low turbo boost

[doca69]

i have an 03 2500 with just under 240k miles. i just had an EGT and Boost gauge installed, fuel rail pressure is coming soon. at full throttle the most boost i am getting is 9psi. from what i have read i should be between 25-30. my egt's seem to be in normal range. i have 315/70/17 tires and a smarty on program 5, 90hp over. new fuel filter within the last 500 miles. were do i start looking to fix the lack of boost problem?



Nick

 

[NIsaacs]

That don't sound right, it should be a dog and have high EGT's numbers. What are they and are you pre or post turbo? Make sure your install of the boost gauge is all ok. Then check the waste gate and look for boost leaks. Nine PSI boost is way low.



Nick

 

[AH64ID]

I agree with Nick, it seems your gauge or installation is faulty.

When my IC was leaking and I went from 32 to 26 psi of boost my EGT's were thru the roof in seconds! And when I had an IC boot let loose I could build about 5-8 psi of boost but again the EGT's were thru the roof and I had no power.

 

[doca69]

the pyro is pre-turbo. on the highway i'm between 400-600, getting on it between 850-1050

 

[AH64ID]

the pyro is pre-turbo. on the highway i'm between 400-600, getting on it between 850-1050

With the Smarty on SW5 you should be seeing higher EGT's than that, assuming getting on it is WOT.



Based on those EGT's you don't have boost problem, you have a indication problem.

 

[SierraRam]

I agree you may have a leak in you tubing connection ant the manifold or gage. Does not take much of a leak in the small tubing to make a big difference on the indicated boost pressure.

 

[doca69]

the gauge is a glow-shift 3 in 1. i wasn't able to get the gauge installed for several months after i got it and i have since herd some not so nice things about those gauges. the gauge has a pressure sensor that relays back to the display electronically.

 

[doca69]

With the Smarty on SW5 you should be seeing higher EGT's than that, assuming getting on it is WOT.



Based on those EGT's you don't have boost problem, you have a indication problem.

WOT= with out trailer?

 

[AH64ID]

Wide Open Throttle

 

[NIsaacs]

Be careful using thread sealer on electronic sensors, they will not ground and give you a false reading.



Nick

 

[cerberusiam]

the gauge is a glow-shift 3 in 1. i

There is your problem. Get a good gauge and I bet you will see things are fine.



The Glowshifts are cheaper but terribly unreliable.

 

[seafish]

the gauge is a glow-shift 3 in 1.

That's likely the problem right there. :-laf