V8 stalling help please

[sparkypete]

Hello peeps

Well after looking for a Wedge I defected to the S series stable when i found a V8S, I just had to have it.

However i seemed to have inherited a problem with the tick over. On the way home the car ran great, when i came of the motorway and slowed at junctions and lights the car would not tick over and the revs fell. This was the story until i got home,turned of the engine to open garage and started her up again, all was well, tick over back and OK.

Thought this forum would be full of V8 wizards so any help and advise as to what to try would be greatly received.

many Thanks

Pete

[adam quantrill]

Sell it and get a Big Bad Wedge!!!

[blaineuk]

mine will tick over but a bit high, once warm i turn it of and restart it, this resets the stepper motor and every thing is fine.

[adam quantrill]

Seriously though, rule number 1 is: check the water temperature sensor. This is the usual thing, and is very easy to test.

Someday we should do a fault finding flowchart for the old V8....

[jmorgan]

I suppose all pipes good and tight with no leaks or splits? I was asked to check them when I had a similar problem. Then I checked the stepper motor (assuming yours is a hot wire) then found poor connections on the cable to AFM connection.

[jmorgan]

Whilst a topic is open on this, came across these the other day.
http://www.g33.co.uk/fuel_injection.htm
http://www.britishv8.org/Articles/Rover-14CUX-EFI....

[leorest]

adam quantrill said:

Seriously though, rule number 1 is: check the water temperature sensor. This is the usual thing, and is very easy to test.

I have "installed" a backup sensor which has been used a couple of times and has always proved the original sensor to be 100% OK. It seems the coolant temperature sensor gets a lot of bad press, is it just folk law or is there some truth to it? I find it hard to understand why a thermistor should be so unreliable.

[sparkypete]

where is the temp sensor located, the stepper motor was replaced last November,

[jmorgan]

Should have said I checked the stepper to make sure it was clean and not all sooted up.

[adam quantrill]

It's on the inlet manifold at the left hand front end, next to the thermotime switch.

leorest said:

It seems the coolant temperature sensor gets a lot of bad press, is it just folk law or is there some truth to it? I find it hard to understand why a thermistor should be so unreliable.

They do fail, but the main reason to check this early on is a) it's an easy test and b) it's a cheap fix.

[mightymouse]

My 350i Wedge suffered from this but was cured simply by adjusting the mixture by very nice MOT man - seems it was running too rich :thunmb:

No problems since (touch wood).

[350zwelgje]

adam quantrill said:

Seriously though, rule number 1 is: check the water temperature sensor. This is the usual thing, and is very easy to test.

Someday we should do a fault finding flowchart for the old V8....

Beginning of flowchart:
Flapper - check/replace coolant temperature sensor
Hotwire - check/clean stepper, if not ok see first flapper activity....

Think that ignition related stuff comes next very quickly.

In the mean time we find that pistonheads could use:
1. Spell checker (handy for us foreigners ;-)
2. Flowcharter?

Rob

[eesbad]

Rob - your English is better than my Flemish!!

[350zwelgje]

eesbad said:

Rob - your English is better than my Flemish!!

Don't know about that, so will take your word for it ;-)
By the way, I am Dutch but live in Belgium (work in Germany now as well!), and my Flemish is not so good!

Rob

[eesbad]

Hello mijn vriend! Uw Engels is goed!

[Wedg1e]

I was talking to a bunch of Dutch guys who were on a radiography course on Monday; they were switching quite easily between English and Dutch.
One of their guys took a swig from his drink bottle only to discover that some comedian had tried to superglue the lid closed. Instead he got superglue on his lips, fingers, clothes... he was ranting away in Dutch. One of the other guys interpreted it for me as 'He is very p155ed off'.
I asked him what the Dutch for 'p155ed off' would be and he said there is no exact equivalent but he came out with some other phrase that I forget... Dutch always sounds to me like 'hoder goder boder schmoder'

But I have met some great Dutch guys on my travels, they are always up for a party!

[sparkypete]

Thanks for all the replies, i have removed the stepper and that looked like what it is, new, i all so checked the throttle pot voltages and adjusted acordingly,

All theories greatly received.

Pete

[Barkychoc]

When checking the stepper motor, make sure you clean in the hole where it goes, that won't be new !!

Chris