I have a situation where my BLM's are consistently low (~114-116). After searching and reading (and noticing there are a lot more issues & solutions regarding High BLM's), I learned that lowering fuel pressure is one of the first troubleshooting steps. I lowered FP from 42 line off to 40 and my BLM's did raise to 122 within a couple of minutes. I took the car for a 10 minute drive came back and lo and behold the ECU was still making corrections as my BLM's were back at 114.
I tried lowering the FP some more to see what would happen. As one would expect, the car started stumbling and the idle got rougher as I went deeper into the 30's (all line-off). At this point, I raised the FP back to 42 (line-off) as per Turbo Tweak Chip recommendations and went for a drive. Once I came back, I took a look at the Scanmaster and again at idle the BLM's were at 114 or so. I came back here and searched some more, but like I stated there aren't too many low BLM threads (not too mention searching for "BLM" releated threads is a pain in the ass using the search engine).
What should I look to next? Other than some richness smell (I am running without a CAT so some rich-like smell is to be expected) and "bad" gas mileage (about 15mph highway driving over the last three tankfuls) the car seems to be running relatively well- knock wood. But I'm ready to tackle this - if it is an actual problem. Is this a MAF prob? O2 sensor?
My Scanmaster readings at a warm idle (spending 10 seconds at each setting) were:
O2 780-824
AF 06
L8 40-46
Bat 14.4
Int 128
Blm 115
Ats 60
r 825-875
tps .42
Iac 23
cc 207
As my sig states I am running alky (@ 25lbs) and a corresponding Turbo Tweak Alky chip.
Thanks for reading!
I tried lowering the FP some more to see what would happen. As one would expect, the car started stumbling and the idle got rougher as I went deeper into the 30's (all line-off). At this point, I raised the FP back to 42 (line-off) as per Turbo Tweak Chip recommendations and went for a drive. Once I came back, I took a look at the Scanmaster and again at idle the BLM's were at 114 or so. I came back here and searched some more, but like I stated there aren't too many low BLM threads (not too mention searching for "BLM" releated threads is a pain in the ass using the search engine).
What should I look to next? Other than some richness smell (I am running without a CAT so some rich-like smell is to be expected) and "bad" gas mileage (about 15mph highway driving over the last three tankfuls) the car seems to be running relatively well- knock wood. But I'm ready to tackle this - if it is an actual problem. Is this a MAF prob? O2 sensor?
My Scanmaster readings at a warm idle (spending 10 seconds at each setting) were:
O2 780-824
AF 06
L8 40-46
Bat 14.4
Int 128
Blm 115
Ats 60
r 825-875
tps .42
Iac 23
cc 207
As my sig states I am running alky (@ 25lbs) and a corresponding Turbo Tweak Alky chip.
Thanks for reading!