V8S coolant & fuel temp sensors

[Scoobimax]

Calling V8 guru's.

I have a heat related problem where engine runs fine when cold but feels like a "limiter" kicks in when hot, with no power and coughs/splutters starting from about 3k revs gradually getting worse and kicks in at to 2k revs and eventually stops running altogether.

Reading on SD1, MG RV8 & Range Rover forums, could be either fuel/coolant temp sensor issue - erroneous cross connection as they're close(ish) and same connectors or failed sensors.

Don't think they're cross connected (in error) so possible faulty sensors.

My questions are

a) do the above symptoms sound right to diagnosis;

b) are these the sensors in the following pics:

Fuel sensor?


Coolant sensor?



Got to get this sorted for EuroTour or I will be at the back in the Alpina generally having the pi$$ ripped out of me.

Any help/suggestions/confirmation welcome - would like to go to the motor factors for new ones to fix/eliminate from the issue.

Are they identical sensors so just buy 2 x the same sensor?

Thanks in advance.

Max

[Scoobimax]

v8s4me said:

I have spares of each which will be in my boot on Wednesday if you need to borrow one.

Thanks Joe - if I can't get it fixed by Tuesday night, it won't be coming and we'll be in the Alpina - can't risk setting off in this state.

But see you weds afternoon/evening in Folkestone/Calais :-)

[Scoobimax]

PompeyTim said:

Yep, they're the fuel & water temp sensors.

From what I understand, failure of these is more likely to lead to poor running (too lean / rich) rather than cutting out all together. Some useful info here:

http://www.actproducts.co.uk/2011/lucas-14cux-fuel...

Another possibility is the ignition amplifier on the side of the dizzy... worth checking to see if you still have a strong spark when hot.

If you do make it in the S I'll have RoverGauge with me so can hook it up & give it a good going over.

Cheers Tim - swapped that today along with new coil, dizzy cap & rotor arm but symptoms persist. Probably heading to a V8 specialist first thing in the morning. Luckily I'm off now so have 2 days to fix otherwise I won't be in it foe EuroTour - fiesta or Alpina will be used (oh the ridicule I'll get on tour)

[Scoobimax]

tel595 said:

Any chance of a faulty ecu plug/socket connection.?

Very possibly but all looked (visually) ok but beyond me. V8 specialist in the morning me thinks now - found one close by (couple of miles) 2 days off work helps

And re the first half of your post - may well be the chase vehicle

[Scoobimax]

All resolved now thanks to RT Racing - turned out to be a failing fuel pump (despite being new). Seemed to be full of crap already so replaced, along with new fuel pipe that included a pre-filter.

Appears the consistent heat aspect was a red herring - to be fair it was running horribly this morning from cold so probably fuel pump was deteriorating rapidly.

Thanks for the help and suggests.

Max