spoonana
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 posted on 28/3/12 at 06:52 PM |
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Xflow engine staring problem
Help, where am I going wrong. I have a just built a new Xflow engine for my Locost.
We have now fitted it into the car with a new type 9 gearbox and have a new battery, alternator, Weber 36DGV and now a new Bestek electronic ignition
system.
First time we tried to start the engine it would turn over on the starter motor, but it wouldn’t fire. We checked with Bestek and discovered that we
shouldn’t have wired the negative side and could have cooked the coil is it got very hot but could not discharge.
Now we try to turn over the engine and it will only turn a couple of degrees each time we turn the ignition switch. The battery only lasts a short
while before we need to recharge it, and we have 2 batteries on a rota!!
I don’t believe it to be the engine per se as it does turn, and being newly built I would expect it to be tight, however I shall die of shame if has
seized.
We have now bought a new ignition system so hopefully should we be able to turn the engine, hopefully it should then fire.
Bearing in mind everything is new I’m not sure whether we tackle the timing or the carb first.
Any thoughts as to where we go from here would be appreciated. We’re too late for Silverstone this week, but we really want to make Brands Hatch next
month
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Autosri
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| posted on 28/3/12 at 07:06 PM |
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too much static ignition timing would cause a slow turn over
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snakebelly
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| posted on 28/3/12 at 07:06 PM |
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Sounds like either a bad earth or a bad starter. Try wiring the battery straight to the starter and see if it turns over
Hth
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snapper
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| posted on 28/3/12 at 07:09 PM |
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Start with the basics.
Spark plug out but in a lead lay it on the exhaust manifold check for spark
Is it getting fuel?
Is the cam timed properly don't forget the cam turns at half engine speed so you can get 180 degrees out
Check engine and gearbox earth straps.
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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spoonana
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| posted on 28/3/12 at 07:13 PM |
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turnover
Blimey such a quick response.
Yep we have the battery wired straight to the kill switch and are starting it from that, before we wire the dash back in
Tried plug against the bare metal
believe fuel coming through as first and only time it fired we had a flame out of the exhaust (too rich?)
don't know about cam as such but believe earths are all ok
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johnemms
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| posted on 28/3/12 at 07:41 PM |
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Firing order 1243
Put a tiny splash of petrol down the carb to prime.
Try zero static advance to get it turning over - not kicing back n flattening the battery then hopefully firing.
Check your cam - I have a BCF2 fast road cam - this needs 16 degrees static advance idle 1000rpm !
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britishtrident
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| posted on 28/3/12 at 08:06 PM |
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Sounds like too much static advance.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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leon51274
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| posted on 28/3/12 at 08:19 PM |
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If its an old inertia starter motor id almost have money on it it'll be that's knackerd
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macc man
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| posted on 28/3/12 at 08:22 PM |
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I remember rebuilding an engine some years back that had the wrong ring size fitted. It made the engine very tight and turned over slowly. Filed the
ring gap and all was well. Just a thought.
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trextr7monkey
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| posted on 28/3/12 at 10:18 PM |
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If you are confident that timing etc is as it should be tow it and bump start- that way you eliminate the starter motor circuit/earth problems and get
the oil pumping around which must help a wee bit.
Also if you slacken the clamp bolt you can turn dizzy a bit until engine sounds like it is catching then tighten bolt and check where timing is at
hth
Mike
http://www.flickr.com/photos/14016102@N00/ (cut and paste this dodgey link)
Our most recent pics are here:
http://s129.photobucket.com/albums/p211/trextr7monkey/
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procomp
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| posted on 29/3/12 at 07:34 AM |
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Hi Max.
Did you establish wether you had the actual position of the potor arm and distributor cap in alignment as suggested on the other thread that was
started on FB. Also from the pictures on there where all the vacum take off points on the carburetor blanked off as they looked open on the pics.
Cheers Matt
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MikeRJ
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| posted on 29/3/12 at 08:50 AM |
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Would be worth turning the engine over by hand (e.g. by pushing the car whilst in gear, or socket on the crank pulley bolt) just to make sure
it's not tight.
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Autosri
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| posted on 29/3/12 at 10:08 AM |
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The way I'm reading it is they messed the ignition wiring up a little but the engine turned over normal as soon as the ignition is wired
correctly it turns slow surly the two will be related so would still guess to much ingnition advance
Retard the timing a little and see how it sounds
Our pinto did this with webers it needed 14 degrees btdc to run at idle but was slow turning over but started but with 20 btdc it would Not turn over
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spoonana
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| posted on 8/4/12 at 01:05 PM |
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Right then, bearings in and engine turns though then stops engine turned other way then stopped. Loosened cylinder head, loosened rocker then
tightened both now turns 360° but feel an obstruction in one spot. Is this likely to be just readjusting tappets or something else????
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