jaygo7007

is there a how to for replacing a fuel injection unit for the lnf?

or would that be something i go to the dealer or a shop to install?

Grave

iTrader: (7)

I would go to the dealer before relying on a how to from this site.

That being said, if you want to do it yourself, pickup a service manual. There are a few things that will need to be replaced because they are considered one use and/or torque to yield.

jaygo7007

ok guess to the dealer i go. what else would be needed? hopefully the dealer has whatever else would be needed.

Grave

iTrader: (7)

Actually, I doubt they have most of the parts needed. 90% of the time I go in for parts for my LNF, they are special order. Some things that will be needed off the top of my head: intake manifold gasket, throttle body gasket, and a high pressure fuel pipe. All inexpensive compared to a fuel rail and I assume injectors.

Can I ask why you are replacing the fuel rail?

jaygo7007

Thanks for the info. I thought I could just swap my fuel rail for the upgraded fuel rail. Was looking to getting this done tomorrow

Macgyver2484

iTrader: (3)

The fuel rail is right on the top under the intake manifold. I can't imagine the job being too hard if you’re just swapping.

jaygo7007

I heard it would be cheaper to replace the fuel rail then to just buy the upgraded seals. I have the 08 fuel rail and I'm pretty sure they are ruined. Lately when I boosted the car stays to make popcorn

FasterIsBetter

It could be something else. Have you been running E85? It could be plugs or a boost leak if you haven't been.

jaygo7007

I ran e85 for about a month but switched back to 93. I been running 93 for about 4 months now. I keptt popping the cel for a vaccuum leak which I found out was my intake, and I keep popping a cel for leaking injectors or fuel pressure regulator. And I had my whole fuel pump replace last month

Grave

iTrader: (7)

No, it would be a lot cheaper to just replace the seals. There is a special tool you will need to install the seals though. You should be able to find it on ebay pretty cheap.

I would try changing the plugs first though. OEM AC Delco or whatever the NGK equivalent is, gapped at .032''.

Grave

iTrader: (7)

It's not, but if you don't have the right parts and tools you will create new problems.

tomj77

iTrader: (2)

Don't listen to this guy about the how to's if a guy makes an effort to do a howto he obviously made an effort to to do it right. The how to section is great, just double check the torque specs .

jaygo7007

i already have the 2010 fuel rail headed to me. ups is dropping it off soon.

i have ngk sark plugs in now. they are gapped at .035. ill run to the dealer around the corner and try stock plugs

Grave

iTrader: (7)

Maybe the guy that made the how to did something wrong, but it worked for him. He would be telling people to do something wrong that might not work for everyone. A fuel rail installation on an LNF is a little bit more critical than say, changing headlights.

Grave

iTrader: (7)

There are NGK's that are the same as the stock AC Delco plugs though. If that's what you have, then try gapping them at .032''

At the very least, I would replace the intake manifold gasket. You might try giving CED a call. They would probably have everything in stock, and may be able to tell you exactly what you need.

Stamina

-Let car sit overnight
-Remove IM
-Remove the pipe supply fuel to the fuel rail from the HPFP (why you're needing to let it sit, so no pressure is in there still)
-Remove bolts holding in rail and electrical connection going to pressure sensor on the end
-Pull out the rail

-Push in new rail
-Bolt it back in and connect electrical connection to the pressure sensor on the end
-Reconnect the fuel pipe between the rail and the HPFP
-Reinstall the IM

Enjoy your lack of popcorn.

Done it both on my car and others. It's a straightforward swap.

Grave

iTrader: (7)

It's possible to change the rail without taking the intake manifold off?

Stamina

IM = Intake Manifold

No, I don't think it would be that easy. It's sandwiched right under it. Even if you can get to all the bolts without removing the IM, you may still run into the issue of bumping into the IM while trying to pull out the rail because of the angle that it comes out.

Long story short, you're best off just pulling the IM. IMO it'll make the overall job easier too either way.

Grave

iTrader: (7)

I missed the second step apparently. Sorry.

jaygo7007

With all that said I'll be needing to set a appointment with the dealer to install. Lol. Thanks

tomj77

iTrader: (2)

Maybe, this is true, but usually how to is posted after the guys car is running right. That's why u reference different sources of info. Make sure it's right