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Is this a classic......problem ?


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is the glowplug timer relay working ?

a, does the glowplug dash light come on when you switch ign on

b, does the light go out after 6 to 8 seconds

c, do you hear a fairly loud click when the relay de-energises

a-yes

b-yes

c-yes

Oh and i forgot to add that the starter motor is sluggish even when the engine is warm,although a little bit less than on first start-up.

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Have you tried a fresh battery (or a jump from another vehicle)?

When you say it never starts 1st time, what *does* it do on the 1st try?

Does the solenoid engage?

Does the starter turn, if so does it turn slow or at normal speed?

The starter turns (cranks)slow,if i jump with two batteries and the starter turns fast will that indicate a problem with the battery.

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I'd nip to a battery specialist, they can do a drop test on your existing battery and if required sell you a new one. Although there'll be a specified capacity for your car, you can probably fit a physically bigger one in to give you better than original spec. When I bought the battery for the 109 I gave them the dimensions of the battery box and told them to fill it with battery rather than giving a battery capacity.

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you should see about 12.5v or more in a fully charged battery

I'd nip to a battery specialist, they can do a drop test on your existing battery and if required sell you a new one.

Whilst 12.5 is the correct voltage for a rested 'charged' battery, you really need to do a loaded (or 'drop') test to find out if the battery is any good.

A knackered battery will charge and show 12.5 (ish) volts across its terminals, until you load it, at which point it will quickly fall off to maybe only a few volts! A decent battery will hold a voltage much nearer to 12.5v whilst under significant load.

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The battery to fit is the biggest that you can get in there :) I have 2x 674 batteries under the seat they are 90ah 355*175*213mm in size. I had lots of starting problems in cold weather (-3c) with the original size batteries which were really too small for a diesel engine.

Oh, and I think big batteries kept charged up with a switching charger like a CTEK will last a long time. One of my batteries was bought in May 1981 .....

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The battery to fit is the biggest that you can get in there :) I have 2x 674 batteries under the seat they are 90ah 355*175*213mm in size. I had lots of starting problems in cold weather (-3c) with the original size batteries which were really too small for a diesel engine.

Oh, and I think big batteries kept charged up with a switching charger like a CTEK will last a long time. One of my batteries was bought in May 1981 .....

This morning before starting the battery voltage was 12.52.

The battery is a 70 AH 640 A, Which doesn't take up too much space in the battery compartment I'm thinking it might be a bit on the light side for a 300 tdi,I remember the the previous owner told me it was new,I think he may have got the best buy and just stuck it in.

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