Not so nice to drive!
Discussion
The V6S isn't so nice to drive at the moment.
Having replaced my TP the other day with a Cerbera 4.2 type it was much better but not perfect, also the car has started to jerk again but only over bumps leading me to believe that the TP connector is past it's best resulting in a lost connection over bumps. On inspection I noticed that it has a damaged centre connector in the plug and this is making the car run badly when disturbed. Must see if I can get a new one ordered on Monday, I'll go for the plug with the gold connectors that match the new Cerbie TP socket. Other than this, I still seem to have a poor pick up of acceleration at low revs and a bit of hesitation. I have changed the idle control valve and fitted a new lower air flow meter (the upper one is for air temperature only, so I'm told). This lack of response varies during warm up. Where abouts is the temperature control sensor that I've heard mentioned, or is this the upper air flow meter?
I've done all the other sensors so I may as well change this too (if it's not the a/f meter). If it's a sensor, does anyone have a part number and is the standard V6S part the best choice or can it be upgraded to anything else (like with the Cerbie TP)?
As Podie mentioned, it could be that I'm running too lean. Is there anyway that the fuel/air mixture can be adjusted, or is this done solely by the ECU? Is a re-map the only the answer to getting a richer mixture?
I guess it could also be the injectors! I'm going to replace/refurb these soon anyway as they've done over 100k miles.
Any thoughts on any of this?
Your advice/help is much appreciated.
Cheers,
KS2
>>> Edited by kentishS2 on Sunday 8th August 10:21
Having replaced my TP the other day with a Cerbera 4.2 type it was much better but not perfect, also the car has started to jerk again but only over bumps leading me to believe that the TP connector is past it's best resulting in a lost connection over bumps. On inspection I noticed that it has a damaged centre connector in the plug and this is making the car run badly when disturbed. Must see if I can get a new one ordered on Monday, I'll go for the plug with the gold connectors that match the new Cerbie TP socket. Other than this, I still seem to have a poor pick up of acceleration at low revs and a bit of hesitation. I have changed the idle control valve and fitted a new lower air flow meter (the upper one is for air temperature only, so I'm told). This lack of response varies during warm up. Where abouts is the temperature control sensor that I've heard mentioned, or is this the upper air flow meter?
I've done all the other sensors so I may as well change this too (if it's not the a/f meter). If it's a sensor, does anyone have a part number and is the standard V6S part the best choice or can it be upgraded to anything else (like with the Cerbie TP)?
As Podie mentioned, it could be that I'm running too lean. Is there anyway that the fuel/air mixture can be adjusted, or is this done solely by the ECU? Is a re-map the only the answer to getting a richer mixture?
I guess it could also be the injectors! I'm going to replace/refurb these soon anyway as they've done over 100k miles.
Any thoughts on any of this?
Your advice/help is much appreciated.
Cheers,
KS2
>>> Edited by kentishS2 on Sunday 8th August 10:21
Is it me or, is it often difficult to diagnose a running fault on the V6S?
If you unplug anything it goes into a default running/limp home mode, so you can't always tell if something is working or not.
I'm thinking of looking for a £100 2.9 V6 12v granny without MOT etc but runs perfectly so that I can play with it and borrow bits from it, the downside is that it would have to stand on the drive, could always put a cover over it to hide it
>> Edited by KentishS2 on Sunday 8th August 15:46
If you unplug anything it goes into a default running/limp home mode, so you can't always tell if something is working or not.
I'm thinking of looking for a £100 2.9 V6 12v granny without MOT etc but runs perfectly so that I can play with it and borrow bits from it, the downside is that it would have to stand on the drive, could always put a cover over it to hide it
>> Edited by KentishS2 on Sunday 8th August 15:46
Have you tried new HT leads? My experience was these were always the problem - if it wasn't the throttle pot. The rotor arm, distributor cap etc seem to last forever (well 50,000 plus). The red Ford leads last a couple of years, horrible black lucas things I tried once lasted a couple of months before one went dodgy.
Assume the plugs are good as well (changed every 6000?)?
Air flow meter info sounds a bit suspect. As I understand it both are used to measure airflow and both have temperature sensors fitted but only one is wired up for temperature (the one with more contacts in the connector on the cable).
>> Edited by chris_chim on Monday 9th August 08:05
Assume the plugs are good as well (changed every 6000?)?
Air flow meter info sounds a bit suspect. As I understand it both are used to measure airflow and both have temperature sensors fitted but only one is wired up for temperature (the one with more contacts in the connector on the cable).
>> Edited by chris_chim on Monday 9th August 08:05
Sorry to hear about the trouble you have. Just don't give up. Once it is sorted every drive in the S will make all kinds of trouble go away!
I think it sounds reasonable that the TP connector could be the cause.
Just thought I'd mention things that I have done that improved the running of my S (just as a side information to the subject). The first thing that made the car run smoother was replacing the distributor cap and rotor arm which were a bit knackered. The second thing that made the car run even better was when I used a bottle of STP Injection Cleaner. That removed some of the minor jerkiness on low throttle.
Johan
>> Edited by Johan G on Monday 9th August 08:21
I think it sounds reasonable that the TP connector could be the cause.
Just thought I'd mention things that I have done that improved the running of my S (just as a side information to the subject). The first thing that made the car run smoother was replacing the distributor cap and rotor arm which were a bit knackered. The second thing that made the car run even better was when I used a bottle of STP Injection Cleaner. That removed some of the minor jerkiness on low throttle.
Johan
>> Edited by Johan G on Monday 9th August 08:21
Thanks guys.
I've done the TP (Cerbera one fitted Thursday), fitted new cap and rotor a week ago, new plugs a couple of months ago, new fuel pump and filter (but not the one inside the tank) new airflow meter a few months ago (interesting point about the operation of these, I fitted a new lower one and it does make a difference if you unplug it but the old top one makes little difference, I'll look into this some more).
The only bits I haven't replaced are the upper airflow meter and the plug leads, the latter don't look old and are the red Ford ones, having said that they are at least 2 years old as I haven't replaced them since I bought the car. Ohh and the air temp sensor (don't even know where this is).
I may as well replace these few things now as there isn't a whole lot left to do on the grand scale of things!
I've done the TP (Cerbera one fitted Thursday), fitted new cap and rotor a week ago, new plugs a couple of months ago, new fuel pump and filter (but not the one inside the tank) new airflow meter a few months ago (interesting point about the operation of these, I fitted a new lower one and it does make a difference if you unplug it but the old top one makes little difference, I'll look into this some more).
The only bits I haven't replaced are the upper airflow meter and the plug leads, the latter don't look old and are the red Ford ones, having said that they are at least 2 years old as I haven't replaced them since I bought the car. Ohh and the air temp sensor (don't even know where this is).
I may as well replace these few things now as there isn't a whole lot left to do on the grand scale of things!
I would go for new HT leads first or substitue some known good ones. Don't think they last too well given the higher under bonnet temperatures for the TVR compared to a granada.
I found that they can look fine and all appear to be working but give intermittent problems of the type you describe.
Might be worth trying those expensive solid cored racing leads as they claim to be better at higher temperatures. No experience of them personally.
p.s. Air temp sensor is in the air flow meter.
>> Edited by chris_chim on Monday 9th August 11:06
I found that they can look fine and all appear to be working but give intermittent problems of the type you describe.
Might be worth trying those expensive solid cored racing leads as they claim to be better at higher temperatures. No experience of them personally.
p.s. Air temp sensor is in the air flow meter.
>> Edited by chris_chim on Monday 9th August 11:06
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