I think im having injector problems as of late and im thinking about replacing them but i was wondering how hard of an install this is going to be for me. I have a complete manual for the motor so i would think i could follow that enough. I put in some cleaner today and im gona see how well it works. But it started off small with just a small hesitation at about 2700-3000 rpm cruising on the highway going about 75-80 or so. Just did it every once in a while almost like a pattern. Then lately it got worse and started doing it just taking off or at lower rpm. its like a power loss and kinda kicks back to normal for a sec then back to running like its losing a cylinder. it got bad enough for me to finally need to start figuring it out. I'm just thinking its injectors since i have one new coil and the other was good, new wires and plugs. If anyone else has some input on what it might be or how difficult injectors are to do that would be great. as i have never done injectors on a car yet
3M sells an injector cleaner kit, for about 20 bucks, that hooks up to either the injectors directly or the fuel rail, and blasts them clear, I believe while the engine is running. I've never tried it before but we've had good success with it at work.
I'm about to do my head gaskets, and pull my injectors to replace the fuel rail and O-rings (suggested if they are old or in question), from all of my manuals it doesn't seem 2 be to bad to pull the injectors, i'll let u know u 2 weeks.
Also i've never found a way to clean injectors when they are off of a vehicle??
I dont know what year 5.0 you are running but when I had to replace the injectors on my 88 Mark VII ( has 5.0HO ) it was a brees. You just have to pull the intake plenum. Its a very easy job. I had one that was leaking but still didnt have any running problems just a gas smell. Good luck
They are not that bad. Time consuming mostly. IIRC you have an Explorer motor, right? Are you getting a lean code in either bank? What is your fuel pressure running? I'd be more inclined to think it might be a fuel pump problem rather than injector(s.) Just my $.02
It was throwing a lean code. i was told by my mechanic yesterday. i didnt ask him which bank or banks it was. I havnt done a pressure test yet, but now that you mention it i might have to check out the pump or the pressure regulator. My explorer pressure regulator i had to swap in might be bad. I put in some gumout full fuel system cleaner yesterday and so far it made slight improvement but that could just be cause its burning better with the **** in there and as soon as i use regular gas i could be back to the same problems. But of course now that i may need to do a pump or pressure regulator i have a full tank :(
im going over to the shop after work today and we are gona check out the pressure and see if the pump or regulator needs a fixn
2002 Ranger LT4x4 TheWifey
2000 F-250 7.3L Black N' Dirty
1986 Bronco II Tex'
Last edited by INT3RC3PTOR; 02-07-2008 at 11:37 AM.
I forgot earlier, when you pull them out, make sure you get the o ring. My engine was out of the truck and I was replacing them with 30#ers so I just hap hazardly yanked the fuel rail off and didn't pay any attention. When I went to put the fuel rail back on, one injector was giving me fits. I spent 20 minutes trying to figure out why the thing wouldn't go back on the #6 plug right. Come to find out I had an O ring from the old injectors stuck up in there still. Live and learn.
well i found out its the right bank(driverside) that had thrown the code. That side is also the side i didnt replace the coil on. So is it maybe by chance the other coil going out as well? if so thatd be a simple fix. I still kinda seems like a fuel problem. Could be my pump or regulator going out maybe?
well i found out its the right bank(driverside) that had thrown the code. That side is also the side i didnt replace the coil on. So is it maybe by chance the other coil going out as well?
Each coil pack serves 2 cylinders on one bank and 2 on the other. So, if you have a problem on one bank only, it probably isn't the CP.
If it comes to it, injector replacement should be easy once the upper is out of the way. They are just trapped between the lower intake manifold and the fuel rails. A word of caution: the electrical connectors for the injectors become brittle over time and it is very easy to break the retention clips when removing them. If this happens, you would need a complete replacement engine harness or a set of Motorcraft repair connector kits. Either option is expensive.
My engine came from the yard without a harness. The used harness I bought for it had been removed by someone else and most of the clips were already broken. I was talking to a dealer tech about it and he said they break all the time on older engines. Luckily I found a friend of a friend who had some extra connector shells that he donated to my project. The Motorcraft repair connector kits for the injectors are around $35 ... EACH! The price of a new engine harness would have been even higher - more than I paid for my used engine and transmission combined.
I have this saved as a favorite, they have aftermarket EFI injector pigtails for $6 each. They are the best place I've found for ford connectors. If you modify fords on any sort of regularity it's real helpful. http://rjminjectiontech.com/index.php?s=o2
So i put in another new coild on the right side to see if my luck its was that easy. But It seems so far (only driven it around the block and a few take offs) like its stopped the hessitation off and on etc and staying on for a while. but it almost seems like it has a little power loss all around. not taking off like it used to etc. I will see if it pulls the usual rough run like its been doing when i drive to my buddys place a few miles away. At this point it def. seems like a fuel problem and not spark
Hooked the truck up to my buddys snap-on scanner and found out about alot of whats going on. Its not injectors, not a fuel pump or regulator problem. But the passenger side bank was the lean one and the right was perfect. The lean side was dumping tons of fuel to make up for whatever was making it run so lean. the 02 sensors were working good, but one was showing weird numbers. then it got me thinking, i have had an exhaust leak at the pass. exhaust man. where it meats the exhaust. the donut is leaking enough to blow out and possibly suck in enough air to throw off how much air the motor is thinking it has. So tomarrow im taking the joint apart and replacing the bushing with a thicker one or just a new one. Hopefully its just this dumb problem that i can fix and be all good.