Took my 2wd saff in for a rolling road set up the other day the next day
started it, it ran fine on choke at idle then died, tried restarting but
it keeps over fueling!!! I changed all the sensors apart from mapp 1 month ago, today i changed the phase module which the wires had bared on (does any 1 know gap between module and lugs) put original chip in ecu but still overfueling to the point piston 4 is locking under compresion.
Its also got irratic spark could this be ignition module?
any help would be much appreciated
cheers tony

 

0.2-0.3 mm get that right first as if not gapped right will over fuel

 

all ready got it at 0.2mm sittining straight and snug so not that

 

If a cylinder is locking under compression you have MAJOR trouble, as this indicates major engine trouble mechanically speaking.
It is 99.99% certain this is NOT happening, if it is NOW overfuelling what was it like before ie immediately after the RR session ?
Did it do any very rapid HARSH CLICKING before it died ?, and what makes you think it is overfuelling ?, they are VERY rich when cold, may just need some fuel taken out of the(cold start) fuel table.
Other info needed ie mods etc.
tabetha

 

after rolling road the car would start on 3 and clear run fine but hunt on the way down from revs!!!
when it died there was one click but when trying to restart i could hear it arking out which i think was the phase module
i think it is over fuelin because i've taken the plugs out and piston 4 has the low comp dip full up which i soaked up and im 99% sure is just petrol
when i was at rolling road the guy asked to try a customers ecu in my car as hes car WOULD NOT START!!! could he of changed it??
The car is running greens (803's) t34, 500 intercooler, a very newly recon head which was @137.9mm and matched 49.9cc, 3 peice cometic gasket
200 block and came off the rolling road at 332.3 bhp

the biggest prob i've got is the irratic spark some times one plug will spark 3 times quickly then no spark at all so i guess pre ignition could make it lock or not??

 

forgot to mention turnt over by hand and with plugs out and does not lock

 

You will not hear any phase sensor "arcing out".
It is only normally a 5 volt refference signal, so even if shorted you would not hear it.
The rolling road does not exactly inspire one with confidence, if he lets a car go as fit that starts on 3 and hunts on run down!!
It defo sounds like it is chronically rich, but you would never in a million years get enough fuel/liquid in the chamber to lock it hydraulically at cranking speed.
It is possible you have some damage in the coil driver of the ecu.
If this is the case it could certainly cause timing scatter or any number of problems.
Make sure there are no marks in the dizzy cap from cross firing, or tracking marks, as these serve to scatter the timing.
In the long run it would be best to see if you could borrow a ecu as this would certainly elimnate this as a cause or not.
It can be a std/stage1/stage 3 or whatever as you only need it to confirm spark, it will do your car and the ecu no harm, so long as phase wires are intact.
tabetha

 

going to go through everything 1 bit at a time using autodata as a ref.
or is autodata not the best?
thanks for your responses all help much appreciated as its starting to get me down spent alot of money doing things properly but still cant have fun!!!!

 

What RR did you use ?

Can you not get them to look at it as it wasn't running right when you left them ?

Steve.

 

That was my first thought but then can you trust them if with a rolling road they can't tell you whats wrong!!!
tabetha

 

just got in from spending the afternoon back under the bonnet went right back to basics and noticed that the rotor arm was way out when everything was at TDC nearly 1/4 turn out how could this happen any1 heard of a dizzy slipping or seazing???
still got something breaking down tho as it coughs every so often and is still hunting on the way down from revs could this be that it is running rich at idle.
sorry im asking so many Q's but i'm a newbe.

paul hills at engine advantages witham was the rr nice bloke but think i'll do it my self from now on!!!! he changed the ecu chip with out telling me when all i wanted was a set up is that common practice????

 

Changed the chip without you knowing thats NOT good practice!!!

And why did he try ecu on another car? thats strange

Is yours a 2wd or 4x4??and is it your ecu in the car now??

Paul

 

I find that amazing from him, defo go back or at least phone him up.
Paul would not change a chip without asking unless it was for diagnostic work, or the customer was not there.
If the arm was 1/4 turn out, I cannot see how it would run, unless the leads were also out by one space, then it would just mean the phase was out, but spark was ok timing wise.
tabetha

 

can't understand whats happen with dizzy either but i had to loosen timeing belt and turn dizzy wheel to bring the rotor arm back to tdc which means pointer on wheel is off tdc marker
as for the chip i didn't know he had changed it untill the next day when i rang him for some support as it wouldn't start then had to go and pick original chip up from his letterbox!!!
as for being my ecu i don't know if it is or not i remember the clip that holds plug in being missing but no there is 1 maybe he pop rivited 1 back on?!?
but set up and remap inc new chip for Ł150???????????

car is 2wd L6

 

sounds they have done something to your that went tits up and they have tried to cover it up

 

The pointer is off only because someone has put it back in a different postion to ford that's all, ie the pulley was turned when the dizzy was out, it makes no difference at all so long as timing is on this mark can be ignored.
Something is wrong here, Paul charges Ł100 = vat for chips.
I am using a EA chip, and have had it on a RR since this was fitted, it is performing perfectly.
I had mine on another rollers for some testing of components, and all was spot on.
I am horrified to hear this, as it is not the impression I got when there.
If you can get a borrow of another ecu, even a std one to try on yours, just take it easy when you try and it will be fine.
tabetha

 

Sounds like your original ecu has gone prob replaced with a lower spec one ie L1 instead of L6 whos knows

You have been fiddled imo on the info you have given us m8

Paul

 

isnt 137.99mm too low for the head to still be used?

 

Yes and no ok for low comp pistons but no good for porting imo

Paul

 

That thickness would be fine so long as they de chambered a bit.
tabetha

 

Need we say more

Steve.

 

I am well annoyed at this, as I know from first hand experience he is capable of doing a first class job, but am going Emerald in January so does not affect me anymore, might be a good thing but he has always done mine perfectly, confused am I!!
tabetha

 

I'd be straight on the phone asking why he changed chip & swapped ecu over without your knowledge.......as for rivetting the clip back on...I dont think so..does it look like a new rivet? is it shiny clean new? probably not.

Ring him, tell him you are unhappy that he changed the chip & ecu over without you knowing and that you want your old components back so you can get it set up somewhere more professional.

Dan