Ambulance runs like s#@t on 1,3,5,7 cyls

kellyf · August 28, 2009

Have f-450 2007 ambulance.When off idle ,power balance shows

1,3,5,7 cyls wack.Ran the bubble test as seen in the article section ,but saw no bubbles.Customer states that when it warms up,problem disappears.Passes koeo and koer test and buzz test.fuel presure good under load.Performed ficm update,believe it or not this had never been done,Truck seems to run better when cold but not solved.This leads me to believe I have some bad injectors.REmember something about fuel rail dampener sticking,broke causing issues on one bank.What do you guys think?

gasgasman · August 28, 2009

Sounds like you have a fuel problem.

Check the fuel filter for grey paint like debris. Fuel tank may be delaminating.

cbriggs · August 28, 2009

Souns like fuel starvation of some kind, may have had a plugged filter in the past and has since been swapped out.

Keith Browning · August 28, 2009

Kelly by what you reposrt I would bet on injectors myself if all other diagnostics pass.

I currently have a van in my bay that was recently in for a no start that needed injectors on bank 2. It has come back and now it lacks power cold but runs great hot. It needed the injectors in bank 1 to correct that issue. Since I did not get to drive this van with the original injectors my guess it recently ran poorly cold before one injector failed on bank 2 causing the no start.

I would still pay attention to the fuel filters and the tank as suggested. The fuel tanks in these trucks rust...

kellyf · August 28, 2009

Thanks.TheWhen I drove the truck with fuel pressure gauge taped to window,fuel pressure went down to 48psi.also truck with not boost over 18 at wot.Does this seem normal.Thanks for replying,because I known this subject has been covered before.

kellyf · August 29, 2009

injectors fixed this pig.

Aaron · August 29, 2009

Glad you got it fixed! Aren't E-series injectors FUUUUUUUUHHHHHN?

Posted Image

Jim Warman · August 29, 2009

Don't be afraid to run the buzz test cold... (there is a new flat spot on my forehead). LOAD% and MF_DES are still good PIDs to look at sometimes...

Keith Browning · August 29, 2009

Glad you got it fixed! Aren't E-series injectors FUUUUUUUUHHHHHN?

Yes, good job!

I seem to have attracted a lot of Econolines needing injectors lately. Posted Image

It is definitely having a negative affect on my morale. Posted Image

GregKneupper · August 29, 2009

I actually like doing injectors in the e series. They pay alot better than the f series. Lucky for me though we do not work on any ambulances or any other kind of modified e series usually. 95% of them are regular panel vans with no add ons.

Mr.Meanwrench · November 20, 2009

I don't mind the e series......i know, it's just wrong..

Mbl35 · November 21, 2009

Hi, this my first post on this site. I had an 07 e350 box lance about a week ago

with pretty much the same concern. Anyway after all diags and tests all 8 injectors and holddowns fixed it. At my shop we see our fair share of 6.0 injectors. Our fleet is mostly eseries, some duramax vans and 2 fseries-which to me is like a vacation compared to the econoline-when it comes to doing injectors that is.

Mekanik · November 21, 2009

I actually like doing injectors in the e series. They pay alot better than the f series. Lucky for me though we do not work on any ambulances or any other kind of modified e series usually. 95% of them are regular panel vans with no add ons.

I didn't know there were E-Series out there that aren't either school busses or ambulances.