Thread: Question about LTFTs

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  1. #1 Question about LTFTs 
    GrandPrix Junkie machinegunsquid's Avatar
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    Just got done installing my WBS intercooler on the car. I ended up deleting the EGR and I am currently still running a stock PCM. (I've got an Intense tuned PCM ready to go in once I get my injectors)

    At idle with the engine cold, LTFTs are around -15 to -16.4 bouncing around between those two values

    At idle with the engine at operating temp, LTFTs stay around -10 to -12.

    Normal driving they bounce between -5 to -11

    Cruising at 60mph it will stay around -10.5 to -11.1

    WOT stays at 0


    No vacuum leaks, no exhaust leaks.

    STFTs stay between -2 to +3 at all times, and stays at 0 during WOT.


    My question is; Are my LTFTs wacky due to the EGR delete, or is there possibly something else going on?

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  2. #2 Re: Question about LTFTs 
     

  3. #3 Re: Question about LTFTs 
    The Blue One blueguy's Avatar
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    It might not be a huge vac leak, but it's possible with the IC.

    Those are some pretty beefy trims, lol.

    Are the MAF tables correct (i.e. matching year MAF/TB)?
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  4. #4 Re: Question about LTFTs 
    GrandPrix Junkie machinegunsquid's Avatar
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    I know I'm running rich.

    Vacuum is between -22 in/hg to -19in/hg fluctuating with the rpms.

    PCM is stock. Not been messed with at all. Running a stock L67 MAF and TB.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  5. #5 Re: Question about LTFTs 
    DUI BABY Bio248's Avatar
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    the intercooler is giving you a lot more headroom with the fueling and the stock tables are way off now. you're running rich.
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  6. #6 Re: Question about LTFTs 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    He is cammed, I blame that for the fuel trim problem.

    SMGPFC Member #1
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  7. #7 Re: Question about LTFTs 
    GrandPrix Junkie machinegunsquid's Avatar
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    Makes sense.

    Time to run around with the slowest cammed/intercooler setup ever, yay.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  8. #8 Re: Question about LTFTs 
    GrandPrix Junkie machinegunsquid's Avatar
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    Quote Originally Posted by Fivefingerdeathpunch View Post
    He is cammed, I blame that for the fuel trim problem.
    LTFTs were no where near that far off with only the cam. Cruising they would stay between -1 and +2.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  9. #9 Re: Question about LTFTs 
    The Blue One blueguy's Avatar
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    My XP car idled between -15-17 in/hg~.

    That's not too far off, but yes...stock car idles around -20~ give or take one or so. Cam doesn't make THAT much of an impact.

    It needs tuned too. Get wideband

    Until then, throw on a 2.8" and let me race you in a really slow car.

    Also, what about an exhaust leak? How'd you seal the IC? Is the PCV working?
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  10. #10 Re: Question about LTFTs 
    GrandPrix Junkie machinegunsquid's Avatar
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    Wideband is currently at AEM getting repaired under warranty. Should be back next week.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  11. #11 Re: Question about LTFTs 
    The Blue One blueguy's Avatar
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    Squidy McSquiderson.

    Answer my questions, I edited my post.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  12. #12 Re: Question about LTFTs 
    GrandPrix Junkie machinegunsquid's Avatar
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    But I like my 3.8 pulley. We've been together for so long.

    Car had an exhaust leak at the crossover. Got it welded and no more leaks.

    IC is sealed with RTV, top and bottom.

    Breather on the front, PCV is working fine for the rear.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  13. #13 Re: Question about LTFTs 
    The Blue One blueguy's Avatar
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    I thought breather was there for non-working PCV?
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  14. #14 Re: Question about LTFTs 
    The Blue One blueguy's Avatar
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    Put the oil cap back on for S&G's.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  15. #15 Re: Question about LTFTs 
    GrandPrix Junkie machinegunsquid's Avatar
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    Have pictures




    Though I had a good pic of the PCV setup. Drilled and tapped the brass plug in the TB, got that running to the Gen V PCV port.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  16. #16 Re: Question about LTFTs 
    GrandPrix Junkie machinegunsquid's Avatar
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    Operation ****s and giggles is on. Be back in a min.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  17. #17 Re: Question about LTFTs 
    The Blue One blueguy's Avatar
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    God ****ing damnit.

    **** YOU SQUID.

    Go take the JB weld out of that case you nub.

    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  18. #18 Re: Question about LTFTs 
    I live here. DirtDog's Avatar
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    Let's play guess what's wrong with the GM!!
    http://www.grandprixforums.net/my-06-gp-gxp-72403.html
    OBX headers, TEP tranny cooler, ls1 IM fuel rails and injectors, ls2 TB, ls7 MAF, full custom exhaust, Quad retro headlights, full out front and rear suspension work, tuned by HPT by me 8====>

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  19. #19 Re: Question about LTFTs 
    The Blue One blueguy's Avatar
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    IT'S THE BEST GAME.

    eva.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  20. #20 Re: Question about LTFTs 
    I live here. DirtDog's Avatar
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    I'm terrible at it
    http://www.grandprixforums.net/my-06-gp-gxp-72403.html
    OBX headers, TEP tranny cooler, ls1 IM fuel rails and injectors, ls2 TB, ls7 MAF, full custom exhaust, Quad retro headlights, full out front and rear suspension work, tuned by HPT by me 8====>

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