0psi of boost !!!!

[rbundy112]

I have a 19’ 3.3 that I just install a 50mm TiAL and the JB4 on. The car makes 0 boost. If I disconnect the tuner it still makes 0 boost. I have triple checked the intake manifold, vacuum lines, air intake, wiring, etc. Any ideas??

 

[G70LEbyAdoom]

....Did you take that log in park? Your speed went from all of 0mph to 0mph, not to mention the pedal and throttle position didn't hit more than 50% through the entire thing.

 

[rbundy112]

....Did you take that log in park? Your speed went from all of 0mph to 0mph, not to mention the pedal and throttle position didn't hit more than 50% through the entire thing.

Yeah it was in park.

 

[G70LEbyAdoom]

Yeah it was in park.

I mean, that's your problem then, the car doesn't build boost in park. The only reason you see 0.2psi in a small section is because that is the increase in air from the engine sucking it in itself.

 

[rbundy112]

I mean, that's your problem then, the car doesn't build boost in park. The only reason you see 0.2psi in a small section is because that is the increase in air from the engine sucking it in itself.

Even driving it builds no boost, the BOV never even actuates.

 

[GennyGuy]

I mean, that's your problem then, the car doesn't build boost in park. The only reason you see 0.2psi in a small section is because that is the increase in air from the engine sucking it in itself.

You can build boost in park. Not peak boost, but a lot more than 0.2.

 

[G70LEbyAdoom]

You can build boost in park. Not peak boost, but a lot more than 0.2.

really? ive never seen the car build boost in park, no matter how much I rev it.

 

[GennyGuy]

Even driving it builds no boost, the BOV never even actuates.

I've had this happen when the car senses a problem. It's usually air/fuel ratio the ecu doesn't like and has happened to me after a WOT. More common for me when it's been colder weather (below 50 degrees). What other mods do you have?

 

[GennyGuy]

really? ive never seen the car build boost in park, no matter how much I rev it.

I can't hold boost like I would be able to in drive, but here's a video from my driveway. You'll see that it repeatedly hits 10+ psi. Honestly I think I was just bored that day. Was December 2021, so please forgive for not remembering exactly why I was out there. I usually take a staycation around that time of year.

 

[rbundy112]

I've had this happen when the car senses a problem. It's usually air/fuel ratio the ecu doesn't like and has happened to me after a WOT. More common for me when it's been colder weather (below 50 degrees). What other mods do you have?

Typhoon intake, correct plugs, and the JB4.

 

[GennyGuy]

Typhoon intake, correct plugs, and the JB4.

Does it have the JB4 fuel wires? Those were causing a problem for me, once I disconnected them my issue went away.

 

[rbundy112]

Does it have the JB4 fuel wires? Those were causing a problem for me, once I disconnected them my issue went away.

It doesn’t have the fuel wire bridges, but the wires with taps into the O2 wires.

 

[Thomby]

I can't hold boost like I would be able to in drive, but here's a video from my driveway. You'll see that it repeatedly hits 10+ psi. Honestly I think I was just bored that day. Was December 2021, so please forgive for not remembering exactly why I was out there. I usually take a staycation around that time of year.

I don't think you're really building boost there, just slamming the throttle shut which lets your (very minimal) intake flow spike the pressure momentarily. With no load on the engine, you just don't have sufficient airflow to really spool up.

 

[Rodtheviking]

Put the OEM bov's back on and try again. If that doesn't solve it then try the waste gate actuator valve on the intake runner to the throttle body, those have been known to go out.

 

[GennyGuy]

It doesn’t have the fuel wire bridges, but the wires with taps into the O2 wires.

Are you referring to either of these?

JB4 Stinger Fuel Wires ADD-ON

These extra wires plug into the JB4 harness allowing it to tune your air/fuel ratios, leaning the tuning out at higher RPM has resulted in significant additional power gains. Note new JB4 systems include these wires in the harness already.

burgertuning.com

Kia/Hyundai/Genesis JB4 PNP Fuel Wire Adapter

These plug and play quick install adapters allow you to install a posi-tap for fuel control tuning without piercing the factory o2 sensor wiring providing a completely reversible connection.

burgertuning.com

 

[GennyGuy]

I don't think you're really building boost there, just slamming the throttle shut which lets your (very minimal) intake flow spike the pressure momentarily. With no load on the engine, you just don't have sufficient airflow to really spool up.

I agree with you. It would have been better to have used a different phrase when I was answering.

The problem that OP is describing I have had however, where you're not even able to see throttle closure as you're seeing in my video. I did acknowledge in my answer that this is different than what you would see while being in drive. I got rid of fuel wires and problem disappeared.

 

[rbundy112]

I agree with you. It would have been better to have used a different phrase when I was answering.

The problem that OP is describing I have had however, where you're not even able to see throttle closure as you're seeing in my video. I did acknowledge in my answer that this is different than what you would see while being in drive. I got rid of fuel wires and problem disappeared.

okay I got rid of the fuel wires, installed the OEM bov’s the oem valves worked for two seconds and now I’m back to not producing any boost.

 

[Hawk853]

okay I got rid of the fuel wires, installed the OEM bov’s the oem valves worked for two seconds and now I’m back to not producing any boost.

Does it sound like the waste gates are wide open?

I had a vacuum blockage that created absolute havoc and the waste gates would open wide as a fail safe.

 

[Snicklefritz]

(I keep seeing the op title as 'oopsie', lol)

 

[rpoffen]

okay I got rid of the fuel wires, installed the OEM bov’s the oem valves worked for two seconds and now I’m back to not producing any boost.

Make sure the BOV actuator solenoid is plugged in, there is an electrical connector, and when I first put my GFB BOV's on, I forgot to hook the connector to that solenoid back up, and it wouldn't build boost. Also, make sure the vacuum lines from the solenoid to the BOV is OK and not damaged or leaking.