Nova73

Has anyone ever replaced their fuel injectors in a 2.8L V6 I know they sit underneath the plenum and it has to be removed to get to the injectors. I guess my question is there anyway to clean then without removing the plenum? What is the best fuel system cleaner that anyone has used through the gas tank to get them all cleaned up. I understand the Red Line 60103 Fuel System Cleaner is the best and will clean them all. Can anyone out there verify that Red Line is the best product to use?

Aaron R.

The best way to clean them is remove and have professional cleaning/flow testing, or sonic clean them yourself.
A more temporary method would be an off the shelf cleaner like Red Line that you add to the tank. I personally think these are mostly snake oil products that provide no benefit, or very short term benefits. However, I have noticed a lot of guys swearing by Seafoam lately. Search the board forums for that.

Nova73

Thanks for the information. I am going to put the Red Line Injector Cleaner I bought into an empty tank, fill it up and see if it improves the hesitation and sometimes a rough idle. I really don't want to install new injectors. If I did not have to remove the plenum, I'd be okay with that. Not a job I want to tackle right now.

Whitebird75

For the injectors, I would recommend replacements. I tried a few different fuel cleaners, but nothing worked. It takes about three hours to replace them, and because the manifold is three pieces, no need to remove the middle or lower intake, just the top "Hat". The hardest part is removing the clips that hold the fuel injectors to the fuel rail. South Bay Fuel Injectors have upgraded 17 lb injectors, as I'm assuming you have MPFI; SKU 4472. FYI, they come with the O-rings already installed, making them essentially "Plug & Play", and TGO members get a discount.

Nova73

Yes, I already added Red Line Fuel Injection cleaner and I have noticed some difference in idle and throttle response. Shell gasoline also helps this cause. But I totally agree with your assessment. Replacing the injectors is the way to go. I already have the gaskets for the plenum, I just need new injectors. I believe I'll wait till Spring to tackle this job. Too cold here at the present time and just got 8" of snow.