Wierd Boost Issue - Ford Powerstroke Diesel Forum
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Old 04-11-2011, 11:45 AM
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Wierd Boost Issue

Ok, so my truck is acting wierd lately and im not sure whats going on.

I had a basically stock truck other than gauges, 6.0 intercooler, 6673 intake and a cut off at DP stock exhaust with a TS chip. Before this weekend EGTs would average 800 or so just cruising on the highway.

Well over the weekend I went to a 7.3 van turbo, wicked wheel, and a straight pipe 4" exhuast. The rest of the stuff is still the same.

Well now my truck will hit 24-25 psi and then if I let off and try to get back in it, it will go real slow up to around 15 psi or so. Then if I switch the setting on the chip and get back into it, it will do the same thing 25 and then barely anything. Also after the install the EGTs went up to around 1k just cruising which makes no sense after going to a bigger AR housing and a bigger exhaust.

I was considering changing the gaskets on the up pipes and got 2 bolts off and then couldnt get the others so I just tightened the bolts back up and didnt change them. It looks like I can see a little bit of soot on the pipe like it may be leaking some.

But Im wondering does it sound like something is wrong with my chip since I can switch it and get it to boost again (it also died on me for the first time tiday while changing tunes). Or does it sound like up pipes? Im trying to figure it out as best as possible because I dont want to just throw money around I dont have.

I was considering buying a water meth injection kit and getting my chip retuned by TW but now that I see that soot on the up pipe Im wondering if that could also be it because before I could get 26psi or so and hold it there on the stock turbo.

So im trying to narrow down what it would be without wasting money I dont have.
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