Truck problem high egt laggy no smoke.

95.12v.Cummins

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Jun 21, 2011
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Hello all! I've got a couple questions about an issue that I'm having with my Dodge.
Its a 1995 Dodge Ram 2500 nv4500 trans.
The problem I'm having happend suddenly, the egts are getting high(800-900 while easily driving around town and on the highway. Where as before running around town egts were from 500 to 650 maybe 700(egt probe behind turbo) The problem started when I noticed one of my injectors were leaking out of the top of the hold down nut, I took them out and the problem injector was leaking where the two halves screw together, the entire bottom half of the injector was covered in fuel. I took them all down to a local fuel injection shop and had them check them out, they all pop tested good and they found no leaks.
I reinstalled them and still had the high egt problems.
on a side note there is a tapping/ticking sound coming from the front of the engine sounds like the head when the engine is running.
The injectors are 90 horse.
I've checked the valves(thinking the adjustment is off)
fuel pressure is normal with a tork tech overflow valve.
I have changed the air filter and fuel filter. The truck starts as it always has.
The turbo I have on it has no wastegate as I though it could be stuck open and it has been on before I had the problem. If I get on it boost pressure will go up to 30-35 fairly quickly but I have to let off due to egts hitting 900 and I dont want to cause any damage.
One thing I was thinking was that the leaky injector is dumping fuel into the cyl thus causing high egt...but if I had an excess of fuel I think it would bellow black smoke...
I remember reading that where the egt probe is located varies for max temp. I think it was Dodgeram.org.
That 1250degs in the exhaust manifold and 900degs in the turbo elbow.
With my egt issue is that it happend suddenly when the injector was leaking. Before this issue I would cruise on the highway with my temps about 650-700, 800 getting on it even with a trailer in tow, now I am hitting 800-900 not getting on it with nothing behind me... I have also pressure tested my intake system from the turbo and found no leaks.

:bang
I'm at a loss of what to check next... any pointers would be extreamly helpful as the one diesel shop that I truck is about 2 weeks out and I'm tight on money.

Thanks for the help in advance!
 
Your injector isn't sealing up probably. Make sure all your injectors are sealed. Your ticking noise could have been from the leak. You're probably not getting enough fuel which is causing it to get hot because its running lean. I would check all your injectors really good and make sure your lines aren't leaking as well
 
Well today I've checked the injectors, injection lines and fuel shut off solenoid, the ticking noise sounds like its coming from the Injection pump... If the inj pump is failing it could be causing my truck to run lean due to not getting enough fuel to the injectors, does this sound right? What are some symptoms of a failing inj pump?
 
Maybe a year ago I put a new lift pump on it, and the fuel pressure with the tork teck valve spikes from 20psi to 40psi and hovers around 30psi(has since I put the new tork teck valve and lift pump on.), and I listened to the lift pump and it sound fine while the ticking is coming from the Injection pump...
 
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