Replacing fuel injectors, Can I do anything else?

Going to upgrade my fuel injectors this weekend and while I'm in the engine, is there anything else I can do while there? Also, I've seen some things about replacing fuel filters as well, should I do that as well?
3.4L v6

 

I'm assuming fuel filters = injectors. There's only one filter nowhere near the engine, under the cab. How many miles? Knock sensors and knock sensor pigtail while you're in there - only go OEM.

 

If you are not recording wide open miss fire codes, probably isn't going to require fuel filter.

Air filter and an oil change/oil filter are done of the best preventative maintenance we can do for our trucks.

At the 100,000 mile mark, a timing belt is recommended. Might as well do the water pump at that time since it needs to come out anyways.

Welcome to Tacoma World.

Kirk.

 

It has almost 200,000 miles and I had my timing belt replaced before, I regularly do oil changes and change the air filter aswell.

 

Yes- while you have your upper and lower intake off, there are a few other things you could do.

Obviously, you need new intake manifold gaskets. I gather from your other thread, that you're trying to do this all on a tight budget. Non-OEM gaskets are probably OK. The current ones will not be reusable given the age of your truck. When I pulled mine off @145k, whatever finish was on the gaskets "flaked off" creating an uneven surface.

Prior to starting the work (like today) I'd inspect the Valve Cover Gaskets if you haven't already replaced them. 200k is about time if they aren't leaking already.
The OEM gaskets are fairly cheap, but again these are probably ok to source aftermarket. The 16 rubber washers are non-reuseable; you'll need new ones. But the job itself is actually pretty easy once you're down that far. Watch the Timmy The Toolman video for the complete how to. Other things you might need are the Cam plugs. The 1/2 moons are reusable. And some FIPG or RTV.

While you have the valve cover off- replace the PCV Grommet. They get brittle and crumble when you try to pull them out. Replacing the grommet while the cover is off, ensures that you won't end up with old grommet in your valves. Replace the PCV valve while you're at it.

I was able to do both the valve cover and injector job in one weekend. Be very meticulous in labeling bolts and vacuum lines. Take pictures, etc...

You need new washers / gaskets for the fuel rails too... Getting those torqued back to spec is also a little tricky. It's hard to get a regular torque wrench on there. I was able to use a flared crows foot.. Again, see the Timmy video for all the details on that.

The other thing you have access to at this point, are two hard-to-reach (almost impossible) vacuum lines:


They are located under the wire harness, so they are pretty hidden from view until you have it all apart. They go from the last chamber of the intake manifold back up to the IAC.

Edit: Here is a picture of the vac lines from another post of mine:
Another P0171 thread...

And while you're at it, you should replace all the other vacuum lines you can. Get yourself some various sized line from Amazon (not the parts store, because they'll sell you fuel line instead of vacuum line) and go to town.

Clean your TB, IAC, and MAF if you haven't done them recently as well.

Regarding the fuel filter- yes, It's under the truck on the driver's side. Toyota labels them as lifetime parts, but if you're replacing your injectors, it's probably worth changing the fuel filter to ensure you're not getting crummy gas into your new injectors. Go with OEM. Timmy also has a video on this. Biggest takeaway - use line / flare wrenches, otherwise you run a high risk of fubaring the hard gas line couplings- which you really don't want to do because they'll be costly to replace.

And also use caution when you're dealing with any amount of fuel. I had fans going in the garage to clear any vapors etc from the leaked fuel during both my recent filter change, and injector job.

 

This was extremely helpful and you are right that my value cover has been leaked badly so I'm going to replace the gasket and clean it with my fuel injectors. Also, your recommendation to watch Timmy the toolman was also very helpful.

 

X2 on the cam plugs, definitely change em if you have the valve covers off. In my experience they are much more leak prone than the covers themselves.

 

I used the method Timmy showed in his video on the fuel injectors- dipping the seal in gas before inserting them into the fuel rail/port, but pinched a few of the seals. I thought I was good, until I fired it up the first time, and gas came flying outta the fuel rail. I had to take the intake back off and reseat the injectors with new seals. The motorwest injectors come with a small tube of super lube, so I put a small dab of that on my finger and ran it around each of the seals prior to insertion. This was a much more successful, less error prone, approach, and I'd highly suggest the super lube over the gas.