2005 V70NAM56 No start condition, prelim diagnosis 30742823 Topic is solved

Post by **abscate** » 16 Jan 2018, 09:00

Warmed up the 2005 for five minutes, then drove to a breakfast meeting. Temp gauge reached about 1/3 up the way, so car did not reach full operating temperature

One hour later, no start.
Ambient temp last night 10F, morning 22F
Cranks well, sputters, but does not catch.

My symptoms point to water in fuel (much rarer than proposed), bad coil, bad ECT

Get a lift home, return with tools. Add 1 bottle HEET to tank (half full), take about 5 minutes to get hood up due to ice.

Car then starts, high idles, and runs great.

Will monitor and report back.

I will measure ECT resistance in warmer weather to check this.

Post by **abscate** » 16 Jan 2018, 14:56

Drove it home, then tried restart.

Cranks well, no start.

Scored on the first diagnostic - no fuel pressure at rail 0 psi.

Ill be diving into the fuse, fuel pump relay, fuel pump, PEM system to find root.

>> I can't emphasize enough how getting the right diagnostic tool saves time. I could have spent 2 hours pulling plugs, checking coils, immobiliser, etc...but the fuel gauge took 3 minutes and took me right to the problem.

Post by **abscate** » 16 Jan 2018, 19:57

Hmmm, releasing top of fuse box isn't intuitive and VIDA directions suck

Anyone got pointers?

Post by **jonesg** » 16 Jan 2018, 21:26

abscate wrote: ↑16 Jan 2018, 19:57 Hmmm, releasing top of fuse box isn't intuitive and VIDA directions suck

Anyone got pointers?

Had my cover off many times. It always comes off easy, pull tabs in and pull lid up.

Maybe you need a small screwdriver, freezing cold hard rigid plastic and no heated garage.

Post by **abscate** » 17 Jan 2018, 04:39

Top came off fine, I'm trying to release upper layer of fuse box to access fuel pump relay below.

My bad writing comprehension.

I think I have to release positive power bus nuts, my Alldata direction aren't very well written

Post by **RickHaleParker** » 17 Jan 2018, 07:17

Hmmm, releasing top of fuse box isn't intuitive and VIDA directions suck

Anyone got pointers?

You right the directions read like they where written by Microsoft Information.
From what I'm reading, you go up under the drivers side dash to get to the Fuel Pump Relay.

Post by **abscate** » 17 Jan 2018, 07:48

Got the fuse box lid off to access FM2, fuel pump relay 40A

Its 5 torx screws and also release main 12V feed (M8 nut, two fat red wires)

Of course, battery disconnected first (NEGATIVE, then POSITIVE) before messing with this.

40A fuse tested ok.

Glad it wasnt just me on those directions...WTF?

Post by **abscate** » 17 Jan 2018, 08:04

OK - I think Im going to spend a lot of time looking for a relay for my Gas B5244S engine...it doesn't have one.

The CEM (4/56) talks to the Fuel Pump control Module (4/83) which runs the pump controlled by feedback from the pressure sensor on the rail.

Ill need VIDA to move forward and figure out what isnt talking to what.

Reference Fuel Pump control Unit 30742823 $322 at FCP in stock

Post by **abscate** » 17 Jan 2018, 08:15

PS - off topic - what kind of car warns you that the FPCU is going one week before two long trips by futzing out 1/2 mile from home, then getting you home, then promptly quitting again making diagnosis in the driveway easy?

Post by **abscate** » 17 Jan 2018, 10:37

More info on the P2 Fuel Pump control module

This one starts out in life attached to the RHS of gas tank, accessed through the rear seat via a panel, but VIDA tells you to relocate it in the spare tire well - probably to prevent corrosion. Might be cause here.