So sparks in the right place but wont run.

[Agriv8]

The car will run on dizzie power no problem, used this to check the coils are firing in the right order at the right time ( marked the crank at 90 deg intervals )

switch over to coil packs and it coughs and splutters and backfires. about 8 deg adv being shown on the advance gauge. 

I there anything else that I need to start looking at missing or gudes to reed.

many thanks

Agriv8

[cliffb75]

Have you got enough dwell time set for your coilpacks?

Have you tried advancing the ignition more? (where does it run using the dizzy)

[dnb]

Mine is happy to idle with 10 to 12 degrees of advance.  It's not keen on anything less.

[Agriv8]

Have you got enough dwell time set for your coilpacks?

Have you tried advancing the ignition more? (where does it run using the dizzy)

Thanks cliff

Dwell angle havn't touched that on the vems. looking at the spark its there and its blue but gut feeling it seems week, I  will compare that to a spark given of the dizzie.

Re the dizzie thought that while going for a walk with the wife this eve. ie time it back the other way ( find out what advance when ticking over on the dizzie ) replacte that with the coil packs/vems.

Thanks

Agriv8

[Agriv8]

Mine is happy to idle with 10 to 12 degrees of advance.  It's not keen on anything less.

Intresting not gone as far as that will dail a bit more in tomorow.

I have been playing with your maps today while running under dizzie power.  It was running rich as expected so running req fuel 11 and used you map and used the shift function seems about happy after shifting it to -15 ( it stopped stinging my eyes !!! ) at which point was getting reasnoble Air fuel ratio ( aiming for 14 - 15 to 1 ) and a stablish lambda. Do you know what fuel presure you run  ( i am about 36 - 38 PSI - batch fire )

Thanks

Agriv8

[dnb]

My fuel pressure was 3.5 bar with the vac disconnected from the pressure reg.  It's a crappy FSE regulator, so is something like a 1.7:1 ratio rising rate (which is nasty for idling on big injectors, but good for the small ones).  My injectors are sequential.

I am using a dwell of about 3ms (I think - would have to check the config).  I found this gave nice fat sparks with my coils.  Your coils will probably prefer something different, but this isn't surprising!

I found the auto VE learn feature to be pretty useful.  The settings for it in the config I sent you shouldn't be too far out for you.  All you need to do is switch it on and let the car learn the fuelling by itself.  I think you have to manually merge the original map and the learned map using a keyboard command, but I don't remember what it is. 

[Agriv8]

Checked my dwell last night and its set to 2.65 can I safly increse this a little ( this should give me a bigger spark ?)
If my assumption is right this is how long the vems unit is going to chage the coil pack up before cutting the earth the resulting charged energy has no where to go but down the plug leads resulting in a spark. I belive I am looking for a nice blue fatish spark ( I have what I would consider a thin blue spark at the moment ) I there a way I can check that I havent gone too far ?

dnb what plugs are you running ? running NGK copper in mine been ok under dizzie power maybe the coil pack system requires diferent ? what gap are you running ?

I too am running a FSE ( disconected on the Vacume as vems will be able to a better job of giving more fuel when required) 

Hope to have a play tonight both Dwell and tickover advance as both my neigbors were out barbecuing / enjoying the sun yesterday and though I enjoy the v8 bable / bark I suspect that it could get a bit wearing as it interupts our normally quiet sedate neigbourhood 

kind regards agriv8

[dnb]

One of my neigbours used to live near Bristol Avenue.  He's therefore used to the things I get up to...

I'm running the standard plugs with the standard gap.  They were never a problem.
I'd try increasing the dwell by a very small amount to start with.  You only need "just enough" spark energy.  You're right with how it works.

[Agriv8]

Managed to get her running a vidio clip taken on my camera it Sound like it is knocking ot t1t's off trust me its not ( though those rhodes lifters are noisey) will pull her outside and try again soon. dnb yup 11 deg of adv and she is happy ( thanks  )

anyway here is proof with the dizzie off

http://s167.photobucket.com/albums/u157/Agriv8/?action=view&current=Full.flv

Anyway best get reading the tunning guide.

Regards

Agriv8

[dnb]

Excellent news!  Now there's a few of us with RV8s running on VEMS, we're going to have to have some get together

[Agriv8]

We could get sponsered by Esso Mine cant pass one !!!!!.


regards

Agriv8

[dnb]

It will.  Mine does 30 MPG on the M-way since VEMS.

[Agriv8]

30 mpg  thats possibly somthing to look forward to !!! no whear near that under the hotwire setup

Anyway taken her down to the filling station under her own power tonight and a couple of tripps round the block. need to read up on the auto tune facility as thats the next job after i have swapped an injector out. ( no 8  ) as that particular exaust primary was a lot cooler than the others getting a spark to it and there was no exhaust popping ( so no unburnt fuel ) will double check continuity before.

The tickover was steady as a rock ( even when sticking a all the big voltage pulls main beam / fan ).

Also need to look at warmup enrichments and aceleration enrichments.

Anyone fancy taking a look at some logs for me ? Poss friday / the weekend.

anyway off to bed one very happy camper.

All the best agriv8

[rob@vems.co.uk]

Post the datalogs here and we can all sniff over them

[dnb]

Happy to have a look