starts then stops whilst driving - Alfa Romeo Forum
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(Post Link) post #1 of 5 Old 06-09-11 Thread Starter
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starts then stops whilst driving

Hi all.

Alfa 156 1.8 ts.

Car ran all day (15 miles). Started up again, ran for approx two minutes and shut down whilst driving low speed.

Replaced fuse 7.5 amp that controls the Yellow dash light Key Code, fuse is second row and second from top right under dash.

Evening, Car ran 6-8 miles no troubles , then started up again and within two minutes (1 mile) the same contact fused again.

Ran for several days starting and re starting several times, however stopped again on road.
AA came out as every time new fuse put it it blew it regardless of size.
He checked it over and removed a few Relays in front of battery,
he said there is a bit or corrosion on the ends then in put new fuse .

Car still running ok from cold but I am not doing many stopping and then restarting it.

Someone said it may be rev counter which was changed 12 mths ago which seems ok but does not match the revs, the old one was causing the brakes lights to fail, I cannot see it being the rev counter but only seems to happen when starting and stopping a lot and hot engine.

Any ideas what is causing the current surge and how to sort it?


Last edited by Bumpydog; 06-09-11 at 01:03.
Bumpydog is offline  
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It could be a number of issues:

Both issues could be unrelated too.
I'll put down the routes to check in order of logic and price/cost

Most obvious thing to check regarding the "stop" is the security of the connections to your battery, this could have a bearing on the fuse too. They are not the tightest and best connections in the world on an Alfa. Pay attention to the positive terminal beneath the maxi-fuse holder... Difficult to get at and often neglected because of this.

Check your earthing points to the left inner wing area... are they secure and in clean condition?

A relay sticking on can cause surge so try a second hand relay for now to see if that cures it.
While yo have the relay out, remove them all and keep them in order give all the connections a thorough clean up the re-install them.

*wildcard.... remove the bottom steering cowling and check the connection to the immobiliser transponder ring. It takes it signal from the little block in your key fob but if this connection works loose, it can cut the car out due to loss of signal, although usually a little key warning would normally show on the central panel between the dials, you may have missed it

Check/ remove/ clean / re-fit your connector block to the alternator (battery disconnected first to prevent residual charge) If it's still playing up..... Then try the following.

Get a "free" battery and alternator check done, many tyre and exhaust centres do this service.
Pay attention to the charge rate.... Does it fluctuate a lot? If so then the alternator may have a faulty regulator thus surge and drop. Many auto electricians can replace just the regulator at the fraction of cost of a new alternator so worth trying them before buying a new alternator complete.

Cutting out or refusal to start when hot can usually be a sign that the crank position sensor is failing... check/ remove /clean/ re-fit the connection block to see if that cures it first.

Good luck mate
(Post Link) post #3 of 5 Old 06-09-11 Thread Starter
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Join Date: Mar 2010
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Thank you for all this information,
the crank thing was changed 12 mths ago however I
will leave that till last due to getting at it.
Will try the others and let you know.

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156 1.9 mjet 16v

get your ecu codes read...........
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156 2.0 TSpart

hi bumpydog
if you can recall...what was the problem with the car?
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