Scimitar SE5 will not start

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noel6071
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Scimitar SE5 will not start

Post by noel6071 » Mon Nov 26, 2018 12:01 am

Hello Folks, my Scimitar SE5a will not start, it was running ok and parked her up in the garage for a few weeks and now she will not start. I checked the timing (just incase) and that appears to be fine, changed the spark plugs as they were very old ones in it, the running order is exactly as it should be, checked all leads to the plugs all them are fine, the battery is good, its getting fuel up, just will not attempt to start, its just turning but no effort to go. Any other ideas what else it could be? Really doing my head in, want to take her out for a drive.



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demonbluedays
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Scimitar SE5 will not start

Post by demonbluedays » Mon Nov 26, 2018 3:26 am

A few questions to through, just to make sure everything is covered:


Is the fuel getting *all* of the way through to the inlet manifold?

Is the fuel stale?

Is there a blockage in the carb such as a gummed up jet?

Are any of the fuel lines collapsing internally or bulging?

Is the fuel pump definately working as it should be?

Is the ballast resistor/any wiring disturbed that might be hampering engine running?

What about the dizzy cap and rotor arm?

Then if all of those check out:

Compression test: make sure one cylinder isn't down on pressure



Others should be along soon to offer anything I've missed as an idea


Tom "DemonBlueDays" Williams

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Scimitar SE5 will not start

Post by rebel alliance » Mon Nov 26, 2018 3:46 am

Have you actually got a spark at the plugs..pull the lead from the coil to the centre of the dizzy and hold it a few millimetres away from the engine block then crank it over...don't worry about engine compression , i doubt leaving it a few weeks would bugger that up 😊



noel6071
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Scimitar SE5 will not start

Post by noel6071 » Mon Nov 26, 2018 9:20 am

I checked for spark and it has a good strong spark so that rules that part out



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Scimitar SE5 will not start

Post by rebel alliance » Mon Nov 26, 2018 9:38 am

In that case i would spray some easy start down the carb and if it trys to start you know its your carb thats the problem



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Scimitar SE5 will not start

Post by Dave 6726 » Mon Nov 26, 2018 9:43 am

Are you 100% certain about the battery? Only reason I mention it is because on more than one occasion I found that the engine would turn over, but not fire until the starter was just in the off position i.e. that the starter was taking too much out of the system; when it was stopped, there was just enough turning motion and a touch more voltage to make it fire up.
In both situations, a full charge up on the battery seemed to cure the problem.



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Scimitar SE5 will not start

Post by scimjim » Mon Nov 26, 2018 10:49 am

Dave 6726 wrote:
Mon Nov 26, 2018 9:43 am
Are you 100% certain about the battery? Only reason I mention it is because on more than one occasion I found that the engine would turn over, but not fire until the starter was just in the off position i.e. that the starter was taking too much out of the system; when it was stopped, there was just enough turning motion and a touch more voltage to make it fire up.
In both situations, a full charge up on the battery seemed to cure the problem.
that sounds like the wire from the starter motor to the coil is high resistance (ie cooked :D )


Jim King

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), Sabre/MX5 auto (The Flying Broomstick),
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CURE THE FAULT - NOT THE SYMPTOMS

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Scimitar SE5 will not start

Post by Dave 6726 » Mon Nov 26, 2018 11:31 am

scimjim wrote:
Mon Nov 26, 2018 10:49 am
that sounds like the wire from the starter motor to the coil is high resistance (ie cooked :D )
Thanks for that, Jim. I'll have a look see if that seems to be problem. :)



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