Reet then, is there a way of calibrating the tacho, it reads 500 rpm more than conzult, i know there is potentiometers on the back of the dial mech...

 

I have a slight what feels like a missfire, but cant be sure, seems before it boosts, when you put a bit of a load on it at low revs, it's feels a little bit like it's running on 5, but running on them EXTREMELY well, if that makes sense, but then boost and smooth as silk, as is the tick over, i could be imagining it, could just be because it's a V, but i do get the odd obvious missfire, and strangely, everytime i check the plugs, seem to find a cracked one, and i know for a fact i'm not breaking any fitting them or removing them, bit weird...

 

I have a pare set of coil packs, but it's not road legal yet, so can't test drive it much, could just change the 4 easy coilpacks and hope for the best, but would rather find the specific problem...

 

No error codes and boosts a treat, apart from once, only seemed to get 9 psi, normally 14, but that was only a foot down 2nd gear few seconds of a job...

 

I do have a spare series 1 PTU, but can't be sure that is healthy as i bought a replacement to cure a different missfire, which turned out to be the loom, and it now has a full brand new EFI loom...

 

It does have a mines ECU, and was overfuelling lots due to both knackered O2 sensors, which have been replaced for second hand ones, which appear to be working fine on conzult, could the ECU be a factor? And I am only running it on normal fuel, a gallon at a time just for testing purposes...

 

Also have replaced a couple of injectors that were faulty, new PCVs, 95% of hoses/pipes are new, recon turbos, and engine rebuild, re-bore, boost leak test seems fine, but seem to get a bit of a hiss of leaking air from inside the brake servo, is that normal? It works fine, doesn't seem to loose any pressure on the pedal, start the car and it goes down nice and bonny, engine off, then solid. Got good vacuum, but if that was leaking, would it cause this problem?

 

Any thoughts guys? I think i have been pretty thorough, but if anything will help diagnose just ask us...

 

Thanks in advance for even reading this essay! Tudor...

If you have a series II PTU then I'd just trust it and leave it there. By all means swap the Series I in/out, but only change one thing at a time.

 

Coilpack wise, just change one at a time. If there is no change with the first one then it must have been good, so leave the new one in and use that one to swap around the other 5 - one at a time.

 

For the tacho - twiddle the screw and see what happens ! Can't remember but is that the one where you need to drill a little hole in the casing in order to adjust it in-situ ?