Engine Vacc leak detector

[Creomod]

Ok so I had a code 41 replaced o2 sensors and the code went away when I replaced the afr sensor but…… my car still runs ragged and I drive it no check engine light. Now I bought the smoke machine and I’m getting smoke coming out 3 areas. The gasket intake to throttle,the intake to egr the gasket and I see it coming out the center of the tps sensor. I do belive the plastic price is in there. Is that normal? It a new sensor I just bought it .

 

[AeroCoupe]

I’m thinking the smoke around the EGR is actually coming out of it. I want to say several folks have experienced this and even new units have done it. TPS leak is not normal. Biggest culprit is the TB to upper intake leak.

 

[Creomod]

I’m thinking the smoke around the EGR is actually coming out of it. I want to say several folks have experienced this and even new units have done it. TPS leak is not normal. Biggest culprit is the TB to upper intake leak.

You’re saying maybe the gasket from tb to upper? Shiukd I use silicone? The TPs one is killing me

 

[AeroCoupe]

I would just use a regular gasket. Chances are the mating surfaces are not flat. You can check that with a straight edge and if either one is not flat then use a flat plate (some use thick glass and some sand paper (be smart and use something like 300+ on the grit and work your way to 600 for a finish) to make them flat. Once you do that then install the paper gasket and in small increments snug the TB to the upper intake.

As far as the TPS goes I would remove the TPS sensor and see if the smoke is actually coming from the throttle blades shaft to the TB body seal.

 

[Mustang5L5]

EGR leaks are typically but it all depends where the leak it. Leaking at the diaphragm is a vac leak that should be fixed. Leaking from the pintle seal is not a vac leak and common. EGR system is positive pressure during use, and minor leaks are typical. Cleaning the pintle may help create a better seal there. I’ve had a brand new ford NOS EGR leak smoke past the pintle.

TPS leaks seem to be more common on aftermarket units vs oe units. I have seen them leak but can’t recall off the top of my head the design difference that causes this.