Split Shot Swap for Single
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Split Shot Swap for Single
Ok, I have a 1999 (late) F-350 Dually, 4x4, Auto, 257K miles, 4" turbo back muffler delete exhaust, all else stock. I thought the truck felt flat when accelerating. A mechanic friend of mine just happen to borrow the truck to get parts. He came back and told me something wasn't right. He said felt like it was down on at least 2 cyl. Performed a buzz test and all eight passed. He told me to start looking for new injectors. I have read so much on the injectors here that now I am wondering the possibilities of what is wrong with mine. Oil leak reducing pressure in split shot injector? Something else? No check engine light. I can get my hands on single shot injectors. Is this a direct swap with out and program changes? Any help would be appreciated. Thanks
Postmaster
Joined: Dec 2010
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From: Gary,Indiana
First of all Welcome to FTE 
Before you go out and buy new injectors I would check to see if you can pull any codes that might be stored in the pcm. And without all the facts I would start by retorqueing the injector hold down bolts. And find out what kind of pressure your HPOP is putting out. And you switch to single shot you are going to need custom tunes.
Before you go out and buy new injectors I would check to see if you can pull any codes that might be stored in the pcm. And without all the facts I would start by retorqueing the injector hold down bolts. And find out what kind of pressure your HPOP is putting out. And you switch to single shot you are going to need custom tunes.
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Thanks, I will see if there are any codes tomorrow. I was a little confused when we did the buzz test and all the injectors sounded pretty good, at least compared to each other. I guess thinking if one or more were sticking that it would sound different. As far as swapping out to singles, I can get my hands on several versions and that is the only reason I was tossing that around.
Codes tomorrow and then I will reply again. Also, just FYI, factory oil pressure gauge in dash reads as if it has great oil pressure. I haven't put a gauge on it to know for sure. Also I will get brand of tester that we pull codes with to know if it is possible to get live readings. Thanks again.
Codes tomorrow and then I will reply again. Also, just FYI, factory oil pressure gauge in dash reads as if it has great oil pressure. I haven't put a gauge on it to know for sure. Also I will get brand of tester that we pull codes with to know if it is possible to get live readings. Thanks again.
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Joined: May 2001
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From: Cabot, Arkansas
Welcome to FTE!
The injectors themselves are a direct swap, but you will need programming changes.
Also if you swap stock for stock, you'll lose about 40cc of fuel. Wouldn't really help diagnosing a low power problem.
Originally Posted by Swupe1
Is this a direct swap with out and program changes?
Also if you swap stock for stock, you'll lose about 40cc of fuel. Wouldn't really help diagnosing a low power problem.
Lead Driver
Joined: Sep 2005
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From: Norco,CA
You don't want early shock injectors. They won't run right and need tuning changes. Also they are smaller then what you have. Now after market or ac single shots are a different thing. They are bigger, they do need tuning and you will probably get better mpg. Your HPOP is high pressure oil, and the gauge on the dash doesn't show that. You'll need a different gauge or AE for that. Unplug your icp and see if that helps at all. Could be fuel pressure or blockage as well.
Chet
Chet
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Ok, unplugged ICP, seat of the pants does feel better, but it could just be me. I let the truck warm up, it was about 40 degrees this morning. Of course this triggered check engine light. Did a couple WOT's and felt better. Did not see any excessive smoke or smoke at all for that matter. Could it just be that it fed more fuel to the good one's? I have not had time to run to buddies with scan tool. Not been able to check for "old" codes or use scanner for live information.
Thanks to all that is helping. This is a great forum. A lot of questions being answered. By the way, I am not a beginner mechanic. I have been working on and restoring Ford's for a long time. This is just my first diesel. Love this truck!!
Thanks to all that is helping. This is a great forum. A lot of questions being answered. By the way, I am not a beginner mechanic. I have been working on and restoring Ford's for a long time. This is just my first diesel. Love this truck!!
Lead Driver
Joined: Sep 2005
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From: Norco,CA
Okay, you really need the codes. It would be good to get thte duty cycle and hpop pressures read also. Did the icp have oil in it? Look at the plug connection. Fuel pressure under load or wot would be nice to know also. Remember obs II readers don't read all are codes.
Chet
Chet
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still plays with trucks
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From: Twin Falls Idaho
first off welcome to the 7.3 side of FTE. We call ourselves "the Brotherhood" we all strive to work together, and no question is a stupid question. We're glad you're here.
Now back to your questions
Single shots Inj are a bolt in swap BUT it will require custom tuning for your PCM. any custom tuner can do this. Superchip and other canned tune/code readers cannot.
something I would look at, like Chet, said is fuel pressure. you should see 55-65 PSI at idle AND wide open throttle. You will have to plumb a pressure guage into either the fuel filter housing or into the ports at the ends of the heads. look here for adapters for fuel pressure guages :Replacement O-rings for Ford Diesel Engines
restrictions in the fuel system can cause that sluggish feeling and make your inj sound like ****.
keep talking and we'll keep helping
Barney
Now back to your questions
Single shots Inj are a bolt in swap BUT it will require custom tuning for your PCM. any custom tuner can do this. Superchip and other canned tune/code readers cannot.
something I would look at, like Chet, said is fuel pressure. you should see 55-65 PSI at idle AND wide open throttle. You will have to plumb a pressure guage into either the fuel filter housing or into the ports at the ends of the heads. look here for adapters for fuel pressure guages :Replacement O-rings for Ford Diesel Engines
restrictions in the fuel system can cause that sluggish feeling and make your inj sound like ****.
keep talking and we'll keep helping
Barney
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Hey guys, long day yesterday. I have a 2003 GT, 73 Merc. and a 72 "highboy" 4x4 for sale. Trying to trim the fleet. lol!! Great weather here, had to focus on them.
Ok, I checked when I was plugging the ICP back up and yes, the plug did have oil in the connection area. I cleaned it up and connected the ICP back up. After a little bit, the check engine light went back out. Could not get my hands on the scan tool to get any codes or data.
I work a lot during the week and it may be difficult to get much done until Friday so if I don't post or reply, I will as soon as I have info. I appreciate all the help and info. Again, this forum is great and I love this truck. Thanks to all.
Ok, I checked when I was plugging the ICP back up and yes, the plug did have oil in the connection area. I cleaned it up and connected the ICP back up. After a little bit, the check engine light went back out. Could not get my hands on the scan tool to get any codes or data.
I work a lot during the week and it may be difficult to get much done until Friday so if I don't post or reply, I will as soon as I have info. I appreciate all the help and info. Again, this forum is great and I love this truck. Thanks to all.
Post Fiend
Joined: Nov 2007
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From: Payson, AZ
[quote=Swupe1;11658446]
Ok, I checked when I was plugging the ICP back up and yes, the plug did have oil in the connection area. I cleaned it up and connected the ICP back up. After a little bit, the check engine light went back out. Could not get my hands on the scan tool to get any codes or data.
quote]
Oil in the ICP connector means the ICP sensor is going bad. The fact it seems to run better when disconnected goes to provng that. Get a new ICP sensor installed before you begin to suspect bad injectors.
Injector buzz tests only the electrical side of the injectors by energzing the solenoids to open the poppet valves. Buzz test does not reveal any hydraulic problems the injectors might have.
Ok, I checked when I was plugging the ICP back up and yes, the plug did have oil in the connection area. I cleaned it up and connected the ICP back up. After a little bit, the check engine light went back out. Could not get my hands on the scan tool to get any codes or data.
quote]
Oil in the ICP connector means the ICP sensor is going bad. The fact it seems to run better when disconnected goes to provng that. Get a new ICP sensor installed before you begin to suspect bad injectors.
Injector buzz tests only the electrical side of the injectors by energzing the solenoids to open the poppet valves. Buzz test does not reveal any hydraulic problems the injectors might have.
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