overboost problem

[phoon684]

I took the truck for a ride and jump on it felt like i hit fuel cut then check engine light came on and had code 31 and 33 ,overboost and map sensor ,just need to get pointed in the right direction to solve this problem since this is all new to me.

 

[Falco]

Well. This could come from a bunch of things. First of all, what kinda mods do you have? Stock turbo? Full exhaust? Do you have a cat? Stock chip? Any kind of boost controller?

If I assume your truck is completely stock, I'd suggest to check the two vacuum lines around the solenoid on the top of the turbo, stucking waste gate, non working actuator, missadjusted WG rod.

And get a service manual from Helm and/or a Service CD from sportmachines.com.

Peace,

 

[Nick NY]

couldnt the weather have something to do with overboost? I was told that in extreme cold conditions overboost can happen.

 

[kwick6]

couldnt the weather have something to do with overboost? I was told that in extreme cold conditions overboost can happen.

when are you getting the overboost?

need to know what chip you have, and what mods you've done.


yes, you can get higher boost in cold weather. some have had issues when running the heavier spring in the actuator, getting 17-18 psi on cold days, when it should be around 15 psi base.



someone was going to look into the effects of temp, and possibly change some stuff in calibration to correct the issue...don't know if it was done or not.

check this thread out, could also be related....
http://www.syty.net/phpBB2/viewtopic.php?t=11170

Scott