Eratic Idleing

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Eratic Idleing

N

Neil

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I have a Brava 1.2 16v and since I've had it there has always been a problem with the tickover being very irratic. This then evolved into a problem that would cause the car to cut out when coming to a halt. I took it in for a diagnostic check and was told it looked like a problem with the throttle valve. He changed it with a spare he had and all seemed to work ok and on refitting the original that also seemed to be working ok so we left it on for the time being. The car does not cut out any more but I have noticed it seems to take an age when stopping for it to drop down from 1500 revs to 800 and now when accelerating through the gears it is quite jerky and not a steady acceleration it should be. Any ideas from you budding car enthusiasts please.
 
ecu

It could be lots of things but if you haven't had the engine ECU remapped then I would get that done first. Look back in the forum for details regarding symptoms but the ECU seems to have an inferior "map" and needs the latest upgrade to run much better. Simple case of downloading a better map into your ECU for improved performance all round.
 
Remap

Have to go to your Fiat Dealer I'm afraid. Some specialist workshops may have the facilities but not many. It's only a 30min job at the most and should not be expensive. The ECU has a "map" or chart that it "refers" to and decides what fuel air mixture to give the engine depending on many inputs like temp, eng revs, throttle position etc. The original map with 1.2 engines is not great and a more recent map sorts out many of the problems like tickover, pick up on acceleration etc. It's a simple computer like download into your ECU just like updating windows (mind you that crashes too!)

I'm not saying it'll cure all your ills but it's a guaranteed place to start.
 
Remap

Have to go to your Fiat Dealer I'm afraid. Some specialist workshops may have the facilities but not many. It's only a 30min job at the most and should not be expensive. The ECU has a "map" or chart that it "refers" to and decides what fuel air mixture to give the engine depending on many inputs like temp, eng revs, throttle position etc. The original map with 1.2 engines is not great and a more recent map sorts out many of the problems like tickover, pick up on acceleration etc. It's a simple computer like download into your ECU just like updating windows (mind you that crashes too!)

I'm not saying it'll cure all your ills but it's a guaranteed place to start.
 
Re: Remap

Brian,
My Marea works OK and I have no major problems (I'm touching wood now!).
But - I find it annoying that when I press the accelerator the response is sluggish until the revs reach approx. 3500 - then the response is excellent.
Will a remap help?
 
sluggish marea

Hi Sean
Not so likely to be an ECU remap problem. The 1.2 engine ECU is shipped with a really bad map that doesn't really cope at all. It needs upgrading straight away and the ECU manufacturers ought be ashamed for such a pathetic configuration.
You don't say what engine you have but I would guess your problem lies elsewhere. Look through the forum for your particular engine problems.
regards
Brian
 
Re:ECU

Brian,
Sorry should have thought - my car is a W reg 115 ELX - I tried using the Shell super unleaded everyone's been talking about and it made no difference.
I've thought about performance filters, chips etc but I don't want to through money away if it won't make any difference.
 
REVING MAREA WEEKEND DUALFUEL

HI ALL,
Been having a few problems with my 1.8ELX Weekend. It runs on LPG and petrol but runs badly on lpg. Anyway it revs for no reason sometimes and jams on 2 to 3000 revs! Also on petrol only, it pauses a tiny bit when you put your foot down, this is only small but very anoying! The revving I can cure by red lining the engine, then it does not appear for the entire journey!.........
tried fiat...no help as usual getting desperate now..
Any ideas anyone????????

Thanks in advance

Simon
 

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