The V8 Owners Forum -

Not yet, I have had an enormous amount of help from GDCobra which I am really thankful for. Currently looking at fuel supply making sure that fuel pressure whilst driving is adequate. Not been able to complete the tasks I want to get done on this due to awful weather. There are a couple of interesti...

I was logging short term trims on the Lambdas, assuming the logs follow what you have selected on the screen of RG. This thread is quite long now so just thought I would do a brief recap on the engine in case this has any bearing on whats happening. The two main differences from normal are the cylin...

Thanks for your detailed response, I will set the logging to what you suggest. I am on a steep learning curve with this and was also confused by the road speed. The software has a multiplier I discovered and worked it out that I need to set a value of around 3.7 as I was mostly doing around 60 mph o...

Grounding can be very important for your sensors - not just for shielding: I know you don't have megasquirt ECU - but this is interesting on the theory for grounding: helped me solve some weird issues I was getting. https://www.msextra.com/doc/pdf/html/MS2V30_Hardware-3.4.pdf/MS2V30_Hardware-3.4-12...

Just on a slightly different topic but shows just how frustrating this all is in relation to what RPI supplied. Whilst watching videos on Rovergauge I came across a mention of a grounding plug for the diagnostics port which is there to prevent ECU interference. I had no idea this was supposed to be ...

Thanks for your help David I have sent the logs over. I am trying to see if there are any patterns in the logs the only thing I have spotted up to now is with the throttle closed all trimming immediately stops, is the triple throttle body overwhelming the capacity of the 14CUX to handle the volume o...

So with everything back together I was able to go for a run today. I did about 25 miles without any sign of a missfire so hopefully it was that loose earth. The engine idles better, dont think there is any difference in power but didnt push it today. Also seems to be running cooler. With a new lapto...

No Problem, very glad for your help. Yes I did pay a frightening amount of money for what was supposed to be a 'Plug and Play' engine requiring only basic electrics, fuel, cooling and timing etc. I did a lot of research into RPI and at the time saw mixed reviews. My decision to use them was the plug...

I will hold off on the new plugs for the time being. I dont know what the C stands for either but in an EFI engine they should at least be resistor type plugs. When I bought the BCP6RES I think I still tried to believe RPI knew what they where doing installing BCP6ES but in truth I have since realis...

Thanks Ian, Unwrapping the loom both Lambda sensors earth through the point I have found so that isnt going to help. The car came originally fitted with BCP6ES supplied by RPI which isnt correct (non resistive) so I fitted BCP6RES these where ok originally but started turning white when I started ex...

Is it perhaps something simple as a bad earth/ground connection You could be right! I decided to strip out the engine loom as I have never been happy with what RPI supplied. During removal I found a group of earths tucked down out of sight at the back of the block which I have never noticed before....

This is a similar ACT Plenum set up and you can see the 'T' for the connection to the plenum, in another picture I can see the EFI style air intake filter - Makes me wonder if it was just too much work for RPI to add the T, it is quite tight space wise

Question about Crankcase breathing. I have always been puzzled as to why RPI blocked off the rocker cover air intake filter with a blob of silicon - 20251009_155717.jpg On the passenger side there is an outlet that feeds directly into the atmospheric side of the throttle butterfly from the rocker co...

Thank you so much. The white plugs are a recent issue, having checked for air leaks and changed lambda's, idle control valve, ECU water temperature sensor, fuel pressure regulator (it was the regulator in my instance as soon as it was replaced the system held pressure whereas it wasnt before), fuel ...

Thanks for your help and taking so much time with your response it is appreciated. The MAF is a bosch unit and comes with the remote CO trimmer replacing the standard in-housing trimmer. I have this set currently at the 1.5v recommended for a non-cat car but have tried other settings with no obvious...