Nissan 300ZX
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How do you install fuel injectors in Nissan 300 ZX?

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2011-09-13 04:49:34
2011-09-13 04:49:34

Check out this site: www.twinturbo.net There you will find all the info you need and then some. From that site, there is a link to twinturboz's of Dallas. You will find a complete removal and installation guide with photos.

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Answer 2:

Also DO NOT FOLLOW THE INSTRUCTIONS TO DRILL YOUR INTAKE. It's pointless and takes even more time to even get to your injectors. Your best bet is to Take the intake off by which it only took me about 30 minutes,

Remoe the coil pack plugs and injector plugs, TPS sensor plug and vac hoses on that black air crossover, IACV plug and whatever the other plug is next to it. Then remove the temp plug and temp plug next to it as well. Man thing is to allow the harness to be free from the intake

There's a crossover hose for the water and just cut that if it's as hard as a rock. take the plastic intake vac hoses off, take the center bolts off the intake, there are two bolts per side on the intake in the middle, remove those.

on the driver side back side of the intake there's a large 5/8th's hose that will stump you every time near the IACV, remove that however you can and repeat on the passenger side

THE INJECCTOR PLUG MIGHT HAVE METAL CLIPS SO REMOVE THOSE FIRST BEFORE LIFTING THE PLUG OUT.

There are two 10mm bolts on the bottom where the two metal rods connect the intake towards the front bottom side of the intake(Dont know that piece yet) remove those.

the intake should come off.

NOW there's two bolts per injector holding the injector down. I know from experience that they will be locked into place but can easliy be removed....

Get some vice grips and lock it down on the Philips head of the screw(Just enough to lock it down firmly, not he-man tight. and give it a little twist(No this will not ruin your bolt nor prevent you from install it back, this is the way I did it to prevent me from stripping the head it self.)

Repeat that for the other side of that injector and that's it, you should be able to pull it up.(Repeat this step for the other 5)

From there you should be able to see the other bolts that keep the fuel rail in place so you handle that.

The injectors are hard as hell to remove so be ready to use some muscle a little bit. I just pryed in different sections to remove them because it didn't matter if the the plastic was broke or not because they were all bad pretty much.

after remove the old beat down injectors, have a bit of wd40 or silky gas solution because you will be using that to lube up the holes to place the new injectors in.

BE SURE TO CLEAN THE HOLES FIRST.

Now grab a q-tip or your finger whatever and dip it into the wd40(I prefer) and just run your fingers around the lower and upper hole of that injector port and gentle place the injector in. Then go ahead and push down simoltanuously on each side of the injector to evenly place it down. Now go ahead and place that cap and the two bolts on it which will finish it down. Tighten it down little by little on each side.

Repeat that last step for the rest of them and them re-install and you have yourself a running car. Be sure all of your hoses are placed back.

TIP: i went ahead and remove that pointless black piping for the fuel and ran an aftermarket fuel pressure regulator to the inlet and a hose back to the return line. That black piece is just used for fuel dampening and regulating which I find that is ok but pointless.

Besides the fuel was dampened and then it was regulated... CRAZY!!!! So in place where the inlet side goes, just install a jdm adjustable regulator and the outlet just straight hose it back to the return hose and leave it at that.

From that air crossover piping on the intake, just cap the vac ports off. I'm running 93 in mine as that's what the car calls for so don't go believing cheap gas it what is needs. The timing is so far advanced and your coils are good. If you have to use cheap gas, back off your CAS a bit

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When inserting the injectors into place, DO NOT use WD40. Please use either grease or vaseline. Just dabb it on all over the rubber seals.

Using WD40 could work, but unfortunately you will still run the risk of pinching the lower seal when installing the injectors. This will cause that cylinder to flood up when the engine gets turned on. You would then have to pull everything back out and replace the lower seal on the injector.

Good answer though.

dream300zx@gmail.com

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