EFI warning on but no longer a fault

EFI warning on but no longer a fault

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Let off some steam Bennett

Original Poster:

2,414 posts

172 months

Wednesday 30th May 2018
quotequote all
My tuscan developed a running fault that turned out to be a faulty tps, that was swapped and the car ran as good as new again. The diagnostics showed no faults after changing the tps. The EFI warning is still flashing up. Any ideas, cheers.

nawarne

3,090 posts

261 months

Thursday 31st May 2018
quotequote all
Simon, the warning - EFI - covers a number of different permutations.

You need to get a laptop hooked up with the diagnostics and see what fault codes are shown.

EvoOli on here has produced a downloadable diagnostics compatible with Windows8 and on.

https://www.pistonheads.com/gassing/topic.asp?h=0&...

Nick

Let off some steam Bennett

Original Poster:

2,414 posts

172 months

Thursday 31st May 2018
quotequote all
Ok thanks, i will sort it at some point

Let off some steam Bennett

Original Poster:

2,414 posts

172 months

Thursday 31st May 2018
quotequote all
nawarne said:
Simon, the warning - EFI - covers a number of different permutations.

You need to get a laptop hooked up with the diagnostics and see what fault codes are shown.

EvoOli on here has produced a downloadable diagnostics compatible with Windows8 and on.

https://www.pistonheads.com/gassing/topic.asp?h=0&...

Nick
Do you think my oil pressure sending being faulty and showing 99psi would bring the efi warning on

nawarne

3,090 posts

261 months

Friday 1st June 2018
quotequote all
Let off some steam Bennett said:
nawarne said:
Simon, the warning - EFI - covers a number of different permutations.

You need to get a laptop hooked up with the diagnostics and see what fault codes are shown.

EvoOli on here has produced a downloadable diagnostics compatible with Windows8 and on.

https://www.pistonheads.com/gassing/topic.asp?h=0&...

Nick
Do you think my oil pressure sending being faulty and showing 99psi would bring the efi warning on
...I believe that the ecu will shut down the engine on LOW oil pressure.

Therefore, with 99 psi I'd assume you'd have no fault indicated??

Just be aware that several posters on here have reported problems with failing engine looms. The internal conductors of the wiring become corroded and/or brittle through water ingress/age/heat cycling.

It might be worth getting a mate around and with the engine running 'wiggling' the loom/connections to the various sensors and see if the EFI indication goes out??.....BUT running the diagnostics will home you in on sensor issues (Crank position, lambdas, air temp, coolant temp).

Nick

Let off some steam Bennett

Original Poster:

2,414 posts

172 months

Friday 1st June 2018
quotequote all
nawarne said:
...I believe that the ecu will shut down the engine on LOW oil pressure.

Therefore, with 99 psi I'd assume you'd have no fault indicated??

Just be aware that several posters on here have reported problems with failing engine looms. The internal conductors of the wiring become corroded and/or brittle through water ingress/age/heat cycling.

It might be worth getting a mate around and with the engine running 'wiggling' the loom/connections to the various sensors and see if the EFI indication goes out??.....BUT running the diagnostics will home you in on sensor issues (Crank position, lambdas, air temp, coolant temp).

Nick
Ok, thanks for that

After we changed the tps, the car cleared its running fault but efi still came on. The loom sounds like a good shout.

nawarne

3,090 posts

261 months

Monday 4th June 2018
quotequote all
One other comment!!

Does the EFI fault indication clear when you press the large button on the RHS of dash?

If it does, and then re-appears - it might suggest there is another underlying issue?

Nick

Let off some steam Bennett

Original Poster:

2,414 posts

172 months

Monday 4th June 2018
quotequote all
Hi Nick, yes it does

nawarne

3,090 posts

261 months

Monday 4th June 2018
quotequote all
Hi Simon....

OK, to me that indicates an issue with wiring to one of the sensors/or sensor itself (as per my previous) or something not quite right with the ECU.

Think you've got to get it on the diagnostics....and the graphical data analysed by someone who knows what they're doing

Nick

s6boy

1,629 posts

226 months

Monday 4th June 2018
quotequote all
Nick makes a good point re the loom, and to be honest I don't recall it being mentioned on here before but may have missed it.
Just a word of warning though. In an effort to get to the bottom of a minor but annoying running issue I had my loom changed a couple of weeks ago and it made the car almost undriveable. As soon as the old one was put back on all was back to normal. I won't name the supplier until they've had a chance to respond. If not satisfactory and I find the time I am going to look at getting one purpose made but expect that to be quite pricey.

Let off some steam Bennett

Original Poster:

2,414 posts

172 months

Tuesday 5th June 2018
quotequote all
nawarne said:
Hi Simon....

OK, to me that indicates an issue with wiring to one of the sensors/or sensor itself (as per my previous) or something not quite right with the ECU.

Think you've got to get it on the diagnostics....and the graphical data analysed by someone who knows what they're doing

Nick
Hi Nick
Thanks for your help, the old girl is now booked in for a diagnostic check.Strange how the running fault is fixed but car still showing a fault. Lets ses what the garage comes up with

Edited by Let off some steam Bennett on Tuesday 5th June 09:10

Let off some steam Bennett

Original Poster:

2,414 posts

172 months

Wednesday 13th June 2018
quotequote all
It was the issue with the oil pressure sender that was chucking the efi up.Good to know for any future issues for us all.

nawarne

3,090 posts

261 months

Thursday 14th June 2018
quotequote all
Let off some steam Bennett said:
It was the issue with the oil pressure sender that was chucking the efi up.Good to know for any future issues for us all.
Simon, thanks for the update - and closure!!

Nick

Let off some steam Bennett

Original Poster:

2,414 posts

172 months

Thursday 14th June 2018
quotequote all
nawarne said:
Simon, thanks for the update - and closure!!

Nick
Thanks for your help Nick