horrible mpg and weird idle drop
- Thread starter Gerbil21
- Start date
- May 28, 2014
- 839
Wow that's horrible and seeing how the resonator was connected to the exhaust I'm guessing it was a whole bolt on and the muffler may of been too I got to checkgmcman said:
Is the branding on top or bottom? the resonators's was on top making it impossible to see.
gmcman
Member
- Dec 12, 2011
- 4,673
The OE is a 1 piece welded unit, the Walker is in 2 pieces with bolt on flanges. I'm not sure if it's labeled on the top or not.
Here's my thread on it.
http://gmtnation.com/forums/topic/8397-just-installed-walker-quiet-flow-ss-exhaust/?hl=%2Bwalker+%2Bquiet+%2Bflow
Here's my thread on it.
http://gmtnation.com/forums/topic/8397-just-installed-walker-quiet-flow-ss-exhaust/?hl=%2Bwalker+%2Bquiet+%2Bflow
- May 28, 2014
- 839
Well it's been a while since I've posted here but so far from what I've done I have not gotten any noticeable mpg increase until a week ago.
Last week I took the throttle body from the 02 engine my brother got in his engine swap and replaced mines with it after a good cleaning. One thing I have noticed just by looking at the two was that on the original one the throttle plate goes past the top a bit. (I'll put a pic later) that gap would of had been enough to let extra air in which would of made the o2 sensor think it's lean which would add more fuel.
Since I've changed it, mpg's have increased from barley struggling low 9mpg to high 10's to low 11's also it drives a bit better too.
I've originally changed the throttle body for a 1-2 shift issue on the chance the TPS was bad but it wasn't, the shifts do feel a bit better thought.
Now I need to replace the map sensor too with the 02 sensor, My throttle body and intake was covered in oil when i first got the car so it could affect it and if it didn't and it still works good then it dosent matter either way.
Also I need to swap the 02 exhaust manifold since mines has a cemented in O2 with bad threads and the rear bolts are broken so the gasket would be leaking meaning bad O2 readings. I just need to get a new gasket, bolts, O2 sensor, and manifold studs
I have also been thinking of replacing the drive shift from a 02 since they all had aluminum drive shafts vs our steel driveshafts, I also need to get stock high springs for the rear.
Last week I took the throttle body from the 02 engine my brother got in his engine swap and replaced mines with it after a good cleaning. One thing I have noticed just by looking at the two was that on the original one the throttle plate goes past the top a bit. (I'll put a pic later) that gap would of had been enough to let extra air in which would of made the o2 sensor think it's lean which would add more fuel.
Since I've changed it, mpg's have increased from barley struggling low 9mpg to high 10's to low 11's also it drives a bit better too.
I've originally changed the throttle body for a 1-2 shift issue on the chance the TPS was bad but it wasn't, the shifts do feel a bit better thought.
Now I need to replace the map sensor too with the 02 sensor, My throttle body and intake was covered in oil when i first got the car so it could affect it and if it didn't and it still works good then it dosent matter either way.
Also I need to swap the 02 exhaust manifold since mines has a cemented in O2 with bad threads and the rear bolts are broken so the gasket would be leaking meaning bad O2 readings. I just need to get a new gasket, bolts, O2 sensor, and manifold studs
I have also been thinking of replacing the drive shift from a 02 since they all had aluminum drive shafts vs our steel driveshafts, I also need to get stock high springs for the rear.
- May 28, 2014
- 839
ok so just an update, took a trip upstate this weekend and averaged 18.6mpg. my brothers 05 tb got 20mpg,we both went around 75mph but i did have some catching up to do in traffic and got to 4k rpm about 3 times and also went 85mph about 5 times and 90mph about twice so considering that i got great mpg from a 4600lb suv with z71 springs giving a good bit of rake(bad for aerodynamics) and me and my mom 260lb and 150lb,
he has sagging rear springs so he is leveled and his weight was the same as us, the only difference between the trucks is his engine has 94k(replacement engine) iirc and has 16" rims vs my 17" rims both are 4wd with 3.42
he has sagging rear springs so he is leveled and his weight was the same as us, the only difference between the trucks is his engine has 94k(replacement engine) iirc and has 16" rims vs my 17" rims both are 4wd with 3.42
- May 28, 2014
- 839
Well it's been forever since I've updated this but not much has changed
I've only done a oil change
I have also been having a problem with the car being sluggish when warm but I've seemed to have fixed it by removing the intake snorkel which was a crap design either way
I have also been adding tc-w3 to the gas tank as a well known fuel additive, I've only just started the second tank so I should start seeing results by the end of this tank.
http://www.ls1.com/forums/f48/been-testing-oil-91206/
I've only done a oil change
I have also been having a problem with the car being sluggish when warm but I've seemed to have fixed it by removing the intake snorkel which was a crap design either way
I have also been adding tc-w3 to the gas tank as a well known fuel additive, I've only just started the second tank so I should start seeing results by the end of this tank.
http://www.ls1.com/forums/f48/been-testing-oil-91206/
