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Old 08-08-2005, 23:55   #1
ally2462001
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Rover 45 starting problem

can anyone help, car turns over but doesn't fire. occasionally starts first time, but normally takes 10 turns of key or more. when started, goes like a dream. have had new starting motor, new fuel pump, new immobiliser and it still wont start. its driving me mad!!! any advice welcome
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Old 09-08-2005, 21:41   #2
mg_xpower
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Do the sparkplugs fire when it isn't starting ? Do you smell petrol ? Do you hear the fuelpump starting when you put the ignition to II (before starting)

You'll need to know this in order to find the problem. Changing the immobilizer startermotor and fuelpump doesn't make sense to me since they can all be simply tested ?
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Old 10-08-2005, 00:19   #3
Vincero
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You have checked the HT leads and all the connections going to the coil pack??? Distributor also if you have one.
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Old 10-08-2005, 10:19   #4
ally2462001
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have found out since even crank sensor been done, all leads etc have been checked as garage been doing it all, but even they are stumped! the garages latest idea is the alarm system got a fault in it!
to mg_xpower, yes to spark no to petrol smell, yes to fuel pump

Last edited by ally2462001; 10-08-2005 at 10:27. Reason: add more info
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Old 10-08-2005, 12:17   #5
Ron
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Starting Problems

Might be obvious but have youn tried substituing the battery with a new one/fully charged/reliable one ?


Ron
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Old 10-08-2005, 13:03   #6
Rover_ron
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Once it has started, if you stop it soon after, does it start up again straight away?
So is the problem there only when the engine is stone cold or does it happen at random?

In other words, I'm thinking it my be the cold start enrichment. After 10 attempts enough fuel may have been injected for it to start.

Forgot to mention checking the battery cables - esp the neg lead at body earth point. I remember an earlier thread where this can cause poor starting due to the ecu not getting a good earth. I'd undo all the battery connections at both ends and clean them up. (make sure you have the radio code)

Last edited by Rover_ron; 10-08-2005 at 13:12.
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Old 10-08-2005, 17:06   #7
cjmillsnun
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Quote:
Originally Posted by Rover_ron
Once it has started, if you stop it soon after, does it start up again straight away?
So is the problem there only when the engine is stone cold or does it happen at random?

In other words, I'm thinking it my be the cold start enrichment. After 10 attempts enough fuel may have been injected for it to start.

Forgot to mention checking the battery cables - esp the neg lead at body earth point. I remember an earlier thread where this can cause poor starting due to the ecu not getting a good earth. I'd undo all the battery connections at both ends and clean them up. (make sure you have the radio code)
Yes I am leaning towards this. I suspect it may be either a faulty Coolant temerature sensor (most likely) which is reading warm all the time,

OR

a faulty/sticking IACV.
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Old 10-08-2005, 17:22   #8
ally2462001
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Unhappy

she runs perfectly and starts up ok after being turned off, its just the initial start up when i need to use her. would like to thank everyone for their advice to this problem, am passing it all on to garage as they haven't got a clue, nor has local rover garage!
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Old 10-08-2005, 18:17   #9
wol6
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check the cranking voltage may be the battery should not drop below 9volts
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Old 10-08-2005, 19:43   #10
dazultra2000
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OK ignore the post - didn't see you'd done the crank sensor.
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