Hi All,

I am having a problem getting my 24V Cosworth engine started on Emerald K6 management and hoping someone can help me before I do my nut in.The Ecu seams to be doing everything is suppose too apart from starting the engine.

When the engine is cranking over I am getting a lot of banging, popping, engine lock and backfiring which is making me think is a massive timing misalignment within the base map??.

I think the problem is in the timing settings, although this is Emeralds base map. The BTDC (before top dead centre) reference point is set at 65 degs, which in my opinion is massive and I though these engine using the standard Crank Position Sensor ran somewhere between 12.5 & 22 degs BTDC.

Has anyone had a similar problem to this or has anyone got any other suggestions where I am going wrong?

 

Is that a base map setup for a 4 or 6 cylinder, as yeh this does sound like its firing at the wrong time

 

hi

Yes the MAP is set up as a 6 cylinder, the only thing I can see that looks out of place is the BTDC setting, just seams massive to me

 

You need to get the crank sensor set correctly otherwise it could be to far retarded or advanced ! It is most important the crank angle is correct

 

the crank sensors is currently fitted up as standard, I might try as time it old school with a timing light

 

Yeh you need to work out the correct angle BTDC as all cars are different depending on the crank pickup

 

The angle needs to be correct so yes use a timing light and adjust the angle in the software until you get the correct reading on the gun

 

ill give that ago and see what happens, I just assumed, rightly or wrongly, that base map supplier would be correct and ready to go

 

Out of interest the engine was running on ford management before right?

What test gear have you got as you can use an amp clamp, or spark test leads and noid lights to see if there out of sync

 

The engine is a fully rebuild engine so its only ever ran on the dyno and all was ok

I have all test gear above and a timing light. so I think I need to do some more investigation with the Noid lights and timing light to see if everything is set up, any idea on BTDC degs of a 24V cosworth

 

Ill dig through my folders as I'm doing the same for my safe

 

Thanks mate much appreciated

 

Are you using a trigger wheel or the standard for cps

 

It's just the standad crank pulley and CPS

 

For some reason I've wrote between 14-18degrees BTDC but I've got a feeling that's using the ford EDIS?

 

Is the OE pulley a 36-1 pulley

 

I don't think it will matter if I am honest the emerald acts on the same manner , or so I have been told. I'll give it ago and see what happens, it has to be a timing issue and the whole ignition map is based on the btdc deg ref , so if that is wrong the whole timing will be adrift. Doing my head in

 

Going through my bits a 6 cylinder should be 60deg BTDC so you may need to do a few more tests

 

Yes the pulley is OE pulley running the standard 36-1 configuration

 

It's a pain in the arse sometimes

 

Tell me about it

 

Set it for 60degrees and when you set the engine to TDC, and count back anti clockwise the pickup should on the 6th tooth from the missing one

 

are you using the ford cps?

is it working?

they tend to be a bit hit and miss when they've been moved about or dirty

 

Yes mates it's working ecu is picking up rmp on cranking so all good there

 

Are you using a shielded CPS wire?

Shielding should only be earthed on one end to prevent 'earth loops' from what I've been told.

 

65 deg is not massive, and there is NO chance whatsoever an OEM engine will have it's trigger reference at 12 or 22deg BTDC

Trigger reference, missing tooth, whatever you want to call it is not ignition timing which your 12 or 22 sounds more like.

If the 36-1 is OEM, and you are getting a good stable rpm reading when cranking, and the base map is configured correctly...

Sounds like you've the coils or leads wired wrong.

 

Check which way round the coil pack is wired up. I had a swine of a job getting mine to run on first start up when the Emerald was first on to my engine.
After lots of checking everything over for something amiss, it was 2 coil trigger wires needed swapping over

Was the dyno run done with the same ECU and wiring loom?

 

I have been on the phone today with Emerald today and they said the timing in the map cant be wrong.

they also said the same thing about the coil wires from the ECU maybe mixed up i.e. driver 1 wire from the ECU wired to driver 3 of the coil pack, makes sense.

I have already carried out a conductivity test of the wire all was good, but I didn't check which cylinder was sparking . so ill have to check that, if it still doesn't work I think ill be shipped off to the funny farm.

 

Lol have faith don't go bouncing off the walls yet

 

Like been said already, switch the coil wires around, it won't make it pop and bang any worse.

 

Well I switched the coil wires around and fired up and ran , couldn't believe it. Thanks everyone for your help

 

Top job m8

 

Cheers for your help

 

No worries m8 any time