Well thanks to PCMforless my BLMs are no longer split, pretty well synched now. However, my BLMs stay at a constant 108 except during quick TPS changes (high-low or low-high) when they spike at 123 and drop right back to 108. The graph looks like the EKG of a dying man This is with Injector Flow Rate set to 25.38lbs/hr on my stock injectors.

How can I settle my BLMs around 128?

 

Just because your BLM's are @ 108, doesn't mean they are not split...

108 is the lowest that the computer will display (unless the default has been changed) So honsetly, your BLM's could be 100/50, and it will only show 108/108

I had the same issues, with extremely low BLM's... I increased my injector constant to read 26 (I think, or maybe 28) lb'ers...

This is of course a bandaid, as there is a reason for it to be running so rich, but its a bandaid that works for now!

I'll get around to finding the source of my running rich, but again, for now I'll just leave the inj. constants set higher, so it doesn't spray as much fuel, which brings my BLM's within much more acceptable ranges.

Jeff

 

did you tell bryan you have ported maf ends?there are 3 ways to fix this.first you can alter the maf tables or you can change the injector size ,and last you can scan for 30 min. and then run vemaster.i would look towards there being a problem with the maf tables.e-mail me your file and i will look at it.

 

Start by putting your injector table back to stock, 24.91 I think is what Tunercat displays for 94-95, you could even try less in effort to try to richen it up. Start with that though.

After that, play with the MAF tables based on your BLMs, I ended up using 110% (10% increase) on all MAF tables, although of course some of the upper range stuff maxes out at 8% increase but you will never, ever see that much air flow unless you have a blower/turbo anyway.

 

if his blm's are locked at 108 wouldnt that mean the car is rich and the computer is removing as much fuel as it can?lowering the injector size whould make this worse.he would need to raise the injector size making the computer think it dont need to be open as long.dr.mudge i usally agree 100% with everything you say but i think you read this thread wrong

 

You could just call Bryan tell and tell him the situation.

He will fix it.

 

Ok i may have found part of the problem. After wiring up the final stage of the new Mallory ignition, I fired it up to test things out, and this horrible squeaking noise was coming from the driver side bank so I inspected closer...the #5 wire had come off the plug No wonder the car stalled 5 times on the way to work. I guess when the power was applied, the spark was strong enough to arc to the plug, thus netting me BLMs ~123, and when at idle it was too faint and ran on 7 cyls with fuel for 8. Now, why this would affect both banks...

So after that find, plus the new ignition, I'm going to give the PCM time to re-learn all the cells (had to disconnect the batt) and scan again. Really anxious to get the rest of the NX kit installed this weekend, and it's not going to happen until the car is running well on motor.

Thanks for the tips guys, I'm going to keep the info handy.

 

Oh brother, I dont know what was going on there, either I lost some brain cells or I had a missfire.

If your already fibbing about your injector size and its still that bad, I suppose you could go ahead and fib some more and try 28# and see how that goes. Some people still use this method, but I'd prefer to have the tables work with correct numbers, so I'd go with the VE tables and work on them, but I suppose there is nothing really wrong with using the MAF as a tuning method.

If you change the injectors in the future then you need to figure out again how much to lie to the computer, sounds like a pain. At least the MAF though wont "ever" be changed, unless your planning on a MAF Translator.

 

Okay well today I did some more testing with a friend. The BLMs are of course at 128 until the car goes into closed loop, then they drop to 108 within seconds. While its idling at 108, I disconnected the MAF and the BLMs go back up to ~124-126. I thought OK its probably the MAF calibration tables in my PCMforless tune...so I flashed it with a stock '95 M6 BIN file....same result!

What the heck is going on here??

 

check your fuel pressure regulator.if it is stuck it will have too much pressure at low loads causing it to have low blm's

 

You can compare the files to see if he played with the MAF fields at all, sort of interesting that in SD mode it runs ok? hmm Maybe your MAF is dirty or on its way out?

 

Yeah he changed the MAF calibration in all four tables, but I still have a stock MAF and MAF ends (only polished the outside and smoothed the inside). With it disconnected the BLMs stay a little on the rich side (~124) at idle - better safe than sorry I guess. I've got a full Freescan log file of startup then idle, where it goes into closed loop, BLMs drop to 108, then I disconnect the MAF and they go back up, then reconnect and they drop to 108 again.

 

change the mass air tables back to stock.if you need stock files let me know and i will send them to you.

 

try a friends MAF and see if that makes a difference. you could just have a failing MAF sensor. when mine busted, probably after porting it, all my BLMs dropped to 108. after my newer MAF, just and unmolested one i got off the board, they all jumped to 115 range and i corrected the rest thru MAF table manipulation. this is a lot better than changing the injector rates. really all you do by changing the MAF tables is make the MAF more accurate.

 

yeah we thought that too, check up a couple posts i already re-flashed it with a stock BIN and the BLMs are still crapping out at 108...i'm going to swap MAFs with a friend like turbo_Z and others have suggested. man my eyes sting every time i drive now.