Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

Can someone please look at a datamaster file, PLEASE.

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Old Aug 3, 2005 | 02:39 AM
  #16  
madwolf's Avatar
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Re: Can someone please look at a datamaster file, PLEASE.

Volumetric Efficiency tables do not affect closed loop operation. The tear in the elbow will affect the way your car runs due to unmetered air going in. You did not mention this in any of your emails either.

You can use Vemaster to adjust your VE tables in open loop. That will help with your BLMs and gas mileage.
Old Aug 3, 2005 | 08:51 AM
  #17  
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Re: Can someone please look at a datamaster file, PLEASE.

Just curious.... my look at the first file showed you had possible problems with one O2 sensor, the MAP sensor and/or the TPS sensor. Did you check any of those items?

Seems like deciding to go "open loop" to solve the problems is just one way of covering them up, and hoping they go away. The O2 sensor obviously won't hurt you in open loop, but the others may, if they are really problems.
Old Aug 3, 2005 | 07:07 PM
  #18  
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Re: Can someone please look at a datamaster file, PLEASE.

The 02 sensors are both brand new, maybe 3 days on them. I fixed the tear in the elbow, so that is no longer an issue. I am not trying to downplay Ion's work. He has been great from the start, however I am trying to get a feel of what may be wrong with the car. Everything is new, besides sensors and wiring harness stuff. I am going to take off my elbow tonight and check the MAF and see if it may have been gutted before I purchased the car. I can replace the TPS sensor and the MAP sensor if you beleive those are bad. However, I am pretty sure the sensor's are working due to the fact that before the rebuild I didnt have any problems.

Though with a year of sitting, I guess they could have just gone bad?

I also noticed the weird problem with the 02 sensor on the left side as far as the values go... It looks really off compared to my right 02 sensor. Could some where down the line the 02 sensor wire gotten cut or something and is causing it to read funny? Or is it more than likely an injector or multiple on the left side are not firing? Any info on how to check and see if the injectors on the left side are firing would be greatly appreciated.

Thanks for all the help.

Last edited by Silvershark; Aug 3, 2005 at 07:15 PM.
Old Aug 3, 2005 | 08:02 PM
  #19  
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Re: Can someone please look at a datamaster file, PLEASE.

Ok, pulled the MAF, its not descreened, and all the resistor looking things are in place and connected.
Old Aug 4, 2005 | 08:55 AM
  #20  
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Re: Can someone please look at a datamaster file, PLEASE.

Since you have a scanner you can look at the TPS all through its range and determine if it is good or not. Just turn the key on have the scanner hooker up where you can look at it and turn the throttle open , it should read about .45 to 5 vdc closed and move linear as you open it up to around 5 vdc @ WOT. About a half a volt either way at the top or bottom is acceptable.
Old Aug 4, 2005 | 07:01 PM
  #21  
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Re: Can someone please look at a datamaster file, PLEASE.

looking at the scan file that I took in open loop mode I the voltages look like they are not around the .45 to 5vdc as I open the car up like you are saying.

However the TPS voltage looks like it goes from .09 to 2.9vdc.

I just went ahead and purchased a new 1LE elbow and a new TPS sensor from Jason Cromer. Should be here monday.
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