bad injector time for a full set? - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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post #1 of 10 Old 04-13-2014, 04:40 PM Thread Starter
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bad injector time for a full set?

hey guys hows i going i have an 08 f350 with 139k miles and i have a missing injector i believe when it gets below like 40 out the ****er just dumps white smoke when you turn it on once you get into drive and start driving though it stops almost immediately and i dont really have any noticeable loss of power no check engine lights but something is definitely not right the it idles very rough and you can feel the entire truck seem to chug when sitting at an idle
so my question to all of you is what do you think this could be? in my mind it is definitely an injector problem and if it turns out to be an injector what should i do to fix the situation? i wanted to get a new set of injectors that are just slightly more powerful im not looking for anything crazy but a little bit more power definitely isnt a bad thing in my eyes but im not looking to get crazy and upgrade all kinds of parts to support the injectors im just looking for injectors i can run with my stock system
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post #2 of 10 Old 04-13-2014, 05:05 PM
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Sounds like an injector....You need to get it checked and verified ASAP, you don't want to melt a piston if that thing sticks open.

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post #3 of 10 Old 04-13-2014, 05:06 PM Thread Starter
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trust me i plan to but i want to know about aftermarket injectors that i can run on a stock system just so i can get a little bit more power out of the thing
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post #4 of 10 Old 04-13-2014, 08:29 PM
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Not sure if your deleted or not but personally I would just throw stockers back in. If your looking for a bit extra HP throw in a SCT h&s or spartan.

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post #5 of 10 Old 04-14-2014, 04:13 AM
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Originally Posted by srjd View Post
Not sure if your deleted or not but personally I would just throw stockers back in. If your looking for a bit extra HP throw in a SCT h&s or spartan.
Ditto ^^^ The 6.4 runs great on stock fuel. Unless you are looking to go to the 650HP+ club, I wouldn't even bother with after market, I would stay with stock sticks.

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post #6 of 10 Old 04-14-2014, 06:26 AM
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^^ What they said! Besides even if you get a little bigger injector you probably wont maintain rail pressure without dual fuelers or pulling PW.

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post #7 of 10 Old 04-14-2014, 06:32 AM
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Originally Posted by 04hdfatboy View Post
^^ What they said! Besides even if you get a little bigger injector you probably wont maintain rail pressure without dual fuelers or pulling PW.
For sure....unless you mod your pump, you will empty your rails before you see any power increase. Stay with stock fuel unless you plan on going big. The 6.4 is a beast, because it throws much more fuel stock than all others. Just tune, delete and enjoy.

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post #8 of 10 Old 04-14-2014, 08:48 AM
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Originally Posted by turbo kidd View Post
Ditto ^^^ The 6.4 runs great on stock fuel. Unless you are looking to go to the 650HP+ club, I wouldn't even bother with after market, I would stay with stock sticks.
With the right turbos, you can make 650+ and never touch the fuel system.
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post #9 of 10 Old 04-15-2014, 05:20 PM
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I am not aware of any modified injectors available for the 6.4 and it sounds like you need new injectors. There are obviously a lot of different nozzles and as everyone said, if you go with a bigger nozzle, you will have to do something with the fuel system or PW if you want to maintain RP. Personally, I still believe there are some benefits to a slightly larger nozzle with an otherwise stock fuel system. Specifically, a modest increase in size (15%) will spool up quicker (that has been proven), will cruise at LOWER EGTs (that is proven), and maybe with the right tuning (that is KEY), a slight increase in HP (this has not been proven). I admit JD's testing did show a loss of top end HP with bigger nozzles, but I still believe that with the correct timing and PW you may gain a little. Eric at Innovative also claims there are some gains to be had with proper tuning. In any case, this is why I am going to try 15% nozzles with a stock HPFP IF I can ever get my truck running again!!! Since you will already be replacing the injectors, my vote is try a 6 hole 15% nozzle if you HPFP is still strong and you don't mind getting custom tuning.

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post #10 of 10 Old 04-21-2014, 03:38 PM
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Hey just clarify. If your truck isnt deleted(stock) then the white smoke and the rough idle sometimes is the truck regenerating( doing an exhaust cleaning) I would keep an eye on the dash it will tell you when its cleaning. Also when you notice this happening open the window or get out you will smell 2 things, a burning rubber smell and a really strong diesel smell. If you smell this your truck is regenerating. I would do this before spend thousands of dollars on injectors. Just my opinion.
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