I raised timing on powerlogger and blm is up to 170 at 1/8 mi run, inj max also

[stevek]

I went to test and tune , car ran pretty good i guess. my time was 7.34 @ 96 mph.I've been raising timing and my blm at wot is at 170,i had my blm set on pl at 150, inj were at 93%, i have 60 lb inj ,boost 30 lb,turbo t64e with meth, I did have kn when going into 3rd 4.3 then was gone. did i max out my combo and may have to go to 80 lb inj any feed backi would appriciate it , hope you can read pl, this is off my Macbook Air, I have half my computer split with windows, thanks

 

[Eric Stage I]

Since you're not making enough power to max out 60lb injectors, I would guess that either: fuel pressure not keeping up, alky not spraying enough, or bad wideband O2 sensor

Eric

 

[stevek]

My fp is set around 45 lb and at wot is around 75 lb i have guage on hood. my pl say 93 % on inj and i have an old smc single nozzle progressive kit with straight meth in it,I have AEM wide band guage and scanmaster both of which read 10.5 but pl reads 11.3 to 11.5 still off by 1 number, i thought if inj go to 95 % they are max

 

[Eric Stage I]

If the wideband reading is not right, that will cause problems. What version is your Powerlogger software (press the "about PLC" button on the help tab)? Need to get those a/f numbers matching.

 

[stevek]

sorry had to step out version 1.40 powerlogger baily 2006,2007,2010

 

[stevek]

If the wideband reading is not right, that will cause problems. What version is your Powerlogger software (press the "about PLC" button on the help tab)? Need to get those a/f numbers matching.

Hey Eric just took car back out this morning and watched fp better, I made 4 runs to 100 and it looks like my fuel pressure is only going to 65 lb now at wot and then it starts to drop down to 60, maybe time to change old kenne bell fp reg, but i still wonder why wide bands wont match up, let me know any help thanks

 

[Eric Stage I]

Ok, so you might have a couple issues.
Lets start with the wideband. Just to confirm, that's the AEM 30-4100 gauge?
Unplug the wideband sensor, then power up the gauge. It should stay on 14.7. Check the voltage where the white wire is connected to the Powerlogger input board, should be 2.35v or very close. (With voltmeter, red on wideband input, black on ground #4 term).
Powerlogger and scanmaster should also read 14.7.

 

[stevek]

Ok, so you might have a couple issues.
Lets start with the wideband. Just to confirm, that's the AEM 30-4100 gauge?
Unplug the wideband sensor, then power up the gauge. It should stay on 14.7. Check the voltage where the white wire is connected to the Powerlogger input board, should be 2.35v or very close. (With voltmeter, red on wideband input, black on ground #4 term).
Powerlogger and scanmaster should also read 14.7.

ok thanks will try and see what it is , i'll let you know thanks

 

[stevek]

Ok, so you might have a couple issues.
Lets start with the wideband. Just to confirm, that's the AEM 30-4100 gauge?
Unplug the wideband sensor, then power up the gauge. It should stay on 14.7. Check the voltage where the white wire is connected to the Powerlogger input board, should be 2.35v or very close. (With voltmeter, red on wideband input, black on ground #4 term).
Powerlogger and scanmaster should also read 14.7.

sorry and yes it is the AEM 30-4100 gauge

 

[Pronto]

How old is your fuel filter, any twists in the metal line at the filter from previous owner removals (ask me how I know)?

 

[stevek]

Ok, so you might have a couple issues.
Lets start with the wideband. Just to confirm, that's the AEM 30-4100 gauge?
Unplug the wideband sensor, then power up the gauge. It should stay on 14.7. Check the voltage where the white wire is connected to the Powerlogger input board, should be 2.35v or very close. (With voltmeter, red on wideband input, black on ground #4 term).
Powerlogger and scanmaster should also read 14.7.

AEM stays at 14.8, pl and scanmaster both 14.8 also, the pl input white wire reads 2.35,

 

[stevek]

How old is your fuel filter, any twists in the metal line at the filter from previous owner removals (ask me how I know)?

fuel filter maybe 6 months old, i'm the original owner and i already twisted line at filter at nut and replaced it with fuel line years ago thanks

 

[Eric Stage I]

AEM stays at 14.8, pl and scanmaster both 14.8 also, the pl input white wire reads 2.35,

Not sure what to tell you there, it's all matching up. You say it doesn't match at full throttle?

On the fuel pressure, make sure you have good voltage, but could be regulator, hose in tank leaking, or pump problem.

Also, I would double check alky output, especially since you saw knock.

 

[stevek]

Not sure what to tell you there, it's all matching up. You say it doesn't match at full throttle?

On the fuel pressure, make sure you have good voltage, but could be regulator, hose in tank leaking, or pump problem.

Also, I would double check alky output, especially since you saw knock.

yes it seems to be about 1 number higher on pl at wot, i would think i would be getting more knock with that boost with it set at 11.5 on pl compared to reading on AEM gauge reading 10.5

 

[Eric Stage I]

Somehow you'll have to check the wideband output when the a/f is in the 10.5-11.0 range.
The scanmaster a/f is copied directly from PL, so those should be identical.
You might be able to check things during a cold start when the a/f would be in that range.

 

[Eric Stage I]

Did your PL come with version 1.4.0, or did you upgrade it?

 

[stevek]

Did your PL come with version 1.4.0, or did you upgrade it?

came with 1.4

 

[stevek]

Did your PL come with version 1.4.0, or did you upgrade it?

i going to take car back out and see again and ck fuel pressure, i tightened screw down on fp reg ity held at 90 then put back at 45, now if im correct at wot and boost is at 30 my fuel pressure should be at 75, i had 12.7 volts at wiring to pump motor running, i will post in awhile thanks

 

[stevek]

Did your PL come with version 1.4.0, or did you upgrade it?

fuel pressure rose up to 70 lbut not 75 lb at wot, and you were rite the scan master and pl were same thru out run but AEM gauge was about 1 no. lower.

 

[Chuck Leeper]

Have you done the "rag test" on the sensor?
What FP gauge are you using?