scudderfish
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 posted on 16/5/10 at 03:27 PM |
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V8 EDIS MS start!
It's alive! Bwah ha ha ha! I really need a jacob's ladder and a huge two blade switch on my garage wall.
Anyway, after realising that my coils were firing in the wrong order last night, I got it running today. It is not perfect though so yet more
guidance is needed please? 
I'm not convinced that my idle valve works. I've got another from Flack Monkey, but the pipework is much smaller so I haven't
fitted it yet. I adjusted the idle stop on the TB to ensure some air would get in for cranking.
It sounds to me as if it isn't firing on all cylinders. I don't know what a V8 sounds like when that is true, so I thought I'd
upload a video (http://picasaweb.google.com/dave.g.smith/MSEFI#5471887360663525218) so you could lend me your ears. I've also attached the MS
log of that run in case that helps. The O2 is probably wildly out as I haven't got the MS and JAW digital display to agree with each other yet
but I'm under the impression that the MS ignores the O2 during warm up.
Regards,
Dave
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Paul (Notts)
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| posted on 16/5/10 at 04:44 PM |
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Xtreme Kermit
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| posted on 16/5/10 at 05:24 PM |
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happy day!
Definitely sounds like it's not firing on all cylinders. It should purr a bit more than that.
Have you checked for sparks on all 8, and squirts at all 8?
Great progress though - nearly there!
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scudderfish
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| posted on 16/5/10 at 05:31 PM |
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I have 4 injectors firing into a common plenum so if one packs up I may not notice. I'm checking sparks next. Unfortunately I can't do
much more until Thursday now. My ignition leads don't have any slack in them, so I wouldn't be surprised by a lack of spark if one or
more leads wasn't perfectly seated on the plug. I'll probably make up a new bracket for the packs so I can shift them a bit.
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omega 24 v6
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| posted on 16/5/10 at 06:04 PM |
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WELL DONE
If it looks wrong it probably is wrong.
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matt_gsxr
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| posted on 17/5/10 at 03:56 PM |
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excellent, just need a quick spark hunt and then you can destroy the rear tyres!
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darrens
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| posted on 17/5/10 at 05:51 PM |
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Definitely missing that and does sound like it's missing on two, so could very well be one injector that is iffy.
Is it standard V8, i.e no high lift cam etc. Even with a high lift CAM (which i have) it should be a pretty constant hum. Sometimes difficult to tell
with one but that sounds like two.
Cheers
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scudderfish
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| posted on 17/5/10 at 06:02 PM |
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This is an early picture of what I'm doing. The injectors are in the 4 barrel unit above the Offy 360 inlet manifold, so if the death of one
was causing a misfire, it wouldn't be as regular (I assume). I suspect either a coil in my coilpacks which would take out two sparks, or just
my inability to buy leads the right length as they are very tight and may not be properly seated on the plugs. I'm going to move my coil packs
to relieve the tension.
It is a bog standard 3.5 V8 from a 1984 SD1.
[Edited on 17/5/10 by scudderfish]
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Paul (Notts)
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| posted on 17/5/10 at 07:47 PM |
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Def sounds like two . Could be one side of a coil pack not working or poor connection to coil pack from eddis.
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scudderfish
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| posted on 17/5/10 at 07:51 PM |
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I've just gone over all my leads with a timing light and I have no spark on 5 & 8 which both share coil C. I'm going to swap the
packs over to see if is my wiring to the pack or the pack itself.
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scudderfish
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| posted on 20/5/10 at 04:13 PM |
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I should write this up properly as a guide of how not to do a MS EDIS V8 More wiring issues sorted out.
I've got sparks on all 8 now, but it still runs like a bag of spanners at idle and will die if I open the throttle. I need to check my timing
to eliminate that as a variable.
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David Jenkins
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| posted on 20/5/10 at 04:26 PM |
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Check that you've got all your plug leads connected to the correct terminals.
Mine behaved just like yours - started but ran rough and wouldn't rev above idle - until I swapped the leads for cylinders 2 & 3 (stupid
x-flow firing order!).
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scudderfish
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 posted on 21/5/10 at 09:26 AM |
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I could kiss you!
I had all the spark leads connecting the right plug to the right post on the coilpacks. However, in wiring a coilpack to the EDIS I had inadvertently
swapped a couple of lines so it was really only running on 4. Swapped them over and off it purred! Actually it roared as I had the idle screw far
too open and it idled at about 2500rpm.
It still dies when I open the throttle, and I have a leak in an exhaust joint, but I'm now getting fuel and sparks into each cylinder at the
right time so the rest is mainly an exercise in mapping. Time for a celebratory cup of tea
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