[mikebartusmc]

Hi Guys I guess I celebrated too soon
After a few start stop cycles I had Codes P0011 & P0016 codes blow again the engine seems to run fine but at this point Im skittish in what I know. I checked Haynes manual for OHMS resistance specs for CPS & CKPS and they only listed the CKPS range (486-599) not CPS?
So I put in a Hyundai OEM CKPS and tested the OHMS resistance and this one was in range 514 OHMS (486-599) so replacing that sensor eliminated the P0016 code Yeah.

However, the CPS code is still on (P0011) so I found an OEM CPS Hyundai sensor and tested the OHMS resistance and it was @ 933 OHMS. I don't know if this is correct or what the range should be? {2006 Hyundai Tiburon GS 2.0L engine} The previous sensor was an after-market and the OHMS resistance reading was at 455 OHMS resistance way lower than the OEM one @ 933.

I cant find anywhere what that CPS spec for Ohms resistance should be? or how to tell if thats the issue or If I have problems with the CVVT unit? I did take it apart and clean it and believe I assembled it correctly, its not that complicated
Im wondering if the CVVT unit is stuck in over advanced and wont return is that possible? Or Timing chain off again?

Thank you for your wisdom

Mike
PS: Some pictures below on my volt readings coming out of the wire harness CPS @ 800rpms running and CVVT breakdown. I also replaced OCV and tested the old and new one and both seemed to work with 12V-actuation and had #7 Ohms resistance on both

 

[Tiberius]

According to the FSM, both the crankcase position sensor and the camshaft position sensors are hall effect style pickups. Point is... I'm not sure there is any real validity to measuring the resistance across the sensor. I'm no hall effect expert, and I'm sure you could potentially tell if one is dead shorted dead. But other than that, I'm not sure there is anything to be gleaned from a simple resistance measurement. It's not like taking a resistance measurement across a variable reluctance coil type pickup.

Are you able to put a scope on the outputs while the engine is running? You should see a squarewave output from both of those sensors.

I've never done it and I'm just tossing out ideas, but maybe I can at least get a conversation started?

 

[mikebartusmc]

Ok thank you Tiberius....I can borrow a scanner to see from a friend however Im wondering if the CVVT cam phaser is stuck open and wont move back? I did order a newer one and will disassemble the existing one to see if I can advance/retard it with compressed air. Dreading the hours of work having to disassemble again

I do appreciate all the feedback Im at at a point of major frustration with this engine

Sincerely
Mike

 

[Tiberius]

I would guess that the problem is not in the phaser itself, but in one of the related components around it or the connections between them. In other words, I expect the root problem is with one of the following (or the wiring or connectors making contact to one of the following):

Crankshaft position sensor
Cam position sensor
Oil control valve
Oil temp sensor

My wild asss guess without being there is that you have an intermittent electrical connection issue to one of those items.

 

[mikebartusmc]

Ok I did splice the OCV connector to another one because it was dry rotted.... the one connecting now is not that snug Im going to relook at that connection again and or order another OEM OCV pigtail connector to ensure snug fit.

I think Ill be hysterical if thats all it is
Thank you again Tiberius

 

[Tiberius]

Well I'm not sure how much help I'm being, but here's to hoping it's something as simple as that! Certainly a failure of the OCV (or a failure to be able to send it control signals) would be a likely culprit for setting any sort of cam timing error code.

Do you have any real time data display or collection abilities? Can you see what the cam sensor output is doing?

 

[mikebartusmc]

Hi Tiberius,
I tested the Camshaft position sensor @ 800 rpms and had a steady input of about 4.9V which I believe is with in specs 0-5 volts? I'm waiting for the new OCV pigtail to arrive to connect that.
I was getting about 12-13 volts @ 800 rpms coming from the 2-wires to the oil control valve. I'm still wondering if I don't have something screwed up in the CVVT Phaser? I'm also waiting on a new one of them to arrive also.
I also rechecked the OCV screen/filter and no clogging there!

 

[Tiberius]

I tested the Camshaft position sensor @ 800 rpms and had a steady input of about 4.9V which I believe is with in specs 0-5 volts?

I'm operating only on what I can glean from the service manual, but I don't think it works that way... The sensor has three pins:

A) Power - This should be 12V when measured to engine block.
B) Ground - This should be 0V when measured to engine block and zero Ohms to the block when checked on the resistance scale
C) Sensor output - This should have a five volt tall square wave on it when the engine is running. The frequency of the square wave will vary with RPM.

You can't measure the output of the CMPS with a DVM unless it has a frequency input scale. If you've got a steady 4.9V out of the CMPS while the engine is running, then that's a problem.