For those that don't know... I had may car in the shop for about 24 hours after a CEL was thrown, I found 3 DTCs (P0627, P0087, and U46B), and the engine died in the road yesterday during rush hour when I was taking it in... these codes are related to the LPFP, low fuel rail pressure, and a communication code from the fuel pump module.
I learned 2 things in the last 24 hours... #1) 300CHP will be dangerous in the Focus RS (my rental) and I fear many will follow the Hellcat path.... and as I drove home today... #2) The SHO in stock tune is still pretty much of a beast! ...and still made me smile...BIG!
Turns out two parts were defective... The HPFP was OK. So for those of you keeping track... here's what happened and the part numbers plus some info that may be of use:
First, the LPFP and sender assembly (PN DA5Z*9H307*F) as well as the gasket set (PN 4L3Z*9276*AA) were replaced after CON Code 42 and DTC P0627 were found as well as raised command voltage to the LPFP. BTW the LPFP is no longer inside the gas tank, at least not on a '13, I learned. They specifically told me they did not have to enter the gas tank for access....it's on the driver's side of the tank now.
Then they test drove it... and the engine died at a stoplight. ...Back to the shop and found the LP fuel system testing failed. Specifically, testing the power at the LPFP again revealed the the fuel pump module (PNAA8Z*9D307*B 20140704) intermittently the voltage sent from it to the LPFP was not raising as it should for a given throttle position. This was replaced.
Road tested again... they put 50 miles on the car (OK by me). All found completely functional.... The Low fuel rail pressure was corrected, and was apparently due to lack of fuel getting to the HPFP
I tested a bit myself on the way home, but it started raining and was rush hour, so I calmed down and drove like a good little boy.
They also did an update of the ECU... I checked after I got home as this was not on the work order... I had a new strategy code and a new software ID (due to Ford update)... I have talked on the phone with Jamie and JT at LMS and I'll send them an email tonight with the info and get a new version of the v8 tune (with my mods of course). I also discussed changing the fan turn on temps...turns out Dan uses a different sensor than the ones I've seen reported from Torque and Aeroforce (all the info i could get)... and he uses 140 degrees cut on in the T-stat adjustment.... anyway he said they can adjust that from distance... so I will ask him to go to 160 degrees (same as the thermostat opening temp) and see what happens. I also discussed a 50-75 rpm increase in idle speed, which they thought would be OK, due to just the slightest hint of drone at idle once the engine enters closed loop operation. All good news.
Finally... Back to the Ford house saga... they also replaced my rear interior door handle assemblies under the new recall, replaced my LP lights under that recall...and last, but not least they put a brand new battery in the SHO because it tested weak on one cell during the multipoint inspection. When the LP lamps were replaced they didn't transfer the LED bulbs.... My service advisor is GREAT... Shane went dumpster diving and retrieved them... what a man!
You can bet he'll get high praise by name on the Ford survey!
The bill for all the parts, labor, new battery and a rental car (Focus SE) that beat on a bit during 200 miles driving was ZERO...NADDA... $0.00... I am very pleased to say the least.
I can hardly wait for the tune update and the rain to stop... but we only get about 8-12 inches a year... i also learned that the MDesign CAI doesn't ingest water!
