Slow cranking over

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Slow cranking over

Postby Bean » 09 Jan 2008, 21:47

hi, long time no post sorry peeps :roll:
Had a bit of time over the xmas holiday to spend with the Chevette. Got a spark now and the carb has been welded back together.
My question is when trying to start the car it struggles to turn over. (It does turn over but slowly)
Hence its not turning fast enough to start the car. The battery we were using was a known good strong battery of my Peugeot van. We also used a 24v starting booster and it still turned at the same slow rate
Is it likely that the battery just hasn't got enough cranking power or is it more likely to be the starter at fault.
Would the 16 odd years of storage have knackered it?
Have been in touch with the previous owner and he say's it was fine when last usen in 1992.
Cheers
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Postby CancerWagon » 09 Jan 2008, 23:58

Corrosion on the connectors is possible.
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Postby Gordo » 10 Jan 2008, 09:29

It could also be a worn starter, bad earth or power cable.
If you have access to a voltmeter - even a cheap one will do - check the voltage between the positive terminal of the battery and the starter motor terminal. Then check between the negative terminal of the battery and the engine block/starter motor housing.
If either reading is higher than 0.1-0.2Volts, check each segment of the circuite, eg, from battery to solinoid, between the solinoid terminal, etc.
As the car has been unused for a while, I would expect the problem to be either the earth strap between the engine and chassis or the starter is just tired. Regardless, it's a good idea to clean all the connections.

Oh, you're running a slant 2.3, aren't you? We had a real problem with some of our CFs, they used a long battery lead and in the end we used custom*, very heavy cables for the battery and earth cables.
*Actually made from the (IIRC, 1/2" diameter core) cables used for the battery backups for the exchanges - good for over 1000A.
See your local auto electrical or heavy construction equipment shops to see if they can make up cables to your lengths and terminals.
While you're at it, check the condition of the motor brushes, clean the commutator surface with some fine wet and dry and a few drops of oil on the bearings.
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Postby Gordo » 24 Jan 2008, 10:38

If you're having trouble locating some heavy cables, you could cut up some heavy duty jumper cables - check the voltage drop in the old ones first, though.
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Postby Bean » 24 Jan 2008, 23:11

It allready has heavy cables from the battery. Hopefully have some time next week to have a look.
Will check and clean battery connections and all the earths and then look at all the wiring to the started.
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Postby Gordo » 25 Jan 2008, 10:33

Bean wrote:It allready has heavy cables from the battery. Hopefully have some time next week to have a look.
Will check and clean battery connections and all the earths and then look at all the wiring to the started.


Don't forget the earth straps/cables - the braided type are notorious for corrosion increasing the resistance -> slow cranking.
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Postby UpNorth » 02 Mar 2008, 13:12

Just came across this after a long absence. The starters on 2.3s are notoriously crap - especially if there's been any compression ratio increase.
Anyone have a 6R4 for sale? Unfortunately I've only got £1K spare but I could throw in a few eggs to sweeten the deal!
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Postby Bean » 02 Apr 2008, 21:32

Gordo wrote:If you're having trouble locating some heavy cables, you could cut up some heavy duty jumper cables - check the voltage drop in the old ones first, though.


Checked the voltage drop between the battery tonight. It only drops 0.03 volts from the battery to the starter.

Also took the starter out and checked it over. One of the earth leads inside the starter had come away and the other had almost come away.
Re-soldered the earths and cleaned all connections and brushes, but to no avale it still ony turns over slowly.

New starter i think :roll:
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Postby Gordo » 05 Apr 2008, 07:59

Give these guys a call - they may be able to set you up with something a bit more suitable.
http://www.canleyclassics.com/products. ... quekit.xml

On the other hand, I had a mate with a high compression Toyota and he had a separate starter button - he'd use it to get the engine turning over before hitting the ignition. You may still need to do something similar.
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