Another starting problem - with a difference?

[Blues]

Hi all, I have had a couple of instances of what appeared to be the well known "hot start" problem, most recently yesterday.

In an effort to keep the under bonnet temperature down (I have a supercharger fitted) i have this morning re-fitted the Mod-Wise two speed fan kit (powered from the starter motor positive lead). Testing proved all was well, they came on when they were supposed to, and i was in the process of testing that the half-speed fan stayed on after the ignition was switched off, which it did until the pre-set temperature was reached, when it powered off. All ok there then. I tried to start the engine again to test that the full-speed fan stayed on after ignition switch off, only to find that the car would not start.

I switch the ignition on, and:

The fuel pump primes.
When i turn the ignition key i get a click, but absolutely nothing else.
When i release the ignition key, i get a buzz.

I left it half an hour and tried again, same problem.

A meter across the positive connection of the starter motor and chassis earth shows 12.8 volts. The battery is less than two years old.

The fans still work if i set the start temperature to zero.

Could this be a relay? If so which one, how to i test it and how do i get to it?

Could it be a sticking starter solenoid? If so, how do i get it off?

Any other ideas? Pleeeeeeease?

[Cider Andy]

I'm assuming the click is coming from the solenoid? Check the battery voltage with the key in start position. If it's still healthy the problem will be the starter motor/solenoid assembly. If the battery voltage drops much below 10V it would indicate the battery's not well.

The starter motor's mounted with just two Allen screws. Once removed it's fairly easy to strip down. Cleaning it up internally may well prolong its life.

The buzz you hear at ignition off will be the stepper motor parking. That plus the fact you have a click from the starter motor and the fuel pump running up at ignition on would tend to suggest the immobiliser is working properly.

[Cider Andy]

Having read your post again, I assume you've removed the starter motor connections to re-fit the fan kit? Are the connections clean and secure?

[Blues]

Thanks Andy, the connection is finr and I get good voltage with the ignition ob. I have since checked the headlights whilst trying to start the car, and they do not dim at all.it seems like I need to remove the starter motor, but can only see obd of the bolts, found at the notton front. I need to get hold of a sufficiently large Allen key socket, but where is the other bolt please.

[Tvrjock]

Hi David
The other bolt is on the top of the Starter motor and is a real bugger to get of, if you need the allen key socket i have one just give me a phone and i will get it to you.
Graeme

[Blues]

Thanks Graeme, I just replied to your text. I'll give you a call later