setting the dizzy reference position

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M7R
MegaSquirt Newbie
Posts: 3
Joined: Sun Jul 26, 2009 11:42 pm

setting the dizzy reference position

Post by M7R »

Hi,

I hope you can all help me, I just purchased and insalled a engine into my mk1 golf thats running megasquirt for the fuel and ingintion timing, it came from another mk1 where it was set up and working perfectly.

the problem is that when I dropped it into mine and got it running it would pink low down, be a bugger to start and idle high when warm, also the engine is running hot. so I belive that the timing is now some how out and poss the fueling too, I retarted the dizzy timing a little to try and help things and it has reduced the pinking a little and lowered the idle when hot a smidge but it still runs hot and doesnt sound as smooth or a powerful as it should be...
I have spoken to the guy who did the maps for the engine and he says it sounds like some how the dizzy reference position has changed on the ecu so the euc now things the cranks in a different place,
The dizzy must be in a reference position and is set up by setting the MS delivered spark to ZERO and then setting the engine spark to the same by spinning the dizzy. The ecu is reset from sending out ZERO and your base spark maps are altered for all speed load conditions.
I do not understand why transplanting from one vehicle to the other would have the effect of causing det. But that is cars for you...
so can anyone point me in the right direction on how to do this? I have a laptop with a serial port and I should be able to get a lead from work ok, and the software is on the laptop ready, but I kind of need the car running right asap ( I had planned to get the engine in and running fine as I guessed there would be no probs with the ECU and I could then take my time to read all the manuals and take it all in in my own time...sods law is that has not been the case! :( )


The engine is a 2.0L 16v engine with multi point injection fitted, and a Eaton super charger fitted, its set up using a throttle tps, air temp, and dizzy feed, plus a map sensor. and has been running in the last car fine for 2 years.

cheers

Karl.
M7R
MegaSquirt Newbie
Posts: 3
Joined: Sun Jul 26, 2009 11:42 pm

Re: setting the dizzy reference position

Post by M7R »

Can anyone shed any light on this for me please?

Iis it the trigger offset that i need to look at?
M7R
MegaSquirt Newbie
Posts: 3
Joined: Sun Jul 26, 2009 11:42 pm

Re: setting the dizzy reference position

Post by M7R »

I think I have worked it out, what he means is that I need to make the trigger offset match what my timing light says, well vice versa, I need to move the dizzy untill it matchs the offset as this should have been previously set when the engine was mapped and I dont want to upset anything.
grippo
Site Admin
Posts: 286
Joined: Mon Feb 16, 2004 6:55 pm

Re: setting the dizzy reference position

Post by grippo »

He is exactly right.
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