jamie956

I've just tried starting my car for the first time after building it, and ive got no spark.

Engine and Ecu has been run on dyno but since then a MSD wasted spark kit has been fitted, loom was from a running car so assume that's good.

Pumps prime when ing switched on and run during cranking so that side of things seams good.

Not sure where to start looking or what for, checked the power to the coil pack and only have 12v at one of the terminals the centre one I think.

Where else should I be checking for voltage.

I have changed the plug leads for a set from matt lewis and they where difficult to get in to the coil pack I do have the original MSD leads so might swap these out tomorrow.

Any help will be much appreciated.

jamie

gingerturbo

iTrader: (2)

Crank sensor issue ?

gingerturbo

iTrader: (2)

Earth?

jamie956

Brand new sensor and run on the car during dyno, how would you check it?

gingerturbo

iTrader: (2)

The air gap should be between 0.6-1.0mm, it should have a 12v feed and an earth, when disconnected it should have a resistance of about 800ohms, and when cranking you should see a Hall effect (square wave) or pulsing if you use a test light

jamie956

Ok will start with checking that, anything else you would think of looking at.

Thanks for the help.

Jay,

iTrader: (4)

The phase sensor needs to be spot on to

jamie956

Same sensor as run on dyno so should be good, I did have to alter the loom as it was previously set up to run cam position sensor.

I had to lengthen the wire and also swapped the pins round,

Any way of checking it?

Jay,

iTrader: (4)

MMM If the phase is wired incorrectly that could cause the issue or jusr not working

off the top of my head i cant remember the wiring but look at www.bigturbo.co.uk

gingerturbo

iTrader: (2)

It could be as simple as having the signal and earth the wrong way around? I'd double check wiring that you had to modify

jamie956

I will double check it tomorrow I have a old original loom and used that to pin out the plug, Big turbo diagram just shows what pins in the ecu plug thing are connected to not the plug end.

martysmartie

iTrader: (1)

There is no power supply, moreover the fact the pump primes eliminates the CPS!

The most likely problem is WS.

You have the correct supply, but it's almost certain the ECU is not switching the ground, so I would start by verifying your installation...

Martin

boy-racer-1

Chuck the ws out and there's a 90% chance your car will work

jamie956

Right checked the phase wiring and that's correct pins 5 and 23, plug end as per original old loom.

Checked the voltage at the cps and phase and only have 0.5v with ing on.

jamie

delbee1

What ignition amps are you using??

jamie956

2x new as supplied with the kit/msd.

delbee1

Are they webber ones or ones from MSD as my webber one didnt work with the wasted spark?

Also is it a MSD wasted spark loom and how is that wired??

I think I have a picture of how that should look too....

delbee1

Also did you cut the supressor out of the loom and join the wires??

martysmartie

iTrader: (1)

Like I say, there is no supply to the CPS.

Martin

jamie956

any ideas what could cause this or where to start looking?

jamie

martysmartie

iTrader: (1)

The CPS is fine!

As I say, the problem most likely is the WS installation.

Therefore go over it again making sure you have not missed anything, from what you are saying I assume it's a DIY install, did you install the driver as well?

Martin

jamie956

Well I have a custom engine loom for WS so that's just plug in apart from changing over from cam position to phase and had to add Amel valve connection, and I had an electronics engineer fit the driver board ive opened up the ecu and checked the connections to the ecu pins (listed above) but need a copy of instructions to check the connections on the underside of the board.

Ive put the meter around a few plugs to see what I have,

CPS 0.5v
phase 0.53v
TPS 4.97v&4.99v
ISCV 0.47v & 0.16v

Coil 12v on centre pin

Ing amps 12v & 4.5v same on both plugs.

Fuel pumps prime and amel valve clicks when ing turned on.

jamie956

any one else got any ideas

boy-racer-1

Google wasted spark problems or something along those lines otherwise you might aswel carry on pissing in the wind

jamie956

Very helpful thanks,

martysmartie

iTrader: (1)

The ECU is not switching the coil for whatever reason, you need to verify the installation, for example the driver may not have been installed correctly, also have you connected the two wires to the ECU connector?

Martin

jamie956

Un sure of what two wires you are referring too the engine loom was made for WS or am I missing something.

martysmartie

iTrader: (1)

There are two wires you have to connect to the ECU, are you referring to the WS loom or do you mean you have had a new engine loom made?

Martin

jamie956

Update finally got a set of instructions and turns out one of the wires on the board side of the ecu was on the wrong pin no;12 instead of 13.

Changed it over and now have a spark but still wont start, I have a spark on all 4 plugs during cranking but only 2-3 when ing turned on. Not sure if this is right or not.

Ive swapped everything round and tried another coil and its the same.

Now seams like im getting no fuel have fuel at the rail, but plugs stay dry dose a little cough every time you turn ing off then try to start not sure if the injectors fire when ing is turned on and that's what doing the little cough.

gingerturbo

iTrader: (2)

Is the pump priming? As you may find where you have bin messing about with it the inertia switch has kicked in for the fuel cut off, also check fuses as if the wires were wrong it may have bin sending a current the wrong way down the loom

martysmartie

iTrader: (1)

The supply is ok as he it's present at the rail, just not reaching the engine, which means the injectors are not opening.

First check they have power, most likely they have, then move onto look at the phase input.

Martin

martysmartie

iTrader: (1)

I know, but this was for the first problem, with no ignition, it will not effect that, that is how I knew it would be down to the WS installation.

He has multiple issues, in actual fact a phase sensor will only stop a 2WD managed car from running, the way I understand it. The later ECU's can perform a calculation to substitute a value in it's absence.

Martin