!!!

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Jeffrey Technician
California
Jeffrey
 

This is why I decline 80% of the calls I get for my personal business. They can’t figure out a problem and don’t want to pay to figure out the problem. I’ll probably end up only offering mobile programming services as the demand is high. Now with the security on new cars requiring more knowledge for even the simple things like a quick learn after a transmission replacement demand is even higher.

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Agree
Glenn Owner/Technician
Texas
Glenn
 

Hi Jeffrey, Can't when them all. Maybe a parts person with their $30.00 hand held scanner will sell them $500.00 worth of parts they don't need. Customers like this are becoming more common these days.

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Jeffrey Technician
California
Jeffrey
 

It wasn't the customer at issue but the parts cannon begins the 30$ scanner was fired before the car came in had all new sensors in it.

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Elon Owner/Technician
North Carolina
Elon
 

Looks like you are out of time just a little bit.

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Jeffrey Technician
California
Jeffrey Update
 

One last reply as the problem is now fixed, this ended up being the cam shaft actuators when the timing cover was removed it was found that the timing chain was correctly in time ended up pulling the camshaft actuator’s back out after putting it back together and replacing them must’ve been some leak by causing camshaft phasers to apply.

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