my e99 7.3 does the same exact thing. changing my harness soon!!! been driving my truck like that for a couple years . I couldn't figure it out , even upgraded injectors and still did it . thanks for this video !!!!!
7.3l were great engines. I know they had CMPS problem with them not a big deal things go bad. They had a recall anyways. Also the problem with the injectors wasn't that they were junk like a lot of people said they were. It is a heui system which utilizes the systems engine oil to inject fuel. Well the two injectors (7 & 8) are last to get oil so they are known to get clogged which can be avoided by regular oil changes. Also the wires under the valve covers there are wires for it which get worn.
I feel for you on this one, he usually has better hands on stuff.? Watch ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-TDucCsMxmVU.html to the end, give it a chance. This is what Jaeger is talking about. Even though it's an older 7.3 it's the same problem, my 99.5 had this exact problem also, easy fix.
even when its not runnin right ,it still sounds better then a hybrid or ricer :P,you smoked the camera good !,thank god they sell wire harness repair kits some vehicles you got to replace the main harness !!!
p1316 is most likely your idm. the resisters and transitors are old and going out in the 7.3l idms. there is a shop in Illinois that fixes 7.3l idm boxes for about $120. also, there is a different shop in ohio, rosewood i think, that will correctly rebuild tour injectors. standard issues are cps, the oil temp sensor on the back of the hpop, under valve cover harness, 50 cent solution, google these issues. most likely idm rebuild needed or injector rebuild needed.
my dad's 03 f350 7.3 has 345k miles on it and #3 injector coil went bad took out the IDM with it. the mechanic tested the harness and said it wasn't it then he did a buzz test and noticed ##3 was down so he tested the resistance on it and it was low. we got a used injector and swapped the coil only plus a new IDM and problem solved drove it that day for 800 miles non stop. total cost 850 bucks.
I'm glad you made this video. Iv been chasing a rough idle and a miss kind of like what your truck is doing. I'm gonna check the harnes or valve cover gasket harnes. I hope it solves it. it pisses me off.
Robert McConlogue Jr besides a bad harness check the coils resistance on the injectors. I had a bad one and it caused really random shut downs first then months later it took out the IDM. mechanic found out it was the Injector coil found a used one from a friend and replaced just that plus a IDM and solved
my 99 is doing the same thing - can you replace the injector wiring only, or do you have to replace the whole harness? how much did this repair cost; did that fix your problem?
I got rough idle, white/black smoke when revving, and blow by is fine.. inline filter too bed tank started buzzing bad and buzzes long after key is turned. truck starts fine with good idle until you get down the road about 5 miles. I lose power & can only go 20, poor girl hardly made it home. Turbo is fine, I throw no codes besides when this starts happening because it makes trans lag so it throws ratio codes..that was debunked when she ran fine.. this started happening after I switched to my main tank that I haven't used in 8 months or filled in long time and after symptoms occured in a snap, I flipped back to bed tank.. I thought the truck was a goner, loss power, smoke, I checked bowl (was some debris) & cleaned new filter that was already brown, etc... the main tank smells like rotten eggs. I am draining today to see if it was just bad diesel. what do you think? injector? injector clog, orings?? poor fuel pressure? pump fail? truck always had hard time with the main tank but I didn't realize how low bed tank was this time. I filled bed tank up and dropped seafoam in her 2 days ago. If this is bad diesel when do you think it'll cycle through?
Does the wiring for the injectors use a color code? The harness plugging into the valve cover plug has 9 pins. The ground, center, and the outer 2 on each side are easy to account for. The 4, 2 each side of center are for the injectors and the colors are hard to identify. Looking for the colors on the passenger side.
I had a similar problem on my company work truck . I ohmed out out my Valve cover gasket, and injector harness it was good, I replaced it any way. So I then checked all the relays, and fuses which were good. I found that my injector diode was bad, and melted down, which must have caused a powersurge in the PCM. I replaced the diode located in the fuse box next to the A/C diode, and the PCM, and the problem was solved . Usually its the valve cover gasket though.
I'm looking into buying a truck like this. If I see these signs...like black smoke shooting out the back when I accelerate, or low power, or the engine slightly rocking...is that an indication not to buy?
I have the same symptoms. We just replaced all the injectors and glow plugs. When it runs fully, it runs mint. But then it changes like a light switch and runs in almost a limp mode. Hard to get it up to highway speed. Like down 3-4 cylinders. About 20K ago, we had replaced the valve cover gasket wire harness. We tried swapping IDM with another truck. I'm starting to think about the wire harness too. Can I buy one from Ford? Or is there another supplier? Or do I have to pull one from a wreck?
I am in the same boat right now. Just changed injectors as well, and these problems started. Have you figured it out yet? If so, what was it? I have my truck at a professional tech getting fixed right now. If you haven't figured it out, I would be happy to give you any info on it as soon as I get it figured out.
joshlujan25 I lost the truck for the winter. It sat outside buried in the snow at a powerstroke specialists place. When the snow cleared, I was about to get it towed out of his shop. He begged me to let him try. Oddly, he removed the valve cover on the passenger side where the cylinders were failing. He said he found a glow plug wire that seemed to be shorting. He moved the wire and said the truck started right up. Drove it for 3 days, no problems found. To be safe, I asked him to replace the under valve cover harness again with a new Ford one. So, in my case, it was not the hardware, it was an installation issue. The truck has been running mint now since March. And with the new injectors, my mileage and power is back up to like new levels at 214,000 miles. (2000 Excursion 7.3, Diablo Chip, intake, intercooler, Banks turbo back 4", 4" lift, 315/75/16 BFG K02)
joshlujan25 Indicators were pointing towards an IDM. But they borrowed one from another truck and that didn't solve it. The IDM harness goes up the driver side valve cover. That is bad spot for wire chaffing. Had already repaired 2 wires there. 1 we had to re-route around the plug because it was toast. But my guy ohmed out every wire in that harness while trouble shooting BEFORE we did the injectors. He was convinced it was the injectors because after swapping out the 3 the computer was saying were bad, it ran really well. So I had him do ALL the injectors. It worked great...Until it didn't. Then it cut in and out randomly. At one point, we thought the IDM had like a cracked board in it where it might be acting different depending on temp. But that wasn't it.
just replaced all my injector last week then this weekend did the exact same thing to my 2001 f250 300,000 mile the problem is the driver side is not firing due to burnt harness will cost me $950+ just for the parts plus overnight shipping of $100 then the labor last week the injector cost $4500 i love this truck but when things happened like this is hard. i thought the wire got lose from the valve cover but my truck choose to go the expensive route.
did you switch our your harness inside and outside the valve cover or just the valve cover gasket... dorman makes a kit that includes the gasket, connector, and harness but you have to cut the existing pig tail and wire it and thats just asking for problems... i would rather use factory electical connectors if i can... please let me know what you did
this is no joke exactly whats happening with my 6.0. keeps throwing injector 2 contribution when it warms up. runs fine when cold. buying a new harness soon.
You know, for the reputation the Power Stroke 7.3 is supposed to have as a reliable engine, it sure does seem like you have to put quite a bit of work into it. Now, I might could understand it if you guys did frequent, heavy towing with it (Do you?), but not for daily driving.
There are lots of people that get mad at people that have stuff they want, and alot are just far immature about it and that is the best they can come up with to feel better about themselves, the kind of video it is makes it obvious. Atleast the truck is an easy fix, maturity is another matter.
I have a 97 7.3 that kinda stalls around 2000rpm if I am in park and try to rev it up and if I'm in gear does it about 1500-1800rpm and chatters at 30-40mph at 60+ can't tell anything is wrong. And it has two plugs on each side valve cover can someone please tell me what goes where so I can do a ohm test. Thanks.
My 1995 also does it it gets to 40 and starts shaking and skipping but after you get to the higher rpms it stops It and it runs fine and some mechanics have told me is the wiring harnesses for the injectors the truck has 316k
Bank number one is not working at all the injectors are stone cold and it is not spitting any oil I have disconnected each injector on bank 1 plug them back to see if anything changes I make sure that the harness and the connector are nice and tight and that looks good I decided to swap out valve cover gaskets and harness from bank 1 too bank 2 problem continues so I swap solenoids From injector 1 to injector 2 and problem still there then finally I swapped out the injectors from 1 to 2 from 2 to 1 same thing. Bank one is not spitting any oil and injectors are cool . I check the wiring I don't see any cracks or melting wires I have not been able to check it with a multimeter yet but have I done enough to eliminate the injectors obviously being bad and the solenoid and the harness ?IDM ?
my 2004 want crank rite now, I have done just about everything to this truck an it still gives me problems . the wire harness is all there is left . started out just driving down road an hit a bump an dye like u cut off the key an now It just want crank at all not even with eithther
Are you just venting your problems to the world with this video about your 7.3? The video makes absolutely no sense as it does not show any verification that it was a faulty wiring harness. Wiring harness' almost never go bad. Your problem my friend appears to be a faulty IDM (Injector Driver Module). Also, if you know something isn't right, why go out and rev it? To see the smoke?
It’s a common problem on a 7.3 because the injector wiring harness is also the valve cover gasket and sees a lot of heat. You just don’t know what you’re talking about.
Yes but you need a scanner that will pick up the IDM codes, the cheap ones other than the car pro app won't pull em. You will get the codes with the buzz test on the app, I just made a video about it myself Im dealing with his issue.
it cant be fixed its got less then 150,000 miles an looks like its new a dam sham. I need it fixed an not just say n its fixed I only have about 80,000 invested so far
