The V8 Owners Forum -

Hi again, another RV8 thread! After getting the new throttle pot for my Disco it's running pretty well, it's still pretty rich though. The plugs are sooty black but not wet. Anyways, it the moment I'm getting 13mpg 3/4 motorway, 1/4 town driving. To start with I want to get to the 16mpg claimed aver...

Well it now runs absolutely sweet as a nut, it's used a fair bit fuel tonight though we've done a lot of off-road work, around 100 miles to a quarter and a wee bit of the tank. At first it wouldn't idle very well, it had to be "coaxed" until it caught up otherwise would stall, not it must ...

Well she lives again! I managed to track down a replacement pot (no mean feat on a Saturday round this way!) and although it had an earlier connector I managed to improvise :D. The old one must have been breaking down inside but still working occasionally. I'll get another one during the week so it ...

That ball park sounds familiar from when we took it out the hot engine then into a tub of cold water. I've not done the new one yet. Another thing I've found though, the throttle POT, which was tested before and seemed fine now has mysteriously stopped working, there's 5v going in(?!?) but no change...

Cool, I'll sniff around there tomorrow. I doubt it's something like paper as I've had a good bit of the inlet off as part of my "leak" check. I wouldn't be surprised if it did turn out to be something silly though. Cheers for the link, I've started to read through. Maybe with my new job I'...

By pressure relief valve, is that what I'd call the fuel pressure reg at the back of the fuel rail? Would this be giving me my symptoms, IE starts and drives fine for a small while then goes into limp mode maybe as the pressure builds up too much? Any info on your '40? Looks and sounds quite interes...

Well the earths seem good and changing the CTS has made no difference. It drives fine for the first 1/4 mile whether hot or cold then it goes back into limp. If you turn it off it'll be fine again when you start it again. I've also just limped off to a local garage I deal with who plugged their 2 te...

Hi Randall, all the plugs are black. I'll check all the earth straps, though I do still feel it's something temperature related with it running fine for the first few minutes, would I be right in thinking that it'd be unlikely to be the fuel temp sensor? From what I've read it's main purpose is with...

Update for tonight, the idle was much better but we've still got limp mode, though for the first wee while it drives fine, then it stops being fine! Therefore it's something temperature related IMO. I've a CTS coming tomorrow which I hope will work, though I do have my doubts TBH, the resistance did...

Well, I've just fitted a new MAF sensor, a quick run showed it's still in limp mode though the idle is better. I've disconnected the battery in the hope it'll reset any faults then I'll try again.

Unfortunately the hand book is missing, there is a battery light and oil light, both go out as normal!

I'll head over there after work tonight

It was trade seller, as for the engine lights I was led to believe only the diesels used them, though I was also told that there was no limp mode on the engines which it would appear there is!

The coolant temp seems to change well, I couldn't give an accurate reading on it because I don't have a thermometer! The MAF I'm unsure of, it's giving a reading of 300 ohms when I take it off and is is affecting the running off the car. That's about as much as I can tell! I might just try and find ...

The TPS would appear fine, when the throttle is closed it's 0 ohms then increases to around 4k ohms when open, I've read that could be about right. I tried disconnecting the MAF meter, it ran a little worse and when revved up it was much worse! It's still using ridiculous amounts of fuel. Something ...

Cheers, we've done this a few times today, it hasn't helped unfortunately. Any ideas as to what sensors to check?