HirenRS

Hi peeps,

so ill start with spec;

2.0 silver top zetec
1.5mm de-comp plate
Arp bolt kit bottom end
stock rods, pistons, cams, valves.
FRST inlet manifold
Beige injectors
Escort T3 Turbo
CVH box Quaife diff
Having reshelled my unfinished xr2i. ZT which i had on OFAB until fitting it out with a emerald M3d ECU and never got round to mapping it , i stuck it all into a diesel 3.5 shell, inc fuel tank, petrol lines etc etc basically a straight swap, anyway i finished the car up and have had it on the dyno twice now and i does the same thing nonmatter whay i try or my mapper does, he is using a good setup and knows his way around the software, anyway as soon as any load is put on the engine ingetbanerratic misfire, if the car isbcruised calmly off boost and not applyinf any load it seems to eventually get up the rev scale, when floored the exhaust note clearly sounds flat i know what its supposed tonsound lkke but it seems that there is a possinle ihnition fault or something else causing this so;

changed leads,
plugs and gapped various times
tps sensor
fuel press regulator
coil pack
cps wiring is all shielded from emerald injectors have also been flow tested cleaned and checked at work, alsonseems tonbog out as im trying to take off have to get the revsnup before mooving .


anyone got any advice, emerald maps for similair spec, any help will be hihhly appreciated!!

luke19790_3

Have you changed the valve springs?

HirenRS

havent checked the valve springs id have to strip cams out to get anywhere near them, seems a bit drastic right now, however i have conected my coil directly to tue battery and the car seems to run better especially under load however it is very hard to start, could it possibly have been a weak ignition circuit and a map which made it semi driveable, under load it is still hesitant but i assume it needs to be set up again as its possibly overfuelling? i thought to keep the engine running on a weak dpatk he possibly may have had to increase fuel delivery

studabear

How much boost are you trying to run?

HirenRS

at the moment 0.3 bar nothing at all

HirenRS

my current problem is figuring out how improving the spark stregnth could effect the map especially starting, anuone got a emerald zt?

studabear

Have you checked the compression on the engine to make sure its healthy?

HirenRS

ill br doing one tomo i am however very confident thr engine is in good order as it a recently built motor only covered a 100 miles on ofab before converting ps; im not using edis ecu delivers dpark signal

HirenRS

quick update and question

removed coil pack and it looked very dirty under theire the coilnpack bracket had also been painted, i assume the original coil pack earths itself aginst the coil pack bracket so anyway scotched it all clean and dry both coil pack and bracket to ensure a good earth if it is does earth against the bracket that is, anyway with the 12v+ running directly across bay to the battery the car starts on the key and seems to drive better, when floored theire does seem to still be a misfire, i think its safe to say i have a power related issue, the car charges fine and battery is in good order, i have noticed a third connection on my alternator which is currently not used, should this be routed to the battery to increase voltage?

b11lkw

I have exactly the same problem on my ZT, so any news on this would be great, mine misfires if I plant the pedal and comes under load quickly, if I feather it in it seems ok, over fuelling could be due to a sensor down, I haven't had a chance to hook up to a monitor yet to check, I have replaced all boost hoses I case of collapsing under pressure but no avail.
Mine is running weber and has been mapped but these issues have only reared up recently

xr3iturbo

do a nice throttle run ...take out plugs and post up pics .


I would say you are possibly running lean or to much advance ...plug gaps wrong ?


There realy are to many varibles But plugs can tell a lot


Tommy

xr3iturbo

Coil pack dose not need an earth as you supply a switched live to middle pin and the ecu pulses -ve on the 2 banks of coil to tell what cylinder to fire



Tommy

studabear

Bill will your monitor show afr?

b11lkw

I don't have my monitor at mo, turns out the welds on the inlet had let go! Even so it still doesn't run well at all!

HirenRS

okay bill ill be in touch working to figure this issue out i seem to get a extremely black plug come out of cylinders 1 so ill be checking in a beware set of injectors, apart from that try connect middle coilpack wire to battery + to eliminate bad signal

HirenRS

btw ive trid using Duratec i4 plugs 2.0 turbo same thread length and also a tapered plug, focus rs uses a crimp washer iirc ive tried gaps from .6 to 1.mm no lack as of yet trying a set of pltr6a-10s tomo



also what monitor are you using? i have a visual display of lean lambda and rich measured using bars in incremebts of ten so 30 bars all together if you get me anyway, im using. narrowband in the downpipe and as soon as the misfire like problem appears the laptop shows lean! im going to try a new set of plugs tomorow can anyone confirm if the focus rs plug is washered or not, bill whats your spec id suspect if your iblrt is leaking it could cause this fault aswell as general bad running

studabear

No washer on frs plugs.

b11lkw

I use denso iridium itv27's as standard FRS plugs can't cope, found out yesterday my inlet had a couple of holes in where the welds have failed! therefore it's Deffo been running lean, I use a Collins monitor but don't have it at mo, did hook up to a monitor over the weekend, all sensors are fine, drilled out the failed welds and drilled and tapped blanking plugs as a temp measure but I'm still having problems!

HirenRS

okay ive gone to using a set of temp range 6 plugs iridium nkg i think part no is pltr6-10.....anygood? chdck your plug gaps what managemebt you on?

b11lkw

Think I'm gonna check the plugs again, they were gapped before they went in but if it's been running lean then might need a clean up or replacing, it's running webber P8, greys and 2bar boost!

luke19790_3

Standard frs plug are ok unless you're running big power

b11lkw

Well I replaced the plugs, the ones that have not long been in are black!! I have checked sensor gaps, tightened up anything that seemed to need it, adjusted the idle screw and I'm still getting problems, once the engine is warm, just driving off boost, on e I back off the throttle I'm still getting backfiring and the engine wants to stall!



Any ideas?

t230

mine turned out to be wastegate on turbo being flimsy - ok i have misfire now but i know its because of my inlet leaking - check ur wstegate on turbo and check actuator is not stiff....i changed all sensors..was doing same thing till i bought new turbo but then realised the diff in actuators and wastegates between new and old ....old wastegate was flimsy and rattling

im sure u havent mentioned wat controls your boost?

studabear

Has it always done it on the current map? black plugs is over fueling??

b11lkw

It was running perfect when mapped, this started a few weeks later,
Air injectors control the boost.
Could check the turbo and actuator I spose, that's a ball ache tho!

Gettin close to givin up on it now!

studabear

has Jano had a look at it?

b11lkw

Yeah last week, put the monitor on, all sensors fine, put it down to the hole in the inlet so we temp fixed that, must be another underlying problem somewhere

b11lkw

So what was the outcome in the end? Has it been sorted?