Tonyrodz's Tahoe Build Thread

[Tonyrodz]

I hope this is what was requested @Fless .

 

[Tonyrodz]

More-

 

[Scottydoggs]

are you driving it during these scans or just holding the gas? being under load can change things, vs revving it.

the ltft are rich, might have a vac leak or the tune was set up to be rich.

the o2's look good as far as being very active, the test for them is go wot and bank 1 and 2 sensor 1 should lock in around 930's and stay there the whole time your wot.

misfires, well ya got a cam. why tuners delete the multiple misfire code from the tune. or the cel would be flashing all day long on most larger cams.

 

[Tonyrodz]

are you driving it during these scans or just holding the gas? being under load can change things, vs revving it.

the ltft are rich, might have a vac leak or the tune was set up to be rich.

the o2's look good as far as being very active, the test for them is go wot and bank 1 and 2 sensor 1 should lock in around 930's and stay there the whole time your wot.

misfires, well ya got a cam. why tuners delete the multiple misfire code from the tune. or the cel would be flashing all day long on most larger cams.

Sorry I didn't clarify @Scottydoggs this is my work van. I was sitting still bring the revs up. This van has given me heartache from day 1!

 

[kbuskill]

are you driving it during these scans or just holding the gas? being under load can change things, vs revving it.

the ltft are rich, might have a vac leak or the tune was set up to be rich.

the o2's look good as far as being very active, the test for them is go wot and bank 1 and 2 sensor 1 should lock in around 930's and stay there the whole time your wot.

misfires, well ya got a cam. why tuners delete the multiple misfire code from the tune. or the cel would be flashing all day long on most larger cams.

LTFTs are rich???

I thought positive numbers meant lean, which would indicate a possible vacuum leak.

My understanding is that the positive numbers mean that the ECU is calling for 9% more fuel (as an example). A negative reading would indicate that it was rich and the ECU was calling to reduce the fuel by -9% (as an example).

Maybe we are saying the same thing in a different way OR maybe I am mistaken. Not trying to confuse, just trying to verify my thinking is correct.

 

[George B]

LTFTs are rich???

I thought positive numbers meant lean, which would indicate a possible vacuum leak.

My understanding is that the positive numbers mean that the ECU is calling for 9% more fuel (as an example). A negative reading would indicate that it was rich and the ECU was calling to reduce the fuel by -9% (as an example).

Maybe we are saying the same thing in a different way OR maybe I am mistaken. Not trying to confuse, just trying to verify my thinking is correct.

Your saying the same thing. It appears to be adding fuel to compensate for unmetered air.

 

[George B]

Noticed the short term trims are normal for idle.

 

[Scottydoggs]

LTFTs are rich???

I thought positive numbers meant lean, which would indicate a possible vacuum leak.

My understanding is that the positive numbers mean that the ECU is calling for 9% more fuel (as an example). A negative reading would indicate that it was rich and the ECU was calling to reduce the fuel by -9% (as an example).

Maybe we are saying the same thing in a different way OR maybe I am mistaken. Not trying to confuse, just trying to verify my thinking is correct.

your right, i got it backwards. and lean would mean a vac leak. could also cause some misfires.

 

[Tonyrodz]

So possibly a vacuum leak? Could that also cause a really low idle?

 

[Rocket Man]

I did drive it today, but I couldn't take it through its paces unfortunately. My gf was with me and she has some serious issues with her neck and spine--plates and screws--but hopefully I'll be able to soon.

New issues with her or old? You’ve been through a bit yourself lately so I hope you weren’t both laid up at the same time?

 

[Tonyrodz]

New issues with her or old? You’ve been through a bit yourself lately so I hope you weren’t both laid up at the same time?

Just a continuation of old ongoing issues for her. As for me I'm invincible!! Til I die anyway lol.
On the way home I was alone, and I took a sharp curve jumping on the pkwy. I did notice it handled alot better, but I have 265 70's so there's still a little sidewall flex. It would've handled alot better with some 22's--but I sold them--don't regret it either!

 

[kbuskill]

So possibly a vacuum leak? Could that also cause a really low idle?

Usually a vacuum leak will cause a higher idle.

 

[George B]

Usually a vacuum leak will cause a higher idle.

Wouldn’t it also result in negative numbers on the STFT too?

 

[Fless]

Wouldn’t it also result in negative numbers on the STFT too?

No, with a vacuum leak more (read: unmetered) air is getting into the system. System has to add fuel to compensate, so positive fuel trims.

 

[George B]

No, with a vacuum leak more (read: unmetered) air is getting into the system. System has to add fuel to compensate, so positive fuel trims.

Your right. I’m done for the day. I’ll see myself out…

 

[Rocket Man]

are you driving it during these scans or just holding the gas? being under load can change things, vs revving it.

the ltft are rich, might have a vac leak or the tune was set up to be rich.

the o2's look good as far as being very active, the test for them is go wot and bank 1 and 2 sensor 1 should lock in around 930's and stay there the whole time your wot.

misfires, well ya got a cam. why tuners delete the multiple misfire code from the tune. or the cel would be flashing all day long on most larger cams.

I’m wondering if the reason I keep getting the random misfire code on my Denali is the cam then. Although it didn’t do it for over a year, now it does it on occasion.

 

[George B]

Does this thing have a MAP sensor? How does that play into the fuel metering?

 

[Tonyrodz]

Does this thing have a MAP sensor? How does that play into the fuel metering?

It does and I replaced it--no change.

 

[Scottydoggs]

I’m wondering if the reason I keep getting the random misfire code on my Denali is the cam then. Although it didn’t do it for over a year, now it does it on occasion.

might when it gets hot. that pesky p0300 code should be deleted with a cam. the lope and chop is pretty much a misfire, sooo lol you have a blower on that truck too? might need new plugs if running copper core plugs, they only last like 12-15,000 miles. puts you back on the old school days of a tune up once a years.

 

[Tonyrodz]

Hot AF today, and Mon/Tue is gonna be hotter, so if course I cleaned my front carpet and front seats. Carpet is much better, but not what I expected. I was gonna get the oem rotors cut--@$25 a piece, but then saw these--
I also ordered some GM abs sensors--so I thought. Looks to be only 1.