1996 7.3 injector issues??
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Cross-Country
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1996 7.3 injector issues??
I have a 1996 f350 with the 7.3 and about 210,000 miles. I’ve had it for several years and it has always had a slight surging at low rpm’s. I generally turn overdrive off in town to avoid the issue. It runs great at highway speeds. Lately it has gotten worse and the colder weather makes it hesitate pretty harshly now. The truck is stock other than it’s straight piped and has a 6-position chip that I installed. My fuel mileage has dropped as well. I’ve replaced the cam sensor. Installed new glow plugs and harnesses a year or so ago due to hard starting in cold weather. It has fresh fuel filter and I change the oil regularly with rotella 15-40. I’m thinking it’s time for new injectors. I’ve seen tons of recommendations on larger injectors, but I’m not sure if I should go that route or not. The truck is a tow pig. I don’t drive it all that often, but I don’t let it set for more than a week or so without driving it at least some. I’m not looking to make a ton of power, but some added towing performance would be nice. What advice would y’all give?
Former Vendor
Joined: Sep 2020
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From: Florence, MT
Stock split shots (140cc) with custom tuning (stock split shots with 30% nozzles) and custom tuning or single shot 160/0 - 160/30's all sound like they would work well for you. It just depends on your goals.
Hotshot
Joined: Aug 2006
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I have a 1996 f350 with the 7.3 and about 210,000 miles. I’ve had it for several years and it has always had a slight surging at low rpm’s. I generally turn overdrive off in town to avoid the issue. It runs great at highway speeds. Lately it has gotten worse and the colder weather makes it hesitate pretty harshly now. The truck is stock other than it’s straight piped and has a 6-position chip that I installed. My fuel mileage has dropped as well. I’ve replaced the cam sensor. Installed new glow plugs and harnesses a year or so ago due to hard starting in cold weather. It has fresh fuel filter and I change the oil regularly with rotella 15-40. I’m thinking it’s time for new injectors. I’ve seen tons of recommendations on larger injectors, but I’m not sure if I should go that route or not. The truck is a tow pig. I don’t drive it all that often, but I don’t let it set for more than a week or so without driving it at least some. I’m not looking to make a ton of power, but some added towing performance would be nice. What advice would y’all give?
If you can get it on a scanner having data will help .
First , if you had a FP problem , it would show up at higher RPMs rather than Idle .
Second , Bigger injectors are a good upgrade for more power . If you still have a mechanical fuel pump ,it is obviously still working , the return screen blocked usually causes the bowl lid to blow off , so disregard that for now . (Its easy to check) .
Third ,Starting times depend on a few things . EOT first , ICP next , how the IPR responds next based on what the PCM sees from the ICP . The ICP is an easy swap , may make all the difference , "if" the EOT sensor is reporting the correct oil temp .
Fourth , The FPR regulates fuel returning to the tank making sure the bowl is always full . Each injector can only hold enough fuel to fill the chamber , no matter what the pressure is going in . When it falls on its face under hard accel look at the fuel system then .
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