Help! not sure whats going on?

[lynnriderm6]

ok so its pritty cold outside so im not sure whats going out...but my car was only at about 8-10psi but it was also 9degrees out lol so im not sure if its because of the weather? i mean i have a new tmic ets 3.25..i check the intercooler tubes to see if there was a leak nothing...any ideas??

 

[lynnriderm6]

no 1?

 

[Blendercloud]

You have to give us more information than this. Was the car at full operating temperature? What RPM's did you experience the drop in boost? Were you driving it hard? What gear(s) did you experience the problem?

 

[lynnriderm6]

it was fully warm.. 2nd and 3rd gear between 4-6000 rpm and yes i was driving it hard...but this morning i tried it out and it was 15-16psi and drop to 14-15psi after like 5300rpm like normal idk lol maybe idk lol

 

[Blendercloud]

It sounds like boost cut to me at those RPM's and that cold of atmospheric temperature. This is normal for really cold weather. As it gets colder, the air becomes more dense. Your intercooler will also become more efficient. The more dense your turbocharged air becomes, the more fuel your car will have to deliver in order to maintain optimum air-to-fuel ratios.

What I believe you have experienced is boost cut. This means that your turbocharged air is so dense that your fuel pump cannot properly keep up. The ECU sees this in the form of a spiking AFR (you're leaning out). As it detects this, it opens the wastegate to slow your turbo's boost production. It's at this point that you're feeling a loss of boost.

 

[crlsnlopes]

^^^what he said. since i changed to my fmic i;ve noticed the same thing. i'll be ordering the ptp fp soon.

p.s. get the ap soon, this way u can datalog, and dont have to deal with cold cuts

 

[lynnriderm6]

lol ya you think the ap will help? i had no issues this morning

 

[Blendercloud]

The AP may help to a certain extent, but essentially... that is the downfall of forced induction. As the atmospheric temperature drops, you will see power and efficiency gains until you get to a point where the car just isn't capable and scales itself back.

 

[lynnriderm6]

ya its been fine i just think of the wicked cold temp screwed with it

 

[USAFVMI08]

It's been happening to me a lot out here since it's gotten colder. I've learned to deal with it/not drive as hard