Keep in mind that the DIY Kits are designed for injectors that are in good shape to begin with. If yours are worn and need machining, instructions are in the DIY Kit, but that will complicate your build quite a bit. There are also some simple instructions to help you determine how much your injectors are worn on the DIY-Injectors.com website under the Kits section. This may help you decide if it's worth it for you to try them, DIY, or if you should send them in for the work to be done.
Also, the older AA injectors are very prone to wear and your P&B's will most likely need to be replaced. And if you have higher mileage injectors (as most of the older trucks are) you should consider new nozzles as well. A set of new nozzles makes for a well balanced, good running motor.
I'm not trying to talk anyone out of a DIY Kit, but most often times, the older AA's need a lot of work, and you shouldn't think that you can spend $250 and have a 'new' set of Stage-1 injectors when your'e done.
i gave myself a whole day to do them but it didn't take that long, i do recommend getting the premachined intensifier pistons, it saves a step and then you can do them one at a time.
the first one takes the most time, but the third and fourth one you can do them in about 15 min each.
Since I know nothing about injectors. I decided to just buy a set of stage 1's from Jim and send mine back as a core. I didn't want to take the chance of screwing my injectors up and having to spend more money. It's a little more up front but you'll get a better set of injectors. I've had my Rosewood stage 1's for 2 1/2 years with no problems.
no problem doing this job. first injector took long time the rest 20min maybe each.. not hard. watch out for tiny parts than can disapear.. i used 1 hour to find a tiny part that fell on the floor...
and buy the premachined intensifier pistons so you dont hvae to do that if you are in a hurry and nead the truck the same day.
i did this in my e350 and the power is great now i want stage 2...
Maintenance is everything...
If oil changes were prolonged or neglected you will need to do machining to correct tolerances.
If fuel filter changes were prolonged or neglected, you will have bad Plunger & Barrels.
No way to know on any of this until they are inspected.
I have seen 100k mile injectors need machining, and I have had 40k, 66k, and 80k mile injectors this summer all have bad Plunger & Barrels. I'm seriously begining to suspect that ULSD fuel we run is tearing these things up.
I have not seen an AA injector here since February that had a good P&B...
And that's quite a few. I have replaced more this year than the last 3 years combined.
where can I get new plunger and barrels at to swap while I'm doin injectors?
i pulled my old fuel filter out a few days after I bought the truck, and it was black as night. I put a new one in, and changed the oil. I take really really good care of my stuff, but the previous owner.....I guess not so much
i have done about 5 sets of the DIY injectors. like jim said the DIY kit will not fix a bad injector. if you have some mechanical skills and are good at working on things then you should be able to do the DIY kit. It has the instructions and pictures with it... as long as you follow the instructions there is nothing to mess up. first set took me about 8 hours to do (from shutting the truck down to starting it back up) now i can have everything done in about 3 hours from start to finish.
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