LTFT problems
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TECH Apprentice
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From: milton florida
LTFT problems Hey guys
Iv been doing a few logruns and for some reason at idle my LTFT B1 is +25% and the STFT seems to stay up there pretty high to. I have a small exhaust leak at the collector. could this be my root problem?
Iv been doing a few logruns and for some reason at idle my LTFT B1 is +25% and the STFT seems to stay up there pretty high to. I have a small exhaust leak at the collector. could this be my root problem?
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From: CT
yeah, I would definitely get that leak fixed... it's not helping matters...
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06MonteSS / DiabLew Tune
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
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From: milton florida
I had a stock bottom end H/C/I combo that was street tuned. and then i swopped to a 402ci with a 242 252 dur@50 and 610lift on a 113+3..11.5.1 compression-4400stall-ford 9in with 4.11 gears. after the install i had a tuner from the this forum start to tune it and the deal went south and he never finished it, so i bought HP Tuner and have been trying to sort it out. All He tuned after the swop was sitting in the driveway for about and hour..I have went in and played with the idle to get it to idle at about 900..still hunts a little, but it was at 1100 and surged bad. i also went in and changed the gears and tire size as it was wrong aswell and turned the fans to come on at 185ish..i dont even know were to start with the fuel and timing table's
I had a stock bottom end H/C/I combo that was street tuned. and then i swopped to a 402ci with a 242 252 dur@50 and 610lift on a 113+3..11.5.1 compression-4400stall-ford 9in with 4.11 gears. after the install i had a tuner from the this forum start to tune it and the deal went south and he never finished it, so i bought HP Tuner and have been trying to sort it out. All He tuned after the swop was sitting in the driveway for about and hour..I have went in and played with the idle to get it to idle at about 900..still hunts a little, but it was at 1100 and surged bad. i also went in and changed the gears and tire size as it was wrong aswell and turned the fans to come on at 185ish..i dont even know were to start with the fuel and timing table's
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Verdad Gallardo With the combo you are running there really is no basics. A bolt on car is what you should practice on. I just don't want to see you hurt anything. DO NOT go WOT. Greg's DVD is ok but a wideband should have come first.
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From: milton florida
Hey will this Wideband be ok to use with HP tuner?
http://cgi.ebay.com/ebaymotors/PLX-D...item483a047db3
http://cgi.ebay.com/ebaymotors/PLX-D...item483a047db3
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Joined: Aug 2004
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From: Portland Oregon
Absolutely get a wideband. If you get the Pro data logger with HPtuners, it will accept the analog input from the wideband, and you can log it all into a HPT scan. That's the best thing for tuning. For your B1 B2 sensors, when I see that one is reading different from the other, I replace both of them, or do a leakdown test to see if you have a bad cylinder. They always vary a little bit, but if you are seeing +20 LTFT on one, and 0 on the other, there is no way to tune out of that, something is wrong with a sensor or a cyl..
Absolutely get a wideband. If you get the Pro data logger with HPtuners, it will accept the analog input from the wideband, and you can log it all into a HPT scan. That's the best thing for tuning. For your B1 B2 sensors, when I see that one is reading different from the other, I replace both of them, or do a leakdown test to see if you have a bad cylinder. They always vary a little bit, but if you are seeing +20 LTFT on one, and 0 on the other, there is no way to tune out of that, something is wrong with a sensor or a cyl..
TECH Resident
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From: Portland Oregon
Hunter, there is always some variation between the O2s. Can his tune be so bad that one sensor will read way different from the other? I'm thinking he has a bad sensor, but with his exhaust leak, all bets are off.
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TECH Apprentice
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From: milton florida
that log was after i pretty muck fixed the leak..if you put your hand down there know you can hardly feel anything at all coming from around the clamp..i was thinking it might be a sensor so im going to throw a new one in tomorrow
