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1994.5 - 1997 7.3L Power Stroke Diesel  

Injector issues??

Old Feb 1, 2020 | 04:52 PM
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Injector issues??

Im trying to chase down what i think is an injector on its way out, i took the ol' laser temp gun to my manifolds and everything was withing 15 degrees of each other, except for cylinder #1 & #3... #3 read like 30 degree lower than the others, and #1 read about 80 degrees lower.. Anyone think i need two new injectors? (Im going to replace all 8 rather than just 2). Anything else i should be checking? I plan to remove valve covers and check injector oil spouts to see if all 8 are spewing oil out, ive got a new ICP sensor ready to go in, new fuel pump ready to go in.. Cold starts it smokes blue for the first mile or two after a 5-10 min idle warm up. Oils in the exhaust as well .... Help! Thanks. '95 F350 7.3
 
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Old Feb 2, 2020 | 08:48 AM
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Have you checked the wiring plugs to the valve covers, and the under cover harnesses for melting? It could be a wiring problem rather than an injector issue, as these injectors get an electrical signal when to fire. How many miles on your injectors?
 
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Old Feb 2, 2020 | 12:41 PM
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Originally Posted by farmert
Have you checked the wiring plugs to the valve covers, and the under cover harnesses for melting? It could be a wiring problem rather than an injector issue, as these injectors get an electrical signal when to fire. How many miles on your injectors?

I can only guess they're all the originals, 215k miles
 
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Old Feb 2, 2020 | 07:20 PM
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You can shim them to save some coin. Heres a kit I've used lots of times with great success.
https://www.ebay.com/itm/94-03-7-3L-...oAAOSwZuFdjt5p
 
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Old Feb 2, 2020 | 08:20 PM
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Originally Posted by z31freakify
You can shim them to save some coin. Heres a kit I've used lots of times with great success.
https://www.ebay.com/itm/94-03-7-3L-...oAAOSwZuFdjt5p
Man, that seller has a lot of shim and o-ring kits. Do they really do all he says? If so, that's pretty amazing.
 
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Old Feb 2, 2020 | 09:44 PM
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I haven't used his premium injector rebuild kit but have shimed many injectors and all have worked great.
 
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Old Feb 2, 2020 | 10:10 PM
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Originally Posted by z31freakify
I haven't used his premium injector rebuild kit but have shimed many injectors and all have worked great.
Thanks man, that’s great news!

EDIT - Just watched one of his videos, doesn’t actually look like too bad of a job. I think I might try this before replacing my injectors and put that money towards eFuel
 
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Old Feb 3, 2020 | 04:57 PM
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Could have a bent push rod or low compression on 1
Needs more investigating
 
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