8492bird

How long should it take to change the fuel injectors on the 3.1 engine? I've read the tech article but that's for a V8 which seems to require removal of a lot of stuff that the V6 does'nt have. I plan on going to the JY later this week to "practice" but am trying to get an idea on the time required.

Also, the manual says to disconnect the fuel lines at the fuel rail; looking at the car it looks like it might be easier to disconnect the lines at the flex connection outside of the plenum. Any suggestions?

mvftw

iTrader: (1)

2 hours if you know what your doing...I have a 2.8...I disco the fuel line's at the fuel injector housing...Not a bad job...Get NEW O-Rings...

8492bird

The new injectors have new O-rings. What size(s) are the O-rings for the fuel line to rail connections?

Drew

iTrader: (58)

If it takes you two hours, you're taking too many beer breaks.

Pull the vacuum lines off the back of the plenum, one is your brake booster the other is the MAP sensor.

Unbolt the EGR tube from the plenum, careful don't lose the gasket.

Unbolt the throttle body from the plenum.

Unbolt the throttle/TV cable bracket from the plenum.

Remove the A/C pump support bracket (if equipped)

Remove the Plenum bolts

Top half of the plenum should lift off easily, set it aside.

Unbolt the fuel lines from the fuel rail. Use the right size wrench, make sure it fits tight. Slip it completely over the tube fitting so its lined up on the flats exactly, strike the wrench firmly to crack it loose. If you use steadily increasing force instead of giving it a swift blow it will round off the fittings and you'll have to replace the fuel lines.

Disconnect the fuel pressure regulator vacuum line.

Remove the two fuel rail retaining bolts.

Carefully pry the fuel rail with injectors free of the intake manifold.

This actually takes longer to type then it takes to do it.

Use a little oil on the new injector O-rings when installing to prevent tearing. You don't need to reuse the injector clips unless you want to, if they're not there it won't matter. The injectors aren't going anywhere when the fuel rail is bolted in place.

Reassembly is the reverse of disassembly.

Shouldn't take more than 30 minutes if you're taking your time all the while painting a landscape with Bob Ross... With 2 hours you should be able to completely pull the engine, rebuild it and reinstall it with time to spare.

I've actually got my first injector swap I ever performed on my 3.1 on video tape, took 35 minutes to swap injectors. It was the first work I did on the car.

86TpiTransAm

I know this is an old post but I just have to add something... plus I'm sure this post will be read again if people search like I did when trying to find this info.

"Shouldn't take more than 30 minutes..." means IF you have all the right sizes of tools in an organized fashion and don't have to run back and forth from your apartment to the parking lot 10 times just to get the right tools or have to drive to the parts store because for some reason you can't find the size wrench/socket that you need even though you just had it the other day and now it's magically disappeared. AND if you don't break anything and have to drive to the parts store, hoping and praying that they have what you broke and if not, you're probably screwed because it's a weekend and the dealership is closed and even if the dealership was open they probably wouldn't have the part in stock anyway.