Starting Annomaly

Hope someone can shed some light on this.

My p622tcMAN is pretty bang tidy, however there is one issue that has gone unsolved, for about twenty years, that I'd like to get to the bottom of before the next twenty if possiable!

I have checked the battery is charging properly

99% of the time the car starts first time every time, however (useally at the most inconvenient moment and useally after a long trip) it does not, the latest being on a day trip to Chester. I have been useing the car a lot lately, lots of short AND long trips without issue. Having started perfectly first time that morning it was then driven 45 miles without incident(and lights) surely an ideal oppertunity for the battery to be charged fully.

What happens? Well useally after a long journey, as in this case, the car will not be started for a while, however on this occasion I was not quite happy with my parking space so decided after switching the engine off, to restart the car and move forward slightly.

On turning the key through position 1 and 2 all is well, however on reaching three a loud click is heard (presumably from the starter relay?) and both the ignition/oil lights dim considerably. It obviously does not start. On releasing the key back to position 2 all the warning lights are lit fully once more.

After repeating the process 4 or 5 times the car starts whilst turning very slowly on the starter.

One would normally conclude a flat /damaged battery pherhaps, but I know the bateery is charging correctly and the car will start as normal later as it has done many times before.

On returning to the car two hours later it starts first time without issue, after driving home (45 miles) I turn the ignition off and again it starts first time. After not useing the car for two days (surely a bad battery would be loosing charge) I go outside and it starts first time!

Any ideas or suggestions greatly appreciated
 
Sounds like a starter problem.

The click you hear is probably the solenoid throwing the clutch? in the stater motor but the starter is not spinning. It is drawing power trying hence the diming of the lights but wont spin.

You can get them serviced which should sort this out. if you are stuck and need it started, if you have a bar, like you would find on a trolley, jack poke it down behind the manifold and tap the starter motor casing either as someone turns the key or not.

Colin
 
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Hi
Just a couple of items i would check first if your sure battery is good.
Both earth points, 1 on engine/chassis.
2 battery cable earth lead and its bolted to chassis point in boot.
Battery lead to starter connector point under drivers side carpet,these can work loose with time and cause starting/electrical issues.
In some cases can short circuit through floor as plastic insulators melt.
Wiring itself on starter motor/ not to easy to get to but worth checking.
Good luck
Clive.
 
As an aside, I've often wondered why starters with integral solenoids are called pre-engaged. Clearly they aren't, really. Anybody have an insight?

Yours
Vern
 
The solenoid throws the pinion gear into mesh when it fires ensuring the pinion is 'pre-engaged' before the starter starts turning. Inertia starters use the inertia of the pinion on a fast helix on the shaft of the motor to throw it into the flywheel. This means the motor is already turning when the pinion engages.
 
I had the same problem on my S1 TC. It turned out to be the battery isolator. I have an original optional extra Lucas isolator (SSB 103) which was installed some 22 years ago. Lately I had some starting issues with the symptoms you mentioned and wrongly concluded that the battery was on the its last legs . Upon installing a new battery and having the same symptoms, loud clicking noise and nothing else, I was sat inside the car and asked my son to turn off the isolator and noticed that the internal light flickered. I asked him to switch off and on a couple of times and a sometimes this flickering occured. I bridged the isolator and the car started normally. If you don't have an isolator check your earthing points properly.
I tried purchasing a replacement isolator but original Lucas ones are practically unobtainable. The only ones I found where imitation products which don't seem to be too bad but the knob does not have the Lucas logo and the base is slightly different. I have mixed and matched between the 2 and have an original looking with new innards isolator and didn't have any more problems.

Richard
 
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