WTF- Short Fuel Trim "Blip"?
06-10-2005, 02:59 PM
#21
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Originally Posted by Another_User
The issue in those logs is definitely dropped packets. Anyone else?
06-10-2005, 05:47 PM
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Originally Posted by dewmanshu
email of log sent. Frame 1068 and **** I forgot..uhhhmmmmlike 1190 or something like that.
06-10-2005, 07:16 PM
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Originally Posted by Another_User
That one was dropped packets too. I think you guys just need to adjust your serial port settings myself. If you are using a USB-serial converter that could be the culprit too.
06-10-2005, 07:17 PM
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Originally Posted by Another_User
If you are using a USB-serial converter that could be the culprit too.
06-10-2005, 07:45 PM
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yeah the moer i look at it, it isnt a dropped packet. usually you lose everthing for a second. If you feel it obviously it isnt the scanner. dunno what it is though
dave
dave
06-11-2005, 08:38 PM
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Originally Posted by WS6FirebirdTA00
i have some drop but not them all, i even have computer settings drop to nothing as well as the actuals, i dont know whats going on, maybe the hp tuner guys can help? maybe?
06-11-2005, 09:44 PM
#30
this is what ken said in my other post
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Quote:
Originally Posted by WS6FirebirdTA00
mine has met all the specs so i think mine is just a cable issue
one more question though, i notice some blips in mine when logging, some of the time all the numbers go to 0 or far negarive (assuming if its all of them its the connection issue) but sometimes the fuel trims will just drop to 0 mostly short term, and the others will stay the same, what would cause the stft's to go to -100?
im gonna see if i can try another serial cable if i have one sitting around
It's not uncommon for the VCM to drop packets while scanning. Scan data is the last priority on the list of things to do. You are also scanning at the highest rate the VCM can handle. If it has to talk to other modules on the car, that data comes first.
Super Sport X2
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Quote:
Originally Posted by WS6FirebirdTA00
mine has met all the specs so i think mine is just a cable issue
one more question though, i notice some blips in mine when logging, some of the time all the numbers go to 0 or far negarive (assuming if its all of them its the connection issue) but sometimes the fuel trims will just drop to 0 mostly short term, and the others will stay the same, what would cause the stft's to go to -100?
im gonna see if i can try another serial cable if i have one sitting around
It's not uncommon for the VCM to drop packets while scanning. Scan data is the last priority on the list of things to do. You are also scanning at the highest rate the VCM can handle. If it has to talk to other modules on the car, that data comes first.
06-12-2005, 08:58 AM
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Originally Posted by WS6FirebirdTA00
this is what ken said in my other post
Super Sport X2
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Quote:
Originally Posted by WS6FirebirdTA00
mine has met all the specs so i think mine is just a cable issue
one more question though, i notice some blips in mine when logging, some of the time all the numbers go to 0 or far negarive (assuming if its all of them its the connection issue) but sometimes the fuel trims will just drop to 0 mostly short term, and the others will stay the same, what would cause the stft's to go to -100?
im gonna see if i can try another serial cable if i have one sitting around
It's not uncommon for the VCM to drop packets while scanning. Scan data is the last priority on the list of things to do. You are also scanning at the highest rate the VCM can handle. If it has to talk to other modules on the car, that data comes first.
Super Sport X2
LS1TECH Sponsor Join Date: May 2004
Posts: 49
Quote:
Originally Posted by WS6FirebirdTA00
mine has met all the specs so i think mine is just a cable issue
one more question though, i notice some blips in mine when logging, some of the time all the numbers go to 0 or far negarive (assuming if its all of them its the connection issue) but sometimes the fuel trims will just drop to 0 mostly short term, and the others will stay the same, what would cause the stft's to go to -100?
im gonna see if i can try another serial cable if i have one sitting around
It's not uncommon for the VCM to drop packets while scanning. Scan data is the last priority on the list of things to do. You are also scanning at the highest rate the VCM can handle. If it has to talk to other modules on the car, that data comes first.
06-13-2005, 05:12 AM
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Originally Posted by WS6FirebirdTA00
do you feel it when you are logging AND not logging? i forgot that you felt it, that is strange.
06-13-2005, 08:33 AM
#34
logging could cause missing spots in the log when the pcm cant put out that data, but maybe it works the other way too, giving out too much data and not changing things it needs to? losing control of the frame on the log AND certain response to certain conditions. try and go out and log only one parameter next time and see if it happens. maybe this will show something
06-13-2005, 11:56 AM
#35
Originally Posted by Another_User
That's an interesting idea. Could logging slow down the PCM's reaction time and cause the issue?
06-14-2005, 08:57 AM
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Originally Posted by 02sierraz71_5.3
might just be a problem with processor speed and amount of available memory, delphi isnt going to over engineer something it would cost more money.
