High BLMs

[Steve Wood]

What were your O2s when the car was warmed up and idling in gear?

If I did not know better, I would think the injectors were smaller than what the chip was burned for...

How did the car drive with the fp turned up?

[Steve Wood]

17% more fuel should have had it billowing black smoke

What maf are you using and what is the maf reading at idle?

I would suspect the voltage drops to be due to the ground side if you were talking about voltage at the pump.  Not sure why voltages would be dropping like that, tho.

 Voltage supply to the ecm goes:  Alternator-battery-starter-fusible link-bulkhead connector-ignition switch-fuse block-ecm    as I recall without looking at the diagram.  Common problems are bulk head connector, fuse block terminals, and ignition switch connector

I have also seen problems with loose connection at the starter

I asked elsewhere, but, is this a Regal, or a transplant into the super coupe?

[Dont Panic]

I will check the O2s in gear.  In park they are now at around 700.

The engine and transmission are in a turbocoupe.

MAF readings at idle are 4-6.

The car seemed to be a bit less responsive while driving but pretty smooth.  I think I am suffering some major turbo lag, but I haven`t put my foot right to the floor.  This was also an issue I used to have.  Is there generally a lot of turbo lag at 3/4 throttle and 5 lbs of boost?

I can not notice any black smoke.  I will need to get someone to watch me drive down the road.

As for the injectors being smaller than what is burned on the chip, I had that same thought, however I never owned any chips for 60lbs injectors.  Is the chip ID shown anywhere in direct scan?

[Steve Wood]

no, it should be written on the chip on a paper tag.

700 is very lean.  It should be 780-800

that tells you that your blms are not lying to you.

Depends on what turbo and converter you have, but, normally, the answer is no--if the combination is matched between between the turbo and converter...if you are rolling, the boost should be virtually instantaneous

[Dont Panic]

I tried out Dave`s fuel pressure gauge and it is reading within a couple of psi of my gauges.  I found an old R93 chip that I got with my turbo and I gave that a try.  With the fuel pressure back to 42 lbs, I was getting blms lower than 128.  So..... I might have swapped chips with someone a few years back and I just can not remember.  I sent Eric an email with the chip ID as shown on direct scan.  I have a feeling I may have tried out a known good chip the before parking the car a few years back.  I`ll see if Eric can make sense of the ID.

With the mystery TT chip with the fuel pressure turned up to 60 lbs, and the R93 chip at 42 lbs, the car is pulling hard.  The car runs rough with the R93 chip during normal driving though.  So maybe I had the wrong chip all along and I have been chasing a problem that did not exist.

[Dont Panic]

I found a folder on my computer with all my bin files.  I saved all my chip files onto my computer in case a chip broke so I could just re-burn it.  The chip that I have to crank up to 58 lbs is a turbo tweak chip.  I opened the bin files with a hex editor and found where the prom ID is located and it matched the ID on direct scan.  The nightmares of this car are slowly coming back to me.  Life was easier when it was in storage.  I will see what Eric says.

[Dont Panic]

I am going to have to drive my car up North in a couple of days to store for a bit.  It is about a 2 hour drive.  What chip should I be using?

Option 1: Turbotweak chip and fuel pressure cranked up to 58 lbs (line off).  The car runs smooth with no hesitations.  BLMs are down to around 125 - 134.

Option 2: Red Armstrong chip and fuel pressure set to 40-42 lbs (line off).  Minor hesitation.  Feels like it is going to stall when shifting from park to drive.  BLMs around 118-128.

Both chips were only used for about 10-15 minutes at a time as I tested the car around the block, so the BLMs might still be rising or lowering.  The car feels better with the turbotweak chip, but is there risk of damaging anything with the fuel pressure cranked up so high?  I was thinking I would just use the turbotweak chip and keep an eye on the blms as I cruise on the highway, and pull over and adjust the FP regulator if required.

[Steve Wood]

I would have no problem with the TT chip.  I would not try my luck with boost, tho....

[Steve Wood]

sounds like 42.5# injectors and a 50# chip

[phil_long]

so the blms would be higher do to smaller injectors and the chip being burned for bigger ones?  So the ECM sees it as being lean JUST because the chip isn't burned for the injectors??  I know I sound dumb but i enjoy learning!

[Steve Wood]

the bigger the injector, the shorter is the pulse required to idle or cruise.  Therefore, if you have a chip made for 50# injectors but have 30# injectors instead, it will not give enuf fuel to the car to idle or cruise.  Then, the ecm sees the car is lean so it tries to add fuel.

For example, a small injector might require a pulse length of 2.8ms at idle whereas a larger 75 Lb injector might require a pulsewidth of only  1.7 ms to idle.

It never hurts to check the numbers on the injectors to see what size they are against the label the chip guy puts on the chip saying what it was burned for.

[motorhead]

Matching the injectors to the chip is the only way to go here. However, higher fuel pressure with the better chip (and disconnecting the wastegate!) is probably the way to go if you HAVE to drive it.

ID your injectors and order a new chip.

[Just a Six?]

If all this turns out to be is just a mismatched chip injector combo I'll bet you actually see the Grey Hair shoot out of your head after all this troubleshootin g over the past years!   
Hopefully that's all the issues you have & the car runs normal again! 

[Dont Panic]

I checked the id's on the injectors and they are 42 lbs which is correct. The chip was supposed to be burned for the 42s and likely were, but if Eric happened to have made a mistake I think I would be relieved as at least everything would make sense. Otherwise it is back to troubleshootin g and scratching my head.

[Just a Six?]

I bet that Eric would send you a new chip just to be sure once you explain whats going on & if not you can mail it back to him.
He is a good guy that is usually willing to help out from my experience.