|10-28-2006, 07:51 AM||#1|
Join Date: Dec 2005
Low RPM Low Load Issue
Guys I've got a strange problem that start a couple of days ago. So it could be mechanical.
Taken -12% from the MAF table due to running a Fuel Pressure Reg to get as close to the AFR Maps as possible. Also the car has run minus MAF setup for 2 months with no known issues.
The car has developed a stutter/surging condition at below 2000rpm and idle is rough. Looking at the logs the diagnoses looks as...
1. Idle is rough and evident from log 1 AF Correction adding fuel, then suddenly settles down to normal - see log 1.
2. Cruising below 2000rpm the car will stutter/surge sometimes violently. Again AF Correction is adding then substracting fuel frequently - see log 2
*** How do you post at NASIOC? Logs are too long to wrap around code! ***
What mechanical problems should I be looking at? Spark Plugs etc?
Now above 2000rpm the car hauls and runs normal with no CEL's etc.
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|11-01-2006, 12:52 PM||#2|
Join Date: Nov 2003
Location: Pittsburgh, PAVehicle:
. Always drive
the race line .
you're tuning in a weird way. Increase the injector scalar instead of removing 12% from the MAF table. The car thinks you're in a lower load zone then you really are causing you to run higher timing than you should. That's the first of your problems.
I know that wasn't much help to your current problem but check for intake leaks.
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