Board index i2/i3 Technical discussion i2/i3 for Dodge, Chrysler, Jeep and Ram Completely stock CSRT4 overboosting

Completely stock CSRT4 overboosting

Post here with any questions specific to the use of the i2 on Chrysler vehicles.

Moderator: sohfast94

Post Sun Oct 07, 2018 8:38 pm

Posts: 7
Have the i3 and tuned on 93 car has good power
And responds nicely but if I go WOT or anywhere close
Boost spikes to 20 and over boosts its feels terrible
Car is completely stock and iv got no leaks waistgate
Is good and vacuum lines are good same with plugs I put the car back
Stock and drive around a while and it boost perfect and
As it should I reset the adaptives and tuned it back to 93
And no change still overboosting I turned the boost down 10%
And it still overboosts can someone please help

Post Sun Oct 07, 2018 10:09 pm

Posts: 4
I am having the same exact issue! I just got my Trinity T2 EX Platinum on Saturday and applied the Diablosport tune. The car is pushing out way too much boost and causing it to choke. It drives but I can’t go WOT on any tune other than the factory. I tried adjusting the 93 octane tune’s Wastegate setting to 25% (2k-4k) & 25% (4k-7k). Still overboosting like crazy in 3rd, 4th, 5th, and 6th gears. I am holding 5PSI in 2nd gear at WOT after the adjustment.

I am looking for no more than 15PSI across all gears on a semi-stock Caliber. I thought I should be able to customize the 93 Octane tune’s Boost parameter to 75% to achieve this. Hope there is a solution.. otherwise I wasted $599!

Post Mon Oct 08, 2018 1:37 am

Posts: 7
I do know that depending on what mods you have could also be the reason for overboost
Such as aftermarket waistgate or BOV if it’s not the stock waistgate then your not on pcm
Controlled boost a cat less dp could even be a factor but I’m completely stock I had a boost leak
Before and it wasn’t letting me boost past 8psi got the leak fixed and I can boost 12 psi now but
With the 93 tune I overboost

Post Mon Oct 08, 2018 4:37 pm

Posts: 7
mikel could you please help me out please this overboost problem is getting old :drivingbad: :blowup:

Post Tue Oct 09, 2018 12:00 pm

Posts: 4
I just got off the phone with the tech support @ DiabloSport and they said the Trinity T2 is not compatible with the CSRT4. I'm looking to RMA mine in for the i3. Are you using the i3 or T2?

Post Tue Oct 09, 2018 1:59 pm

Posts: 7
Iv got the i3

Post Thu Oct 11, 2018 6:16 pm

Posts: 4
I'll be swapping out my T2 for the i3 in a few days. I'll let you know how the Diablo tune works on my car. I plan on having an actual tuner do a custom tune though. Every car is unique and deserves a custom tune imo.

Post Thu Oct 18, 2018 10:12 pm

Posts: 7
Hi did you get it if so how’s it doing


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