1750 TBI Battery issue - Alfa Romeo Forum
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1750 TBI Battery issue

I fitted mudflaps to the TI last night, then went to start the car this morning and the battery was flat. I have charged the battery and it now starts fine though the yellow engine light is now on.

The car has had a few decent runs last week, so am trying to decide if the issue is just the battery.

the battery has charged to 12.8v

There is a current drain when everything is off, around 0.16 Amps, I tried pulling fuses from the engine bay fuse box - none changed the current, not sure if this is high?

The car is on its original Magneti Marelli battery and the previous owner did not use the car for some time (quite a few months) so perhaps the battery is on ts way out?

Will the engine warning light go out - or do I need to get it reset?

Any suggestions welcome.

THanks
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Did you leave the boot/glove box/doors open whilst you fitted the mud flaps? May explain the battery, particularly if its the original, that should've been replaced by now.

12.8v with the engine off is OK but not representative of the whole picture. You really need to know what it's charge capacity is (there are tools that'll tell you) and you should also check voltage with the engine running and also with an electrical load.



Engine management light - needs a diagnostic but may be battery related. They don't like low battery voltages.
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160 mA drain is quite high, however, was that with all systems shutt down, and interior lights etc. off ? It takes a while for everything to shut down.
20 mAmax would be more normal.

160 mA means 0,16*24 = 3,8 Ah / day

Don't know what size your battery is, but say it's 40 Ah. You don't want to drain it more then 50%, so with 160 mA it would last only 5 days ......
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Quote:
Originally Posted by Chris155 View Post
Did you leave the boot/glove box/doors open whilst you fitted the mud flaps? May explain the battery, particularly if its the original, that should've been replaced by now.

12.8v with the engine off is OK but not representative of the whole picture. You really need to know what it's charge capacity is (there are tools that'll tell you) and you should also check voltage with the engine running and also with an electrical load.



Engine management light - needs a diagnostic but may be battery related. They don't like low battery voltages.
The boot/glove box/doors open lights cant flatten the battery out.....if left on they automatically shut off after a few minutes. Just as well with the number of times Ive released the boot with the key in my pocket ...and left if ajar all night!!!
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Warning light has gone off today.

I have just ordered a new battery https://www.tayna.co.uk/car-batteries/exide/ea900/ , my logic was if I pull all the fuses and still getting a drain the issue is with the battery or the wiring to the fuse box (unlikely I hope).

I have also ordered a Micro-200 battery load tester.

Thanks folks.
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Originally Posted by alfaitalia View Post
The boot/glove box/doors open lights cant flatten the battery out.....if left on they automatically shut off after a few minutes. Just as well with the number of times Ive released the boot with the key in my pocket ...and left if ajar all night!!!
Yes I know that, not sure about the glove box though. The point remains though that if you're in and out of the car they can flatten the battery.
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(Post Link) post #7 of 10 Old 16-07-18 Thread Starter
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Sorted with new battery, perfect fit:


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Is the new battery the same size as the old one?
In my 1.75 TBi the battery is much shorter (242 x 175 x 190mm) but I am also considering to put in a 315 x 175 x 190mm or 278 x 175 x 190mm battery if I should change it.
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Quote:
Originally Posted by Henrik_45 View Post
Is the new battery the same size as the old one?
In my 1.75 TBi the battery is much shorter (242 x 175 x 190mm) but I am also considering to put in a 315 x 175 x 190mm or 278 x 175 x 190mm battery if I should change it.
Yes the new one is the same size: 315 x 175 x 190 with slightly more Amp hours. as link above.
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Sorry to revive an old thread but wondered how you got on with this battery, new to alfa ownership and the 1750 tbi i picked up had been off for a couple weeks when i picked it up, had a 1.5 hour trip home but it was dead the next day! Seen a thread stating to use the agm start/stop type as its more resilient, but thought id see how you got on with this first
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