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I just replaced all 8 injectors hoping to solve this. She didn't start missing until I pulled the old injectors one day to replace the washers on them that were leaking, so there's a good chance the injection pump isn't the problem. When I replaced the injectors last night, a couple of cylinders did start firing again. She's got a strong ticking sound, valves maybe, but I cant isolate it. Oh, and I drive it around 600 miles home missing cylinders because I changed the washers as a last resort on a road trip trying to stop leaking (which it did). Tia,
Probably an injection pump. I'm guessing it may cause intermittent problems. Usually the truck just stops running at all at some point but, i'm sure this is possible too. Did you get re manufactured injectors?
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Tanner - Connecticut Chapter Member.
1983 F-250HD 2wd 300. T18 4speed 4.10s. Base. 170k Hiding in garage for the last 10 years. dead. dads truck. Project truck.
1991 F-250HD 4x4 351w ZF 5speed 4.10s Custom. 165k old plow and landscaping truck. Parts truck.
1990 F-250HD 2wd 7.3idi e4od 3.55s. Custom 346k 'The Carpathia' Daily driver.
Just because you replaced all the injectors doesn't mean all the new injectors are good. QC on a lot of injector brands is more than lacking. I am speaking from experience.
If your engine is actually not firing on a cylinder or two, you will feel it shake/vibrate in the cab; especially when reversing.
To find a bad injector you can do one of these common methods: loosen the injector line at the top of the injector and see if the engine runs worse or stays the same, use the glow plug method. To use the glow plug method, you need 8 known good GPs installed in the truck, start the truck, remove GP wires from individual GPs, and let the truck continue running to operating temp. Once at op temp, use a multi-meter set for millivolts, attach the negative lead to a clean engine ground and measure the millivolts from each glow plug's electrical connector (the lead on the plug itself). You should get a fairly consistent reading from each GP and any cylinder with a 10% or more difference is likely your problem cylinder.
You should replace the injector pump when you install new injectors if it is old. It may be contributing to the problem you are having now but the truth is it won't last too much longer if it is as old as the old injectors.
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1991 F250 7.3 IDI, Supercab, 2WD, 10.25 Sterling with 3.55s, E4OD, Hydroboost, rebuilt Banks Sidewinder.
1983 300SD - Needs lots of love. UMO test vehicle.
"I gave y'all a couple 'a good ol' revs of the straight pipe, so if y'all got any b!+ch'n 'er complainin', go ahead and keep it to yourself." -- Me
Brand new GP Sorenson injectors. I had no problems with it at all till I touched the injectors the first time, ran strong on all 8 cylinders, just with leakage. I put in new washers, boom, missing cylinders. When I put inn the new ones last night, I did get maybe two of them firing again.
Any of the fuel lines, not the. I don't think she's missing any more, but she still panty producing power like she should. She's still rocking a lot as well. Busted motor mount? Could also be a timing issue, I suppose.
Brand new GP Sorenson injectors. I had no problems with it at all till I touched the injectors the first time, ran strong on all 8 cylinders, just with leakage. I put in new washers, boom, missing cylinders. When I put inn the new ones last night, I did get maybe two of them firing again.
sounds like you were not careful enough about cleanliness.
pour in a good dose of injector cleaner and go for a an hour drive or so.hopefully she'll clear right up.
of course if it's so bad that she wont even run,you may need to pull the injectors and clean them.
id probably fill the filter with ATF and pour in a couple quarts in the tank too.but with it looking like red dye,be careful.
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'93 BRG/BLK F250HD XLT 4x4 1st Gen Navistar 444ci Diesel w/ Intercooled 2nd Gen Banks Sidewinder Turbo, Built E40D, Hydroboost Brakes, Dually, Dump, & Plow
Put in a goodly amount of Lucas oil injector cleaner (comments?) And been driving about am hour and a half. She's a bit better, but still horribly rough at idle. If this starts looking like a massive parts replacement spree, I might just buy a 7.3 powerstroke to drop in, and sell/give this engine to someone with more time to invest.
GP sorensen does not have brand new injectors, they are rebuilds and they are your problem.
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91 f 350 cc 4x4, 3:55 gears. zf 5, 7.3 ATS 093 with bigger comp wheel, intercooled with cutdown 7,3 ps IC all gauges ignored with good aftermarket ones. Head studs, balanced . 12 psi 1k pyro under load way better mileage than the 460.
218/461 on the dyno. after 80k miles, wanted to make sure she was broke in. sandeater1@gmail.com
Are you sure? These were marketed as being brand new, and nowhere does it say they are remans.
Thats good if they are new,I have never seen new, they must be reboxed.
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91 f 350 cc 4x4, 3:55 gears. zf 5, 7.3 ATS 093 with bigger comp wheel, intercooled with cutdown 7,3 ps IC all gauges ignored with good aftermarket ones. Head studs, balanced . 12 psi 1k pyro under load way better mileage than the 460.
218/461 on the dyno. after 80k miles, wanted to make sure she was broke in. sandeater1@gmail.com
"I had no problems with it at all till I touched the injectors the first time, ran strong on all 8 cylinders, just with leakage. I put in new washers, boom, missing cylinders."
this is why im thinking not making sure things were clean while installing 'em the second time around is likely the issue.
the first line of that should read "until i touched the injectors the second time" though.if im understanding correctly.
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'93 BRG/BLK F250HD XLT 4x4 1st Gen Navistar 444ci Diesel w/ Intercooled 2nd Gen Banks Sidewinder Turbo, Built E40D, Hydroboost Brakes, Dually, Dump, & Plow
No, I pulled out the original CAV England injectors to replace the washers, put them back, lost the cylinders. Replaced them with the gp sorensons, got the cylinders back, but she's still idling rougher than all get out, and not putting out as much power as before the first time I pulled the injectors. I've run like half a gallon of injector cleaner through her so fat today, so I doubt its them. I'm getting fuel to all cylinders, tested by loosening the lines from the IP.
oh oh.well in that case,im with Russ.you got bad injectors obviously.
the originals were working fine though,then all the sudden failing when you replaced the washers still leads to you getting junk where it shouldn't have been the first time though.if you made sure to keep everything clean when installing the new set,then it sounds like those are no good.kind of a bad does of Murphy's law lol.
it's either that,or the new injectors are working fine,but the old ip just doesn't have the nuts it used too, to properly pop the fresh 8??
since Russ knows his injectors,and he says they're not worth a lick,then id listen and start there.
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'93 BRG/BLK F250HD XLT 4x4 1st Gen Navistar 444ci Diesel w/ Intercooled 2nd Gen Banks Sidewinder Turbo, Built E40D, Hydroboost Brakes, Dually, Dump, & Plow
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