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Cam position deviation via Durametric

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Old Sep 27, 2020 | 10:32 PM
  #16  
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Originally Posted by Porschetech3
What's the chances of both of y'all having the exact same Cam Deviations to the tenth of a degree (even if they are on opposite banks)? .
Zero.

It makes me wonder if the issue is a bug or limitation in the Bosch firmware. I guess tuners are merely modifying a\f ratio tables vs load\revs and nobody has actually debugged the microprocessor code and reverse engineered why the DME is getting these values.

Socal, I tried my Autotel but didn't notice any camshaft position field, but I will try tomorrow with the engine running. I have a side question about my Throttle Position readings. Is it supposed to go from 0-100%? Mine only goes 0-80%, should I get excited and find I can replace TP sensor and get 20% more throttle? (Picture taken with accelerator to the floor) I will check this on the Durametric tomorrow also.



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Old Sep 28, 2020 | 10:16 PM
  #17  
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Originally Posted by TRLBRAKER
I have a side question about my Throttle Position readings. Is it supposed to go from 0-100%? Mine only goes 0-80%, should I get excited and find I can replace TP sensor and get 20% more throttle? (Picture taken with accelerator to the floor) I will check this on the Durametric tomorrow also.
With the engine off and ignition on, the Foxwell read 'throttle plate angle' at 71% with the pedal to the floor. I'll check it again with the engine running.






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Old Sep 29, 2020 | 01:03 AM
  #18  
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It sounds like TP reading of 70-80% at full throttle (engine off) is correct.

I thought about seeing the TP% while the engine on, but then I thought against that.

(1) You don't want to trigger a stage 1 over rev event.
(2) You don't want to be driving and looking at the code reader.

So I did the following to verify.
  • I checked with engine off.
  • I plugged my Durametric in.
  • I used a prybar to jam the accelerator pedal to the floor.
  • I placed my laptop on the car roof so I could see the screen while standing at the engine bay. The graph was plotting 81% constantly.
  • I used my finger at the throttle body to try and open it more but it would not open any further. The graph plot continued at 81%.

Last edited by TRLBRAKER; Sep 29, 2020 at 01:04 AM.
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Old Mar 21, 2022 | 05:45 PM
  #19  
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I have a weird problem. My Durametric appears not to be able to read camshaft deviation on bank 1. On Bank 2 the deviation is ~0.5 degrees on startup and then when the engine warms up it get to ~1.2 degree. The reading is steady irrespective of RPM, so I am guessing the reason it increases with temperature is because chain length may change a bit as the chain warms up. Either way, no issues on bank 2. However, bank 1 remaining at 0.00 suggests to me not a perfect timing, but that the software simply can't read bank 1 deviation. I have no camshaft position sensor issues and I can monitor Actual angle for inlet camshaft on bank 1 and 2. Anyone know why I can't read bank 1 camshaft deviation?

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Old Mar 21, 2022 | 07:20 PM
  #20  
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What year's your car? Some early 99's have only 1 CPS.
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Old Mar 21, 2022 | 09:00 PM
  #21  
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I can only get a bank 1 reading on my ‘99 but it’s because I have a RoW flash on the DME.
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Old Mar 21, 2022 | 11:52 PM
  #22  
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I should have specified that mine is a 2002, so I have the 3.6 engine. From what I found online the RoW tune on early cars only have bank 1, while all other should have bank 1 and 2 camshaft position deviation. Even if my car were to somehow have RoW tune, bank 1 should always be there and it is the bank 2 that may be zeroed out in that case. How do I confirm the software on my car. I purchased it 4 years ago. I always assumed that it was factory tune, but I don't know how to confirm that. Can any other issue lead to bank 1 not showing a reading for bank 1 camshaft deviation?
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Old Mar 22, 2022 | 11:14 AM
  #23  
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FYI I found, using the Durametric logging, that the ratio of pedal position to actual throttle position is variable based on a variety of factors. I think they include engine temp, clutch position, among other things. This obviously only applies to egas models, but worth noting before you go too far down a rabbit hole chasing things.
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Old May 17, 2022 | 09:16 AM
  #24  
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'99 ROW car, so single cam deviation sensor, DME 5.2.2, also pegged at 3.0 degrees (makes me wonder ...)




Last edited by BogdanT; May 17, 2022 at 09:17 AM.
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