99 7.3 injector problem - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 02-22-2011, 09:23 AM Thread Starter
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99 7.3 injector problem

Hello. Ok I have a 99 f350 it’s got about 160,000 on it. The problem started about 2 years ago now. A friend had borrowed the truck one night then I get a call saying it broke down its blowing white smoke and has a loud knock in the engine. It turned out to be a bad injector one of the injectors was over fueling so I put a new injector in. about two weeks latter I was driving and same thing happened another injector failed the same way. so I replaced that one and about two weeks after I replaced that one another one went this time the injector tip broke off and fell into the motor lucky only damaging the piston. so I pulled the motor with a friend and replaced the piston and put 8 new injectors in the truck ran great for about 6 months then started to idle rough not really to noticeable but enough for me to tell. Brought it to my friends shop and did a buzz test and every thing else and came up with pcm-idm communication error I think it was code 1668. well being stupid I drove it for a little longer planning on bringing it to the ford dealer but just putting it off as the truck was only having a slight rough idle. Well yep another injector went and this was one of the 8 that I had replaced so I replaced it and brought to the ford dealer last month and they told me they could not get any codes from the truck because I had the batteries disconnected for about 3 or 4 weeks before it got there. They told me to drive for a day or two and come back. Well I only mad it about 8 miles from the dealer and another injector failed. I have pulled the idm out and opened it up to see if it had water damage and it looks fine also this truck has had 3 idm’s replaced in it over the years. I’m thinking it’s an electrical problem and has been looking into purchasing a breakout box to start trouble shouting any suggestions or help with this problem would be great thank you Kyle…
Also here is a video of my truck I took last month when it broke again. This is the same way it has failed every time
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post #2 of 4 Old 02-22-2011, 07:22 PM
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do you use Fuel Additives?

1999 Ford F350 Super Duty. Banks Power Stinger Plus System. Custom Automatic Transmission with Suncoast Converter, TransGo Tugger Kit, Alto Clutch Packs, Mag-Hytech Pan. 456 gear Ratio. ARB Deluxe Winch Bull Bar Bumper. AirLift Air Bags. 1inch Lift Kit. ProComp Series 7089 Cast Blast Wheels. ProComp 37X12.50R17 Mud Terrain Tires and ProComp 35X12.50R17 All Terrain Tires.

300,000 and still Strokin.
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post #3 of 4 Old 02-22-2011, 07:28 PM
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thats painful to watch..... it is weird that you have had so many injector failures.

hello, my name is gary
new: 2008 f250 lariat 4x4 ccsb 6.4.....
sold,2011 f250 xlt 4x4 crewcab 6.2 shortbox 5 star tuned
sold,early, 09/98, 1999 f350 lariat 4x4 crewcab 7.3 dually
sold, 1990 f350 lariat 4x4 crewcab 7.3 longbox.
sold, 2003 f350 lariat 4x4 crewcab 6.0 longbox.
1987 we4 turbo buick
2008 taurus limited
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post #4 of 4 Old 02-24-2011, 04:09 AM Thread Starter
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I did use fuel additives after i replaced all the injectors. (power service product BIO KLEEN because the truck had sat for so long and a fuel system lubricant, i dont remember the product name).
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