Tenaciti 1.4i not starting

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LoW n SloW
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Tenaciti 1.4i not starting

Post by LoW n SloW »

Morning All

I have a 2008 tenaciti 1.4i thats not starting at, it did it 2 weeks ago but eventually started after a few tries, now its just completely dead.

On vcds it threw a lambda fault, i cleared that then cleaned the lambda, now i read a few posts that the Mpi system has issues, but then should i just buy a lambda and change it or would i be wasting my money?

its my daily and i have very limited funds to be doing guess work
2001 'rolla 160 gle (ex)
2000 'rolla facelift RSi (ex. miss this) - exhaust and vernier
2005 old schooled caddy (ex)
2001 'rolla RXi airbag spec (ex) - exhaust, vernier, cai
1995 vw golf 1 ((ex)
2006 seat ibiza FR 1.9 TDI (current) - cupra FMIC, straight pipe, RK mild nandos chicken sauce 132wkw, 426nm
2012 Audi A1 1.6 TDI (stock as they come)
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panic-mechanic
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Re: Tenaciti 1.4i not starting

Post by panic-mechanic »

Lambda fault will never not make it start. See if there is spark and if there is fuel pressure.
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
LoW n SloW
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Re: Tenaciti 1.4i not starting

Post by LoW n SloW »

Okay thanks bru, will check that, fuel pressure is there after the fuel filter, thats the 1st thing i checked when it happened the 1st time abut ill check again
2001 'rolla 160 gle (ex)
2000 'rolla facelift RSi (ex. miss this) - exhaust and vernier
2005 old schooled caddy (ex)
2001 'rolla RXi airbag spec (ex) - exhaust, vernier, cai
1995 vw golf 1 ((ex)
2006 seat ibiza FR 1.9 TDI (current) - cupra FMIC, straight pipe, RK mild nandos chicken sauce 132wkw, 426nm
2012 Audi A1 1.6 TDI (stock as they come)
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panic-mechanic
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Re: Tenaciti 1.4i not starting

Post by panic-mechanic »

How did you check it. By plumbing a gauge into the line feeding the rail?.
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
LoW n SloW
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Re: Tenaciti 1.4i not starting

Post by LoW n SloW »

I just checked if fuel is coming out, if the pump is actually pumping nothing more
2001 'rolla 160 gle (ex)
2000 'rolla facelift RSi (ex. miss this) - exhaust and vernier
2005 old schooled caddy (ex)
2001 'rolla RXi airbag spec (ex) - exhaust, vernier, cai
1995 vw golf 1 ((ex)
2006 seat ibiza FR 1.9 TDI (current) - cupra FMIC, straight pipe, RK mild nandos chicken sauce 132wkw, 426nm
2012 Audi A1 1.6 TDI (stock as they come)
Ashveer03
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Re: Tenaciti 1.4i not starting

Post by Ashveer03 »

If the pressure is low the car wouldnt start. Hence a gauge must be used to diagnose further..

What was the lambda code? It also possible that the car ran lean due to low fuel pressure which set the dtc.

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When a car tailgates me, i slow down - then floor it and give them a cloud of diesel smoke to choke on :driving:
LoW n SloW
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Re: Tenaciti 1.4i not starting

Post by LoW n SloW »

Ok cool and if i diagnose And find that the pressure is low, also what must the pressure be?
2001 'rolla 160 gle (ex)
2000 'rolla facelift RSi (ex. miss this) - exhaust and vernier
2005 old schooled caddy (ex)
2001 'rolla RXi airbag spec (ex) - exhaust, vernier, cai
1995 vw golf 1 ((ex)
2006 seat ibiza FR 1.9 TDI (current) - cupra FMIC, straight pipe, RK mild nandos chicken sauce 132wkw, 426nm
2012 Audi A1 1.6 TDI (stock as they come)
Ashveer03
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Re: Tenaciti 1.4i not starting

Post by Ashveer03 »

Well it depends, u can have a few faults that give low fuel pressure like a faulty fuel pump, faulty fuel pressure regulator or faulty rail. Could even be a faulty fuel pump relay or wiring to the pump. For that u will have to do separate tests..

Im not sure if the common, rail cracking problem was fixed later on or not but u could be a victim of that, u can squeeze the return fuel pipe and see if the pressure rises or if the car starts then u know the rail is faulty.

I dont have the exact spec and its difficult to diagnose without proper specs but, if im not mistaken they are a 3bar system. The fuel pressure regulator should have an opening pressure engraved on it and the fuel pressure should be at the same as engraved or else whats the point of the regulator..?

I saw mp9 (i know u have mpi, should be the same thing) cars suffer to start/doesnt start at all with 2bar and below fuel pressure.
Some perfect running cars i tested show 2.3-3bar (i guess the pumps were changed at some time).. From that, i would say 2.5bar is a little weak but should be enough to start the car.

Also take note of how long the pressure takes to build while priming (key off and on), if it takes a few tries to prime to max pressure (2.5 or 3bar) or if the pressure drops at wot then the pump is weak.

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When a car tailgates me, i slow down - then floor it and give them a cloud of diesel smoke to choke on :driving:
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panic-mechanic
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Re: Tenaciti 1.4i not starting

Post by panic-mechanic »

3 bar with the vacuum line disconnected.
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
LoW n SloW
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Re: Tenaciti 1.4i not starting

Post by LoW n SloW »

Thanks alot guys, its not fuelling, im still checking will keep updating...but seems to boiling down to the coil
2001 'rolla 160 gle (ex)
2000 'rolla facelift RSi (ex. miss this) - exhaust and vernier
2005 old schooled caddy (ex)
2001 'rolla RXi airbag spec (ex) - exhaust, vernier, cai
1995 vw golf 1 ((ex)
2006 seat ibiza FR 1.9 TDI (current) - cupra FMIC, straight pipe, RK mild nandos chicken sauce 132wkw, 426nm
2012 Audi A1 1.6 TDI (stock as they come)
Ashveer03
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Car Model: Polo 9n 1.9 TDI Sportline
Location: Durban

Re: Tenaciti 1.4i not starting

Post by Ashveer03 »


LoW n SloW wrote:its not fuelling, but seems to boiling down to the coil
What the coil has to do with fueling?

Sent from my SM-J500F using Tapatalk

When a car tailgates me, i slow down - then floor it and give them a cloud of diesel smoke to choke on :driving:
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panic-mechanic
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Re: Tenaciti 1.4i not starting

Post by panic-mechanic »

it it ain't fuelling then start with fuel pump relay and pump. Coil - not so much.
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
VAG Fan
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Re: Tenaciti 1.4i not starting

Post by VAG Fan »

"it's not fuelling" could mean...
1) the car is not fuelling, or
2) the problem is not (related to) fuelling.

Please be more specific.
Mark R.
- - - - - - - - - -
2004 VW Golf TDI, type 1J, AHF, 317k (2016-current) --- daily
1990 VW Fox, type 16, HM, 304k (2005-current) --- spare runaround
Previous:
1992 Audi 500 SE, type C4, AAR (2001-2020) --- nice while it lasted
1983 VW Golf GTS, type 17, FR (1992-2005) --- most fun car I've ever had
1978 Audi 100 GLS 5E, type 43, WC (1991-92) --- died in the side of a Rekord who cut me off
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LoW n SloW
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Re: Tenaciti 1.4i not starting

Post by LoW n SloW »

Sorry gents i meant its fuelling, its a typo
2001 'rolla 160 gle (ex)
2000 'rolla facelift RSi (ex. miss this) - exhaust and vernier
2005 old schooled caddy (ex)
2001 'rolla RXi airbag spec (ex) - exhaust, vernier, cai
1995 vw golf 1 ((ex)
2006 seat ibiza FR 1.9 TDI (current) - cupra FMIC, straight pipe, RK mild nandos chicken sauce 132wkw, 426nm
2012 Audi A1 1.6 TDI (stock as they come)
LoW n SloW
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Posts: 1968
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Location: dbn

Re: Tenaciti 1.4i not starting

Post by LoW n SloW »

The problem was/is indeed the ignition coil, tried mine on a mates car, does exactly the same thing, and we put his one back on and it starts...thanks for the support gents
2001 'rolla 160 gle (ex)
2000 'rolla facelift RSi (ex. miss this) - exhaust and vernier
2005 old schooled caddy (ex)
2001 'rolla RXi airbag spec (ex) - exhaust, vernier, cai
1995 vw golf 1 ((ex)
2006 seat ibiza FR 1.9 TDI (current) - cupra FMIC, straight pipe, RK mild nandos chicken sauce 132wkw, 426nm
2012 Audi A1 1.6 TDI (stock as they come)
LoW n SloW
Lieutenant
Posts: 1968
Registered for: 12 years 4 months
Location: dbn

Re: Tenaciti 1.4i not starting

Post by LoW n SloW »

New ignition coil and problem solved
2001 'rolla 160 gle (ex)
2000 'rolla facelift RSi (ex. miss this) - exhaust and vernier
2005 old schooled caddy (ex)
2001 'rolla RXi airbag spec (ex) - exhaust, vernier, cai
1995 vw golf 1 ((ex)
2006 seat ibiza FR 1.9 TDI (current) - cupra FMIC, straight pipe, RK mild nandos chicken sauce 132wkw, 426nm
2012 Audi A1 1.6 TDI (stock as they come)
User avatar
panic-mechanic
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Location: Benoni, putfontein.

Re: Tenaciti 1.4i not starting

Post by panic-mechanic »

awesome. So there was no spark when you tested. glad it's running again.
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
LoW n SloW
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Posts: 1968
Registered for: 12 years 4 months
Location: dbn

Re: Tenaciti 1.4i not starting

Post by LoW n SloW »

panic-mechanic wrote: Thu Oct 11, 2018 8:32 am awesome. So there was no spark when you tested. glad it's running again.
Precisely, thanks again for all the input and advice and apologies for the earlier confusion :lol:
2001 'rolla 160 gle (ex)
2000 'rolla facelift RSi (ex. miss this) - exhaust and vernier
2005 old schooled caddy (ex)
2001 'rolla RXi airbag spec (ex) - exhaust, vernier, cai
1995 vw golf 1 ((ex)
2006 seat ibiza FR 1.9 TDI (current) - cupra FMIC, straight pipe, RK mild nandos chicken sauce 132wkw, 426nm
2012 Audi A1 1.6 TDI (stock as they come)
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