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Reviving this old thread...I can't the Worksheet.xls to open correctly. Is there something special to consider?

Heaters have been tested, and are functional.

Could the cat's being further back possible be the problem? Maybe try moving the O2 switching points around in the open/closed loop tab.

What year is the engine? 2006 and beyond don't require a flex fuel sensor.

It's in closed loop the entire time. If you look at the table in the scanner (bottom right) you'll see that. The O2's swinging is when I forced -20 degrees timing. That's the only time I could get...

Thanks for the tips. So far I've taken care of the proportional and integral tables without messing with the stock tune (way rich). Doing that seems to have improved things a little. Tommorow I'll...

I've done this before, but I must obviously be missing something vital. I reloaded the stock tune, started and scanned idle. It didn't take long to start surging. I forced timing down with minimal...

Completly stock L59 flex setup

BTW
It's DBW. Does it use IAC number? They never move. IAC always 310, even though 0-10 desired.

Where to start... I have a New (400mile) 06 5.3 Truck with 4L60E in a restored 69 Firebird. I am to the point of hating the car...I've been dicking with this freaking tune for years...no I'm not an...

What ever happened with this. I have the VCM Scanner 2.24. It doesn't seem to have the RTT function available.

I know this is old...who makes this? My voltage never goes over 13.4...

Why is my desired airflow at idle only 2.3g/sec?

I upped the RAF and VE for the idle area. Here's how it looks now..

I've checked for air leaks and checked the TB...nothing found. Does 2.8g/sec at 600rpm sound normal for desired g/sec for a stock 5.3 silverado transplant? Seems real low to me.

Latest log...I set PE 400,800 to 0% throttle, then to 1.00 (14.68) in those PE EQ ranges. I thought that fixed it. It idle great the first two or three stops, then back to the crazy ekg.

TPS is new

...

Been VE tuning, the car runs good and trims are good when the EVAP purge connector is unplugged. I plugged the EVAP back in after getting most trims to +/-3...but now the trim are +6 to -6/???
I...

Can't you just unplug the EVAP purge plug??

Ok...I'm going nuts! I've been dorking with my tune for a while(beginner). I got the SD only portion of the tune fairly ok, but idle surged and idle timing was like an EKG. So I OL tuned the idle....

Brice,
It's a 69 Firebird with a L59(Flex 5.3) and 4L60E and 3.36 rear. I'm about 1hr 15min from Bitburg which would work....just not on the 10th of June. I can do the 9th or the prior/next...

Ed,
I'm located near Ramstein AB. About 1hr from Frankfurt, 2hrs from Stuttgart, 45min from Saarbruecken, or 15min from Kaiserslautern. A local Audi dealer hear has a dyno and charges 70 Euro an...

I'm looking for someone that can fine tune my tune on a dyno....in Germany...anyone here in Germany?

Pretty sure it's clean...only has 3,000 miles on it. It's a DBW TB