Thread: Gas Injection just fitted to my 95 V8 Disco and its not running at all

Impco Technologies bought out BRC for its gas injection technology. So I assume the BRC adaptor would suit yours.

BRC has developed many different versions of this system over the years. When I attended an Impco seminar last year I was told there are quite a few differences between early and later systems.

However I would contact the seller and give him any details of your system and see if they are compatible, just in case. Also I think the diagnosis plug on your system should be compatible with the one shown in the link.

Try puting the old coil back in. Ive replaced a coil with a new "high proformance" one, just to have it run like crap. Put the old one back in and all was good.
Had the same thing happen with leads. Replaced them only because they were old. But when I test the new against the old factory Toyota ones, the old leads were still better.

Well its going in for a Dyno tune tomorrow with a gas place.Hopefully it
will sort the problem out.Instead of saving me money using gas its costing
me more . Will let you know how it goes.Fingers crossed!

Originally Posted by SPROVER

(. Will let you know how it goes.Fingers crossed!

so how did it go? or

Originally Posted by pibby

so how did it go? or

I completely forgot to update this thread.Ive really just been trying to forget about the whole thing.Well it went in for a tune up and they couldnt even get it to idle themselves.They guy who dealt with it said it was popping out the exhaust and said i either had a stuck valve or get this, to tight rocker shafts Never heard of that before!
So i really dont know where to go from here. Im thinking about taking the whole system out and going back to the old style set up.But thats going to cost me money and time which i dont have.He dyno tuned it on petrol and it made 101kw at the wheels.Which i think is about right for a healthy V8 Disco.
So i have a gas system in the car and cant use it. I just dont know what to do now!

well that's not good news. give it a couple of days and you'll be back at it trying to work out what it is. there's plenty of people on here who can point you in the right direction but the main thing they need is an accurate description of what is actually occurring. it's really important to describe if something is happening on petrol only/gas only or both. has the condition been deteriorating , is it when the car is hot or cold, is it just when accelerating or from idle right through the rev range, if driving on petrol at say 60 km/h then switch to gas does the car keep driving etc etc. you mention it was starting to hunt at idle on petrol is that still the case?

try and have a think again about your latest symptoms and update your thread with them and hopefully some bright spark will come along to get you on your way.

Well during the week i spoke to the guy who i bought the system off.He told me to bring it around and he would check it out for me.He fits these systems to Range Rovers and Discoveries.After 45 min of checking the wiring and having a look at how Deacon Automotive set it up he got the thing idling and driveable.I really couldnt believe it after the mechanic at Deacon told me "Its just bad luck it doesn't work on your car".
Anyway he had a look at a vacuum line which connects to a sensor i think which the computer gets a reading from and a few other things and asked if i was running an oxygen sensor on it.There wasnt one connected and he told me it should be to get it running correctly.So tomorrow im getting one fitted.He disconnected the vacuum line and what do you know the thing idled and drove perfectly.He explained it to me that there is nothing telling the computer how much gas to give the motor.And that with the vacuum off, it will be running full rich on the gas.Does this sound right?
I drove home about 20 km and it drove perfectly.The only thing i noticed this morning when the engine wasnt at operating temp it didnt want to run right and was spluttering alot.Probably due to running full rich???? Hes going to be tuning it for me as well once the oxygen sensor is fitted.So hopefully after all that it was just something simple.

Originally Posted by SPROVER

Well during the week i spoke to the guy who i bought the system off.He told me to bring it around and he would check it out for me.He fits these systems to Range Rovers and Discoveries.After 45 min of checking the wiring and having a look at how Deacon Automotive set it up he got the thing idling and driveable.I really couldnt believe it after the mechanic at Deacon told me "Its just bad luck it doesn't work on your car".
Anyway he had a look at a vacuum line which connects to a sensor i think which the computer gets a reading from and a few other things and asked if i was running an oxygen sensor on it.There wasnt one connected and he told me it should be to get it running correctly.So tomorrow im getting one fitted.He disconnected the vacuum line and what do you know the thing idled and drove perfectly.He explained it to me that there is nothing telling the computer how much gas to give the motor.And that with the vacuum off, it will be running full rich on the gas.Does this sound right?
I drove home about 20 km and it drove perfectly.The only thing i noticed this morning when the engine wasnt at operating temp it didnt want to run right and was spluttering alot.Probably due to running full rich???? Hes going to be tuning it for me as well once the oxygen sensor is fitted.So hopefully after all that it was just something simple.

Remember the gas ECU is reading the petrol signals, so probably it is way too rich when running cold petrol settings. Should be better if the petrol ECU gets oxy sensor input but I don't know if that's what your guy is recommending. The removed vac hose is just upping the load signal to the gas ECU, it's a work-around which should be fixed with retuning.