Injectors???
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Injectors???
I have a 99.5 7.3 and when I start it, it white smokes. I'm pretty sure I'm getting fuel in my oil and the number 3 and 8 cylinder are failing the contribution test with codes p0629 p0284 I'm leaning towards buying 2 new injectors for 3 and 8. Any suggestions??
Lead Driver
Joined: Jun 2013
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From: north of Minneapolis, MN
Others will chime in, but #3 and #8 failing the CCT test isn't uncommon depending on which CPS you are running.
I'd recommend that you troubleshoot the glowplug system before doing anything drastic like replacing injectors.
I'd recommend that you troubleshoot the glowplug system before doing anything drastic like replacing injectors.
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i've already tested the glow plug system. The plugs are only a few months old and the relay is about a year old and works. I just recently picked up a grey borg warner cps from o'reilly's because mine seemed to be leaking. I put the new one in and my truck started missing. So I put the old one back in and it ran good as ever.
Lead Driver
Joined: Jun 2007
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From: Hampton, Maryland.
(Cringing while asking this question) What brand of GP's did you use?
You are getting white smoke at start up, but it is still starting, so that is good. Does it run rough, and how much/how long does it smoke?
You are getting white smoke at start up, but it is still starting, so that is good. Does it run rough, and how much/how long does it smoke?
Hotshot
Joined: Jan 2011
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From: Puget Sound
Replacing the O-rings sometimes gets the job done. It's a lot of work, but it's an inexpensive task to try before you take it to the next level. This is also a chance to check the injector torque and the condition of the UVCHs.
3 and 8 almost always fail with a grey CPS, so don't put a lot of stock in that one test result. A new CPS from Riffraff Diesel (and the O-rings) may solve all your woes, for less than the price of a single remanufactured injector.
3 and 8 almost always fail with a grey CPS, so don't put a lot of stock in that one test result. A new CPS from Riffraff Diesel (and the O-rings) may solve all your woes, for less than the price of a single remanufactured injector.
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I put motorcraft glow plugs in. Already had the autolite breaking off issue in my grandpas 7.3.
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Hotshot
Joined: Jan 2011
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From: Puget Sound
Absolutely... as will loose injector torque. The high-pressure oil will blow past worn or loose O-rings and feed back into the fuel rail.
I'm not saying you won't have to go back in there and replace the injectors at a later time, but the injectors themselves aren't likely to leak oil into the fuel. This whole job is very inexpensive and it will show an improvement anywhere from minimal to a complete fix. HKusp has a lot of experience with this... as do I.
Double-check your GPR - make sure the contacts are not pitted: Put a voltage meter across the two big post on the GPR and turn the key. You should have zero volts across the two posts when GPR is activated.
I'm not saying you won't have to go back in there and replace the injectors at a later time, but the injectors themselves aren't likely to leak oil into the fuel. This whole job is very inexpensive and it will show an improvement anywhere from minimal to a complete fix. HKusp has a lot of experience with this... as do I.
Double-check your GPR - make sure the contacts are not pitted: Put a voltage meter across the two big post on the GPR and turn the key. You should have zero volts across the two posts when GPR is activated.
Hotshot
Joined: Jan 2011
Posts: 18,849
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From: Puget Sound
Oops... I missed that - too many oil-in-fuel posts. Sorry 
Fuel in oil? The only oil that gets to the injectors is between 10 and 60 times the pressure of the fuel - unless it's when you first turn on the key before cranking. If this were the case, you would have plenty of oil in your fuel as well. What does your fuel filter look like?
Not even a blown head gasket would put fuel in oil - the two are so separated. You can take the heads off the engine (complete with injectors and glow plugs), and they will hold fuel pressure and Injector Control Pressure. The only time the two get close is via the injectors and their O-rings, and that's the High Pressure Oil from the HPOP.
Fuel in oil? The only oil that gets to the injectors is between 10 and 60 times the pressure of the fuel - unless it's when you first turn on the key before cranking. If this were the case, you would have plenty of oil in your fuel as well. What does your fuel filter look like?
Not even a blown head gasket would put fuel in oil - the two are so separated. You can take the heads off the engine (complete with injectors and glow plugs), and they will hold fuel pressure and Injector Control Pressure. The only time the two get close is via the injectors and their O-rings, and that's the High Pressure Oil from the HPOP.