94.5 7.3 egt issue? - Ford Powerstroke Diesel Forum
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Old 06-26-2012, 08:35 AM
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94.5 7.3 egt issue?

ive got 94 cclb 4x4 powerstroke 5spd

its got a diy intake with k+n filter
3in down pipe.. to a 6ft section of 3in strait pipe..

my question is ..

is it normal to have egt between 800 and 1000 with small hills or around town driveing
unloaded?

if i get into it at all seems like i can get to 1100 with ease..

seeing if this is normal because im picking up a 26ft toyhauler this weekend and i dont wana have to drive around at 35mph to keep egts from spikeing

thanks
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Old 06-26-2012, 09:17 AM
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Seems a little high w/out a load. First of all, ditch that POS k&n. That might be hurting your egt's, and its certainly hurting your motor and turbo.

these trucks handle egt's very very well... so I find that a little high for not having any mods.


Actually, come to think of it I think I found our issue. 3" straight pipe? What the hell? thats smaller than the STOCK exhaust.. why is that tiny piece of **** on your truck?
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Old 06-26-2012, 09:28 AM
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as far as the exaust it had a full length 3in strait pipe on it when i got it.. i know its smaller than the stock thats why i cut it off at the back of the cab for now.. till i get a 4in kit

so mostlikley its the damn exaust killing the egts?
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Old 06-26-2012, 11:54 AM
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Could be. The factory exhaust is 3" from turbo to just before the CAT inlet, where it bells out to 3.5" the rest of the way (not counting the factory flattened DP). Cheers!
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Old 06-26-2012, 02:00 PM
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Quote:
Originally Posted by foxfamilycustomz95f350dsl View Post
as far as the exaust it had a full length 3in strait pipe on it when i got it.. i know its smaller than the stock thats why i cut it off at the back of the cab for now.. till i get a 4in kit

so mostlikley its the damn exaust killing the egts?
Very very possible. I'd be willing to bet on it.

Do you have a 3" downpipe? Do that in the meantime also.
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Old 06-26-2012, 02:03 PM
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ya they went to a 3in down pipe.. and continued one size all the way back..

so i removed it up to the back of the cab and put a turn down on it for now..

im looking at local parts stores rite now for a 6637 air filter also..
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Old 06-26-2012, 02:43 PM
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Good start
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Old 06-26-2012, 02:53 PM
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The EGT sending unit is in the exhaust manifold and not in the down pipe right? Also look at your intake y-pipe o-ring and boots. Make sure the clamps are all tight and they are not cracked and leaking. Feel to the back as they'll tend to crack where you can see them. Then move to the plenums and look for blowout at the mating surface to the head. Leaking boost can cause high EGT's as the escaping air is not being added to the fuel in the cylinder.
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Old 06-26-2012, 02:57 PM
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im 99% sure i got no exaust leaks.. and boost seems normal for an obs truck.

18psi ive seen .. normal seems 10 to 12 on my truck ..

pryo gauage is new and installed in the manifold correctly
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Old 06-26-2012, 03:09 PM
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^not exhaust leaks intake leaks. I missed checking my IC boost tubes on my bi-yearly maintenance check on my truck and found three loose hose clamps. It was after synching them back up that I had a quicker response and EVEN Lower EGT's form the truck. Drove with it so long I didn't realize what I was missing. A little leak goes a long way. In good working order stock max boost aught to be in the 21-25 psi area.
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