Need help asap..p0171 after o2 sim install

[slowchevy]

LTFT is at 16%, so you're definitely adding fuel for some reason. There could be a lot of reasons why. A Vacuum leak, clogged/restricted injector, bad o2, restricted fuel filter, bad MAF. The list goes on. Hopefully the o2 you ordered will fix it. If not, I would check for a Vac leak, since someone said you just did your gaskets.

to my knowledge, it's on the original fuel filter.. I'll need to get one and get under there and do it along with PCV and maybe even clean the throttle body.

Could a rubber throttle body gasket do this? I have a paper one I could use but I figured since the coolant flow was blocked to the upper intake, the rubber one I had from ages ago would work just fine.

 

[Yaj Yak]

torque app for android.

ahhhh hhhahhhhh thats what i was

wondering. neat.

LTFT is at 16%, so you're definitely adding fuel for some reason. There could be a lot of reasons why. A Vacuum leak, clogged/restricted injector, bad o2, restricted fuel filter, bad MAF. The list goes on. Hopefully the o2 you ordered will fix it. If not, I would check for a Vac leak, since someone said you just did your gaskets.

vac leak fo shooooow. he just did a bunch of work to it...

Except tax with a new (to you) vehicle is way the fuck more. Was going to get plates for my new whip but Illinois ended up being a good deal cheaper. $25 vs 10% sales tax

 

[Yaj Yak]

id be dumping carb cleaner all over the bitch to find the vac leak your car has.

 

[l0wb00st]

to my knowledge, it's on the original fuel filter.. I'll need to get one and get under there and do it along with PCV and maybe even clean the throttle body.

Could a rubber throttle body gasket do this? I have a paper one I could use but I figured since the coolant flow was blocked to the upper intake, the rubber one I had from ages ago would work just fine.

Check for a Vacuum leak first, it's the most likely to be causing the problem since you just worked on it. Take a can of starting fluid, or carb cleaner/ something flammable and start spraying around the intake manifold. If you hear the revs change when you spray in a certain spot, you've found your leak.

id be dumping carb cleaner all over the bitch to find the vac leak your car has.

Yep, exactly what I would do

 

[DanJ]

16.4 is maxed out for that scanner I'm guessing. My aero force is the same way. James was saying the LTFT's actually can go as high as 40 something but you need a different kind of scanner to read it. Regardless like everyone is saying you have a vac leak. I'd try the starter fluid thing or at least try putting the paper gasket in for the TB. I don't know a whole lot about those rubber ones, but I'm guessing the torque spec for the throttle body assumes a stock gasket.

 

[b4black]

Smoke test. This guy found leaks at threee injectors (you already found one).

P0171 - How I Fixed It - RegalGS

 

[slowchevy]

id be dumping carb cleaner all over the bitch to find the vac leak your car has.

what. won't that start my shit on fire.

 

[Yaj Yak]

no. it won't. it'll kill the engine when you hit where your vac leak is though and then maybe you can get this shit taken care of and 14 threads a day will stop

 

[smug]

to my knowledge, it's on the original fuel filter.. I'll need to get one and get under there and do it along with PCV and maybe even clean the throttle body.

Could a rubber throttle body gasket do this? I have a paper one I could use but I figured since the coolant flow was blocked to the upper intake, the rubber one I had from ages ago would work just fine.

I am not sure where you found a rubber TB gasket for a stock L67 but now that you say that I would look there first. I have always seen a brown paper gasket with the orange sealant stuff.

Test with carb cleaner or starting fluid first and you can always make a hillbilly RTV gasket if needed

 

[SaturdaysGS]

I am not sure where you found a rubber TB gasket for a stock L67 but now that you say that I would look there first. I have always seen a brown paper gasket with the orange sealant stuff.

Test with carb cleaner or starting fluid first and you can always make a hillbilly RTV gasket if needed

Is the L32 top end the same way? I remember using a rubber (blue in color iirc) O-ring / gasket dealio between the TB and supercharger. Am I missing something? It had a TB spacer from the PO so I removed that as the motor was sippin on that 50/50 water/coolant.

 

[smug]

Is the L32 top end the same way? I remember using a rubber (blue in color iirc) O-ring / gasket dealio between the TB and supercharger. Am I missing something? It had a TB spacer from the PO so I removed that as the motor was sippin on that 50/50 water/coolant.

I am not sure about the L32

 

[TommyGloves]

LTFT is at 16%, so you're definitely adding fuel for some reason. There could be a lot of reasons why. A Vacuum leak, clogged/restricted injector, bad o2, restricted fuel filter, bad MAF. The list goes on. Hopefully the o2 you ordered will fix it. If not, I would check for a Vac leak, since someone said you just did your gaskets.

x2...LTFTs are maxed at 16.4% plus the STFTs show +9%.

Make sure your oil cap is on and tight. That can also suck in unmetered air.

 

[Turbocharged400sbc]

DBW 04+ and l36 use silicone rubber o-ring gaskets

don't forget that a broken dipstick handle will cause an unmetered air leak at the PCV system too

 

[DanJ]

Hmmm sounds like I need a new dipstick for the GF's GP.

 

[slowchevy]

I am not sure where you found a rubber TB gasket for a stock L67 but now that you say that I would look there first. I have always seen a brown paper gasket with the orange sealant stuff.

Test with carb cleaner or starting fluid first and you can always make a hillbilly RTV gasket if needed

Got it from @DOC_Z (however you spell his name) when I bought a big bore TB.

Kept it when I sold the TB. Here it is on ZZP. I figured I'd use that even though I blocked off the coolant passages so stuff wouldn't stick together.


http://shop.zzperformance.com/store/p/994-Rubber-L67-Throttle-Body-Gasket.aspx

 

[Xtant12]

This worries me because I just got the emissions notice!!!!