AutoVE tuning MS4 cam.....
AutoVE tuning MS4 cam..... OK, this past weekend I had the pleasure of performing some logs and tuning
First, I RAFIG map from a cold start and adjusted my Base Airflow Table with the results from the map.
Then I followed the AutoVE tutorial and started to do some logging in SD Open loop.
I did this three times. Most of my adjustments were below 3k rpm.
I re-checked the BEN's aferwards and seemed to be pretty close with BEN #'s in the 1.0 and 1.1 range.
One thing I noiced is I has some rather large peaks in my MAP.
While still SD Open Loop AUtoVE tune, I could see my idle AFR reading very close and steadily @ 14.7 as well as moderate throttle up to 3k rpms.
I was very pleased with the results.
Then I performed the idle tuning adjustments as posted by SSpdmon on another post. I guess because I have a '98 I cannot change the Delay timers to 5 seconds because I do not see those tables B4504 B4505.
I immediately noticed an improvement in the restarts and part throttle operation. I now have a idle hang up at times. I will come to a stop and it will be idling @ 1100 then drop to the desired speed of 950.
After the idle tuning, I decided to put the calibration back to SD Closed Loop.
This when everything started to wreak havoc in my eyes.
All of my AFR's when back to what it was before the AutoVE tune.
I see AFR @ idle in the 16.5 range and driving down the road I see between 15.5 and 16.5.
Just for $hits & giggles, I bumped the MainVE table 6 percent between 400-1200 rpm to see if my idle AFR would go down. No help. Still reads hi. Sometimes I see 17's at idle, starting to scare me.
Is all of this happening because it is in Closed Loop?
I tried making some changes to get it in Open Loop at idle but no success getting to go into open loop at idle.
I considered SSpdmon's suggestion about starting a custom OS but I do not see a useable calibration for my year application: 1998.
Am I going to have it just leave it in Open Loop? If so, How?
Look forward to any suggestions and many thanks in advance!
Gil
Just in case, here are the specifics on my car:
1998 Ws6 6 spd.
Patriot LS6 243 CNC heads stock valves
FAST 90 intake
Holley 90 TB
Stock 28lb injectors
FAST fuel rails
TSP MS4 cam
PAcesetter headers and ORY
SLP 85 MAF (disconnected)
LS7 lifters
7.4 TSP pushrods
3:73 10bolt
First, I RAFIG map from a cold start and adjusted my Base Airflow Table with the results from the map.
Then I followed the AutoVE tutorial and started to do some logging in SD Open loop.
I did this three times. Most of my adjustments were below 3k rpm.
I re-checked the BEN's aferwards and seemed to be pretty close with BEN #'s in the 1.0 and 1.1 range.
One thing I noiced is I has some rather large peaks in my MAP.
While still SD Open Loop AUtoVE tune, I could see my idle AFR reading very close and steadily @ 14.7 as well as moderate throttle up to 3k rpms.
I was very pleased with the results.
Then I performed the idle tuning adjustments as posted by SSpdmon on another post. I guess because I have a '98 I cannot change the Delay timers to 5 seconds because I do not see those tables B4504 B4505.
I immediately noticed an improvement in the restarts and part throttle operation. I now have a idle hang up at times. I will come to a stop and it will be idling @ 1100 then drop to the desired speed of 950.
After the idle tuning, I decided to put the calibration back to SD Closed Loop.
This when everything started to wreak havoc in my eyes.
All of my AFR's when back to what it was before the AutoVE tune.
I see AFR @ idle in the 16.5 range and driving down the road I see between 15.5 and 16.5.
Just for $hits & giggles, I bumped the MainVE table 6 percent between 400-1200 rpm to see if my idle AFR would go down. No help. Still reads hi. Sometimes I see 17's at idle, starting to scare me.
Is all of this happening because it is in Closed Loop?
I tried making some changes to get it in Open Loop at idle but no success getting to go into open loop at idle.
I considered SSpdmon's suggestion about starting a custom OS but I do not see a useable calibration for my year application: 1998.
Am I going to have it just leave it in Open Loop? If so, How?
Look forward to any suggestions and many thanks in advance!
Gil
Just in case, here are the specifics on my car:
1998 Ws6 6 spd.
Patriot LS6 243 CNC heads stock valves
FAST 90 intake
Holley 90 TB
Stock 28lb injectors
FAST fuel rails
TSP MS4 cam
PAcesetter headers and ORY
SLP 85 MAF (disconnected)
LS7 lifters
7.4 TSP pushrods
3:73 10bolt
In your other post, I mentioned the delay timers (that you couldn't find) were combined in your OS. Search for B4519...it's under Engine>Idle>Learning>Parameters. Factory setting is 1.8 seconds for your year IIRC.
I just thought of something....you say you went back to closed loop.
You didn't re-enable the MAF, did you? If so, the MAF needs to be tuned after the VE is completed.
How long were you at those AFR's? Was there enough time for fuel trims to start making corrections?
Where's your WBO2 in relation to your NBO2's? Is it possible there may be other factors affecting the reading (exhaust leak, cat. converters, etc.)??
I just thought of something....you say you went back to closed loop.
You didn't re-enable the MAF, did you? If so, the MAF needs to be tuned after the VE is completed.
How long were you at those AFR's? Was there enough time for fuel trims to start making corrections?
Where's your WBO2 in relation to your NBO2's? Is it possible there may be other factors affecting the reading (exhaust leak, cat. converters, etc.)??
