Tamora running problem

[domgul]

Hi
I have nobody here in Switzerland to help with my Tamora problems.Firstly, on Saturday, the efi warning code appeared, I deleted it and drove home with no problems. This morning I drove approximate 6 kilometers, in traffic , approaching my destination the engine was not running on all cylinders.Drove the 6 kilometers back home a,car was parked for ca 4 hours, and for half the journey it was not running on 6 cylinders, suddenly the non running cylinder/ cylinders kicked in and seemed to be back to normal.Stopped and shut down the engine whilst waiting for a train at an railway crossing, started it up and again not running on all cylinders.
Any/ all help would be greatly appreciated to resolve this problem.
Thank you
Regards
Dominic Gulotti

[shep1001]

domgul said:

Hi
I have nobody here in Switzerland to help with my Tamora problems.Firstly, on Saturday, the efi warning code appeared, I deleted it and drove home with no problems. This morning I drove approximate 6 kilometers, in traffic , approaching my destination the engine was not running on all cylinders.Drove the 6 kilometers back home a,car was parked for ca 4 hours, and for half the journey it was not running on 6 cylinders, suddenly the non running cylinder/ cylinders kicked in and seemed to be back to normal.Stopped and shut down the engine whilst waiting for a train at an railway crossing, started it up and again not running on all cylinders.
Any/ all help would be greatly appreciated to resolve this problem.
Thank you
Regards
Dominic Gulotti

Check the plugs to all the injectors are secure. Do you have the diagnostic software and lead to see whats happening?

[domgul]

Hi
I checked plugs to injectors,seemed ok.I don't have a diagnostic lead, I was given instructions how to make one ,unfortunately didn't get very far.I'm prepared to buy a lead if they are for sale or somebody would make one for me.
Thanks
Dominic

[shep1001]

domgul said:

Hi
I checked plugs to injectors,seemed ok.I don't have a diagnostic lead, I was given instructions how to make one ,unfortunately didn't get very far.I'm prepared to buy a lead if they are for sale or somebody would make one for me.
Thanks
Dominic

Have you checked the HT leads, coil pack & their connections too? this could also be the reason for dropping a cylinder if there is a poor connection or a broken HT lead. The diagnostic cables can be had from TVR power IIRC.

[bubblebobble]

HI Dominic,

did you ever sort out your overheating problems my friend?
If so what was the final diagnosis? and fix?

Sounds like the ignition circuit as already said, coil pack, leads (breakdown when hot) ,dodgy plug etc

Someone else will be along to help I am sure but always start with the simplest first and be methodical.
But a would think any regular mechanic would be able to diagnose this, that's what they do after all.

Get yourself a lead, the software is free. They are invaluable.

Best of luck

[domgul]

Hi
Will check the suggested problems with a mechanic friend tomorrow morning and purchase the diagnostic lead.Heating problems sorted ,bad elecrtical connections (corroded)close to the fans themselves.thanks for all the help.
Perhaps using the car more often ,winter pretty tough here sometimes,would help matters.I love the car,only 3 registered in Switzerland, but (excuse my language) st my pants every time I go out in it expecting the worst.
Regards
Dominic

[optimax sniffer]

We were in Switzerland last week in our tam. Great place for driving.

When we went up stelvio and the grimsel pass, we got an EFI Fault as the mixture was out of spec due to the altitude.

[domgul]

Hi Folks
Tamora started again this morning not on all cylinders, cleared itself ca 5 minutes into an 25minute drive to my mechanic.We ordered new plugs NGKRDCPR8E (plugs ca 1 year old which were supplied from the U.K garage who sold me the car).Test drive ca 15 minutes to collect something, on way back to the garage happened again, not running on all cylinders.Exhaust is black soot.
Back at the garage removed the injector electrical connectors individually, no reaction (engine revs didnt change)on no 1 cylinder.Measured volts,ohms ? (running engine) on 3 injector connectors, no 1 ca 15-16,no 2 ca 24-25, no 3 ca 25-26.
Checked we had spark on no 1 cylinder which it has, no 1 cylinder plug slightly wet.
What do i do now ? Excuse my technical speak.
Thanks in anticipation of ,hopefully, not a big problem.
Regards
Dominic

[Laser Sag]

Can't help with your problem I am afraid but would suggest a chat with Dom or Jason @ Powers Performance or Jason @ Str8Six, both are very helpful from past experience and will be able to suggest some things to try and check.
Hope it turns out to be nothing more than a dodgy coil pack or lead.

[peteA]

domgul said:

Hi Folks
Tamora started again this morning not on all cylinders, cleared itself ca 5 minutes into an 25minute drive to my mechanic.We ordered new plugs NGKRDCPR8E (plugs ca 1 year old which were supplied from the U.K garage who sold me the car).Test drive ca 15 minutes to collect something, on way back to the garage happened again, not running on all cylinders.Exhaust is black soot.
Back at the garage removed the injector electrical connectors individually, no reaction (engine revs didnt change)on no 1 cylinder.Measured volts,ohms ? (running engine) on 3 injector connectors, no 1 ca 15-16,no 2 ca 24-25, no 3 ca 25-26.
Checked we had spark on no 1 cylinder which it has, no 1 cylinder plug slightly wet.
What do i do now ? Excuse my technical speak.
Thanks in anticipation of ,hopefully, not a big problem.
Regards
Dominic

My first thing to check would be the coil pack - its under the air box. Check the service history ans see if you can tell when the car last had a new coil pack, leads and plugs....i would replace all of them but one at a time so that you know what the problem was.

Hope you get it sorted

[domgul]

Hi
Thanks for suggestions.The coil pack has nothing to do with the injectors or am i wrong ? Removal of no 1 cylinder injector connector (running engine) resulted in no rev reduction.Removal of injector connector cylinder 2-3 resulted in an drop in engine revs.
Plug no 1 is sparking.
Thanks
Dominic

[bubblebobble]

Dominic,

this has to be an injector problem or related.

has the injector been checked?
I would check the voltage to the injector, i am sure someone here knows what to look for.

You really that diagnostic lead, can you not get someone to make one up ? It would really help you.

good luck

[twinreal]

Dominic,

call acs-pro in germany for a quick delivery of the diagnostic lead. If they aren't in stock, leave me a message, i will make you one.

Thomas

[domgul]

Hi
I have just ordered the diagnostic cable for my tamora, should be here on Friday. Can anybody advise where I can download the diagnostic software ?
Many thanks again for all the help.
Greetings
Dominic

[bubblebobble]

Dominic,

I got mine from here:

http://www.mytuscan.co.uk/downloads.php

user manual there too.

D

[flying]

Just been reading your problems and a couple of years ago I had similar which was quite annoying in my case the problem stemmed to part of the wiring loom to the injectors breaking down and was sorted in the end by Dom at power I am not sure of the electrical readings but I'm sure he would advise hope this might help in some little way to getting it sorted.

[domgul]

Hi Bud
Thanks for you help last year and now.Excuse my ignorance/stupidity.I checked the download page for the straight six engine, i need to download all the software, x entries on that page ?
I should have the diagnostic cable tomorrow so will see what crops up over the weekend or monday regarding faults.I was told,though, that the diagnostic faults/fault that come up give you an idea of what is wrong, this then still has to be narrowed down to the exact problem ?
I would be prepared over winter to get my Tamora transported to a reputable TVR garage in the U.K for full check,service so i have more peace of mind when using the car.Can you reccomend somebody.
Again thanks for your help.
Regards
Dominic

[bubblebobble]

Dominic

I have sent you an email.

d

[domgul]

Hi
Ongoing Tamora saga.My Tamora was diagnosed today,all values within limits.The car still has a problem with number 1 cylinder.I purchased a new injector which we installed, might of run on all 6 cylinders at first,of course when we decided to go for a test drive then back to 5 cylinders.
Number 1 cylinder ,when the injector connection is removed or ht lead removed ,has no effect on idle rpm.All other cylinders drop in rpm when injector cable/ht lead removed.
We also a swapped injector 1 (new) with injector 2 , made no difference, cylinder 1 still no idle drop after removing injector cable/ht lead.
The plugs have been checked,swapped over,still original problem with cylinder 1.
My next Plan of attack would be new coil pack and leads.
Any further ideas/ suggestions would be much appreciated.
Thanks everybody
Dominic

[Basil Brush]

This could be a stupid thing to say but as it's batch fired, can you swap the injector wires between two on the same driver and see if the missfire follows the swap?

Have you checked compressions and valve clearances?