Boost pressure and EGT readings
#1
Registered User
Thread Starter
New Turbo?? Was: Boost pressure and EGT readings
Now that I have my EGT and boost gauges in place, I am struggling to keep my eyes OFF them while driving. But I have questions now, showing my diesel performance ignorance.
What should I be seeing for readings?
WOT, I am at about 24 pounds of boost? I tapped into the intake via the plug on the DS, back end of the engine? Since the gauge is 0-35 psi, I assume that 24 is a good number. My mechanic friend who helped me put it in (ok.. I helped HIM) was unfamiliar with the readings as well. He's used to 10-14 pounds seen in car turbos.
Also, the EGT needle is a busy little bugger. Cruising at 74 on the interstate unloaded I was up in the 800 degree range or so. At idle this morning, was somewhere in the 250 - 300 range?
What should I be seeing for readings?
WOT, I am at about 24 pounds of boost? I tapped into the intake via the plug on the DS, back end of the engine? Since the gauge is 0-35 psi, I assume that 24 is a good number. My mechanic friend who helped me put it in (ok.. I helped HIM) was unfamiliar with the readings as well. He's used to 10-14 pounds seen in car turbos.
Also, the EGT needle is a busy little bugger. Cruising at 74 on the interstate unloaded I was up in the 800 degree range or so. At idle this morning, was somewhere in the 250 - 300 range?
#2
Your boost sounds a little high. Do you have some sort of fueling box on your truck? Most stock trucks run around 18-20 psi. Your EGT's sound normal for a pre turbo gauge. You did mount your probe pre turbo right?
#4
Chapter President
24 psi is high for a stocker.....it should be gated for 20 psi - 22 psi tops.....do you have a 0234 DTC? ....might want to check for that code - it's the overboost code and it could mean you have a sticky wastegate......the ECM will defuel past 20 psi......
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#11
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Join Date: Nov 2003
Location: Chattanooga, TN
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My first boost gauge was about 1-2lbs high. It was an Isspro EV. It sat at about 1-2 even when off and I could make it show about 21+ at WOT.
I sent it back and the new one works correctly. So yes, it could be the gauge itself.
Steve
I sent it back and the new one works correctly. So yes, it could be the gauge itself.
Steve
#12
Registered User
Thread Starter
Ok. 0234 ECU?? IS that the same thing?
Also had a 1693 PCU pulled too. Any idea what this one is??
I have an LOF appointment on Thursday so I will have them check these codes to see what they say.
Any advanced knowledge would be supremely helpful.
thanks guys!
Also had a 1693 PCU pulled too. Any idea what this one is??
I have an LOF appointment on Thursday so I will have them check these codes to see what they say.
Any advanced knowledge would be supremely helpful.
thanks guys!
#13
Administrator
Originally posted by xp8103
Ok. 0234 ECU?? IS that the same thing?
Also had a 1693 PCU pulled too. Any idea what this one is??
I have an LOF appointment on Thursday so I will have them check these codes to see what they say.
Any advanced knowledge would be supremely helpful.
thanks guys!
Ok. 0234 ECU?? IS that the same thing?
Also had a 1693 PCU pulled too. Any idea what this one is??
I have an LOF appointment on Thursday so I will have them check these codes to see what they say.
Any advanced knowledge would be supremely helpful.
thanks guys!
P1693 is the code thrown in the PCM when there's a code in the ECM that the PCM can't see.
When you get it scanned you might find another code hidden in there,
or it might just be a leftover.
phox
#14
Chapter President
I'm going to stick with my original diagnoses that the ECM is giving a 0234 DTC because of a sticky wastegate....it is still a good idea to have it scanned anyway to make sure there isn't another DTC hidden behind that annoying 1693 DTC!