LX9 3.5l in MGB with 7730ecu and $A1 bin changing for larger displacement/injectors

[MG-Maxx]

Have engine running on S_AUJP and have tried Dave's Mod 8 tune.

Haven't been able to find out what the stock injectors flow information is. Have it set for 20lbs @55psi, if they are same as the 3400 injectors they are rated 18lbs @43.5psi. If anyone knows what the true info is for 12568155/12586557 let me know. I have found them listed on a couple sites but without any data. Without knowing this is set properly, I can't trust anything else. Played around with settings trying to get NBo2 to switch in closed loop. Had to go way big to get this to happen. Should I be looking for this or??? For the first time doing this, this just adds to the unknown variables so uncertain what to trust or do next.

Originally had issues with NBo2 and WBo2 reading opposite from each other. Fixed a couple leaks and wiring issue causing #6 cylinder injector not firing. Now they both read the same.

Trying to get idle set. o2 readings high, WBo2 11-12 NBo2 high 8-900. Have it set to stay open loop with DFCO,hiway PE and EGR off. Adjusting idle VE I seem to be able to get it from extreme rich to extreme lean.

I have also ran Dave's Mod 8 tune. Runs great but a lot of popping and banging off throttle. I went through and compared it to base S_AUJP bin. Besides the VE and base spark tables being changed. There is a change in the DIS set up.

BIN Location XDF Scalar Distributor(E) DIS(A)(F)

0x025 SETUP SPARK ADV Base Dist./Reference Angle (Deg) 60
0x026 SPARK ADV, Maximum Allowed for SA-REF (Deg) -10
0x028 SPARK RETARD, Maximum Allowed for SA-REF (Deg) -70

Mod 8 has the these settings:


0x025 SETUP SPARK ADV Base Dist./Reference Angle (Deg) 70
0X026 SPARK ADV, Maximum Allowed for SA-REF (Deg)(D) 0.0
0x028 SPARK RETARD, Maximum Allowed for SA-REF (Deg)(B)(D) -60.12 (entered as Positive)

The Spark Adv Max.... says to use -10 but doesn't say entered as positive as Spark Retard does. Seems Dave's tune has them reversed. Just the way he has it set or tuned or should be copied.

Just to eliminate one unknown, I have a 3 bar on order and looking at 60lb injectors so I can use code59 and have injector data.

Can I go ahead and tune VE and it will bring it within range or if injector info is wrong, its just gonna be garbage info.

Also had issues on top of this with the Ostrich. Seems having laptop plugged in caused it to blow. Waiting on new unit. Dave at Moates has been great working it out with me.

[dave w]

Maybe gearhead-efi member 84Elky will add to this post? http://www.gearhead-efi.com/Fuel-Inj...ghlight=S_AUJP

dave w

[MG-Maxx]

I have had to change a few things, learning curve so started fresh.

Had wiring issues which caused issues with Moates Ostrich, which they stood behind their product even with the issues being mine. Great company! Thanks to Six Shooter also, followed his direction to resolve wiring.

I have included my files, including a open loop idle. The spark is jumpy between ~29 to 35 degrees. I know it will move but seems excessive. Since I have found so many other things wrong just want to see if this is correct or an issue before I spend time trying to getting idle set. I thought ignition at idle should be about 16-20 degrees.

This is a GM DIS system from a 3100V6. Issue with Ign Mod or adjustment with pickup.

[MG-Maxx]

Needing some help. Car ran good before I lost my tune. It runs on A1 just needs adjusting. Been trying to get PE DFCO and Highway turned off. Still saw DFCO come on a couple times. I am including my bin and logs to see if anyone could help.

Went on run to day. Pub 67 log. On return Pub return log, it started running lean according to WB and was spuddering at constant TP. Noticed in log the BPW would go almost to 0.2 lower. Now car doesnt run well at all closed loop. Car stopped seeing Ostrich (computer still does- Ribbon cable?) so back to burning chips.

Will post second item with my SAUJP info. Haven't been running that due to knock, don't believe the DIS is set up correctly. Followed writeup that came with. Timing jumps around alot more then when running A1 tune.

About to give up and cut hole in the UIM and weld a carb on....

[MG-Maxx]

Here is the S-AUJP tune info. Even ran Dave W Mod 8 with about the same results in the begining but seemed to have more popping and banging from timing so haven't gone back but did try setting and some of the timing in the S_AUJP. Not sure where I am now.

The WB AEM 30-0300 doesn't agree with adx. Used the conversion settings in the write up to get working but.... The WB Gauge shows a couple points richer then the WB1 in log. It also is showing Sensor 2 readings which don't agree with sensor 1????"?

[MG-Maxx]

Found issue with running lean was low fuel and dirty filter sock. Cleaned and filled. Will have to get gauge working. Only have oil and water temp atm.

Did a couple WOT runs with the A1 bin. Didn't go open loop. Loading up a stock tune and transferring over my Injector base pulse and VE tables.

Trying to figure this out before going code 59 and adding turbos.

[MG-Maxx]

Update:

Found out that after warmed up, engine was idling to low and causing Alternator not to charge, underdrive pulley set up didn't help situation. This was causing issues at idle since ECU was seeing low voltage changing pulse width. Increased idle and now always have good voltage.

Will start new thread about DIS set up. Have added settings per instructions included with V6. Copied Dave W.'s settings due to Max Advance will not take a neg number (suppose to be -10). Added to Base Dist settings (changed from 60 to 70). Car runs fine but timing is jumpy. It does the normal few degrees but at times will jump to about 35 degrees and then go back down to mid-high 20's. Other thing that bothers me is max timing is showing mid 40's. All this in the datalog, is the high reading due to the settings for DIS, the extra 10 degrees in Base Dist settings:

I load up the A1 Bin and the idle timing doesn't have that jump in it. As part of troubleshooting I ran the crank trigger away from injectors to make sure issue wasn't picking up a injector pulses.