General Bravo "S" Reg 1.4 SE Stalling when idling

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General Bravo "S" Reg 1.4 SE Stalling when idling

Drammy

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Hi all, New to the forum so hello. My Bravo keeps stalling when idling, changing gears or braking. I have sprayed some air intake cleaner inside the air intake. I have taken the air intake off and sprayed/cleaned the unit underneath (is this the throttle body?). This seemed to make some immediate improvement but I've just had a phone call from the missus saying that it has been stalling again. Any ideas what it could be and what I can do about it? Cheers, Drammy
 
yeah thats the throttlebody, although technically its called the DFI unit. the throttle position sensor or idle speed controller are faulty, replace them with scrapyard parts (nos 3 & 7 on attached diag)
 

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Thanks for the quick response Jug, I am in the process of sourcing these parts now.
 
Right I've bought a new throttlebody and stepper motor and fitted and tested. It hasn't helped. It still stalls when taking foot off the accelerator. MickeyBravo, Not sure, I'll have a check for that when I get back. There is a spark plug looking light that is quite sporadic. You know the one that you're supposed to wait to go off before starting the engine, well that comes on quite often. What is this cause I read the manual but couldn't see how it related to my situation. Related? Drammy
 
Jug, I've found a reply from you a few days ago about having to disconnect the battery for 20 minutes, then reconnect and leave ignition on for 90 minutes etc. Should I have done this with a replacement throttle body?
 
There is a spark plug looking light that is quite sporadic.
same as the engine management light on other brands, it means the ecu is detecting a fault.

What is this cause I read the manual but couldn't see how it related to my situation. Related? Drammy
cause can be thousands of things, but i would be very surprised if it isnt related to your cutting out. the light means a diagnostic of the ecu is the easiest way to find out what is wrong. tell us the fault code and we can help.
 
I was hoping you wouldn't say that. I spoke to our local Fiat dealer and they wanted £82 to diagnose the problem!
 
MickeyBravo, Not sure, I'll have a check for that when I get back. There is a spark plug looking light that is quite sporadic. You know the one that you're supposed to wait to go off before starting the engine, well that comes on quite often.

Hi,im not much of a mechanic myself but im just goin off from a past experience i had with mine few week ago...
That light you see that you say doesnt go off and yur car keeps stalling...mine did just this..i got ti to the garage (kwik fit) as this is were my guarantee was from (thanks to my car seller :) it ended up bein a fualty lamba sencor..which as Jug says,its basiaclly involved with the ecu..telling the car how much fuel is needed (if im right somewhere along those lines lol)
they replaced it and when i got my car back,its back to normal..

it could be that,but like i said,its just a thought as seems the problems your having was same as me..

Mike
 
Thanks Mike,

I'll suggest to the garage that they pay particular attention to the lambda sensor then.


Cheers,
Drammy
 
Thanks for the help guys,

Update:

THe car has been into a garage and the diagnosis machine reported the following faults:

Control module diagnosis FIAT Motronic MA 1.7.3 Error Memory
463A - Immobilizer Engine Control Unit - Blocked
0203 - Speed/reference-mark sensor - no signal
FFFF - Control Unit Knock Control Module - Faulty

The mechanic told me he managed to clear 2 of the faults and we are left with 463A (Immobilizer Engine Control Unit Blocked).

They also found a huge crack around the manifold, which has been replaced.


SO, they actually haven't done anything other than replace the manifold and a couple of gaskets. The car is MUCH better although it has still stalled twice. The lights I mentioned in an earlier post have gone and no longer stay lit once the engine has started.

Some questions:
Is there anything else I can do to fix the occasional bottom out stall (having tried replacing the throttle body and stepper motor)?
Is the error 463A anything to worry about? If so, how do I fix it?
Are the other errors anything to worry about despite them clearing easily?


Thanks for your continued help with this.
 
the result suggests that your immob is causing the cutouts. you need to disconnect and then reconnect the wiring connector at the aerial on the ignition switch and the codebox behind the dash near the fusebox. both are connected together by the same wires so follow them the wires from aerial around the ignition switch to find the codebox.

alternatively, its also possible that the crank sensor is intermittently faulty. this is easily replaced and not expensive, so if the immob wiring trick doesnt work then replace the crank sensor.
 
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Thanx for the help i will give it ago this afternoon...any suggestions where to get the parts from?

Thanx again
 
Bit more of an update:

I have tried disconnecting and reconnecting the electrics you mentioned Jug but no change. I will try replacing the crank sensor once I get chance to find the parts, but...

I have found the following with the car now. It starts and runs fine from cold. On a return trip from time to time the injector warning light turns on and from then on driving in certain gears causes a total loss of power from the engine, despite it still running, as if the accelerator cable had snapped. I say certain gears as sometimes it is 5th, sometimes 4th and sometimes 3rd.

It now only stalls when the injector warning light is on.

I don't see how the injector warning light can relate to any of the errors the diagnosis machine detailed.


Thanks for the continued patience and once again, any help appreciated.

Drammy
 
I don't see how the injector warning light can relate to any of the errors the diagnosis machine detailed.
that light is used to show that the ecu is detecting a fault, that could be any fault at all, it does not need to be related to the injection.

yes i know it is a stupid symbol to use. fiat changed to the engine symbol a few years later.
 
Strange indeed.

I am waiting on delivery of a new crank sensor as I type.

Does this guide apply to the Bravo 1.4 S (S Reg). I am waiting for a Haynes manual to arrive but it probably won't be here till the end of the week...
 
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