hi people, ok i think im narrowing my problem down i have an ecos which wont start, ive found out there is no earth in my injectors so i swaped the ecu put my old one back on now injector no2 is rattling like mad done a power check on no2 inject and there showing 12v this is the only injector working, could this be my ecu? cheers hugh

 

the engine wiring harness plugs can corrode, maybe unplug and check those!?

 

hi mate, i have them bypassed done it one by one so didn't get the wires mixed up, just thought it was strange when no2 injector is working now on the old ecu and not on the new ecu i bought? hugh

 

You will not be able to check for an earth at the injectors. There should be 12v with the ignition on. The earth is done at the ecu. Check the wires from injector to the ecu is ok and all the ecu earths are good. There are a few of them, don't know the pin numbers though.

 

Sounds like a chip/ecu problem.

Is the chip/ECU a known quantity - i.e have you just bought it or has it been running on the car before?

 

the injectors will only have a -ve when the ECU is firing them.. so it will be switched off when the car is off. and switching like mad when the car is on/cranking.

 

hi will, the l8 on the car had a stage 1 chip when i bought it some time back i bought a stage3 setup of somebody on here that was working fine untill the car was in a smash nearly 2 years ago only the sensor got broke in the smash i thought it might of been the problem so i bought another l8 green label one but no injectors im sorta putting it down to ecu aswel now tried nearly everything else? cheers hugh ps.. are you still working for Stu Will?

 

maybe if i just buy after market ecu and loom.. anyone know what sorta money they are? hugh

 

its not my old secs s8 ecu is it?

 

i paid £550 for a DTA S40 ecu off tony, nuts r us off here.

it does a coil and injector test, mine all work ok!

 

hi, no its not your s8 ecu..did you get a loom with that aswel mate? who mapped it for you? cheers hugh

 

Has the loom been messed about with ?
I have seen it once, where a numpty when taping up a loom mixed up the no2 injector connector with the iscv connector, and these were transposed, as they are exactly the same length from inside the loom insulation.
Net result was fuel actually pissing out of the join between turbo and trousers, and running on three, easy fix after I found it.
I thought naturally this was a ecu fault, but the penny dropped when asking owner.
No names though!!
tabetha

 

hi again lol, no it is in good enough shape by looking at it but ya never know i have a pectel loom for a 2wd car maybe i should try an fit that but there no plug for knock sensor? hugh

 

Hughy - i'm still working for Stu part time these days pal

Personally, if you can, i'd try and borrow an ECU & Chip complete out of a friends car and substitute it for yours.

If that works, then whip the lids off and try swapping your chip into their ECU and test again.

Chattering of injector 2 is quite common on corrupt chips, obviously it's not the only cause, but may help you trace the fault to ECU, chip, daughterboard, loom etc. and make the repair cheaper and easier!

 

thanks Will, ah not so bad it pays the bills lol, yea might try an get another ecu cosworths are not easy come on where i live but i know a few people ill get in touch with, i have a pectel loom i was gona fit but just noticed now there's no knock sensor on it do i need that sensor on it Will? cheers hugh

 

If you have a P8 or L8 then I would personally always recommend you run a knock sensor as it will give you a safety net. Some tuners chips run very close to the point of det and rely on the knock sensor to make sure it never causes any damage. It shouldn't be a big job to have the loom modified to accomodate a knock sensor!

Offer someone a drink and i'm sure they'll help you out A lot cheaper than buying new ECUs, board, chips etc.

 

ok thanks Will, will look into having this loom modified, but could i even use it JUST to see if the car starts? hugh

 

£20 for a loom plug, or £65 for a pre wired one, that you will have to then fit your own injector plugs etc to.

i had one of ryans looms, that i ended up modding to fit. was easy enough to do tho, but the pins for the ecu plug had to be exact or they wouldnt push in the connector.

not had it mapped yet, but it has self tests and the coils fire and the injectors fire as i have done that lol

 

can i have your loom and ecu lol, gona see if i can get another ecu to try, and change the loom it has to be one of theses 2, wont get anything else done till car til next weekend what a balls thats working away from home for ya, cheeRS hugh

 

Yes, will start and run the car without the knock sensor no problem. But i'd recommend you install one prior to using the car hard!

 

thanks Will, i def wont be driving it without thats for sure, cheers hugh

 

will,

whats the story will knock sensors.what do they read from,didnt know you could have one on the yb

rob v