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Joined: Sep 2009
Posts: 110
Enthusiast
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OP
Enthusiast
Joined: Sep 2009
Posts: 110 |
Recently my alfa 147 2.0 selespeed has started running like a dog and as its an alfa my usual garages wont touch it tuning wise my other alfa specialist is in st helens which is a a logistical nightmare Ive changed plugs , filters ,checked sensors etc etc but its running foul and guzzling the petrol can anyone recommend a decent tuner who is cheap
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Joined: Dec 2003
Posts: 5,683
Wiki Guide
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Wiki Guide
Joined: Dec 2003
Posts: 5,683 |
Is the timing correct? I heard these engines don't like belts.
"C20 LET bang"
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Joined: Sep 2009
Posts: 110
Enthusiast
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OP
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Joined: Sep 2009
Posts: 110 |
I will probably get belts done at same time as tune ,hopefully it is something that simple and cheap
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Joined: Feb 2010
Posts: 2,631
Forum Master
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Forum Master
Joined: Feb 2010
Posts: 2,631 |
Mike, I've sent you a few pm's asking for contact details on Peugeot....
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Joined: Sep 2009
Posts: 110
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OP
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Joined: Sep 2009
Posts: 110 |
Hi TheDr Ive replied sorry for the delay
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Joined: Feb 2010
Posts: 2,631
Forum Master
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Forum Master
Joined: Feb 2010
Posts: 2,631 |
It arrived just as I posted this, no worries, I've passed your details on so hopefully he'll give you a call soon.
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Joined: Aug 2010
Posts: 309
Old Hand
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Old Hand
Joined: Aug 2010
Posts: 309 |
Check the MAF, its a known Alfa/Bosch issue, I had a 156 V6 for two years, put three MAF's on it... Not my last Alfa, but certainly the last time I have one as my only car!
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Joined: Sep 2009
Posts: 110
Enthusiast
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OP
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Joined: Sep 2009
Posts: 110 |
i disconnected the maf and it still ran bad
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Joined: Aug 2010
Posts: 309
Old Hand
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Old Hand
Joined: Aug 2010
Posts: 309 |
Well - it will do, it needs that to meter the air mass being drawn into the engine, from that mass it then calculates the base fuel needed. If it made no difference at all with the MAF off, its likely the MAF.
If the MAF is voltage based (a hot-wire MAF) then you can check its output, probably be around 0.9 to 1.2 V at idle, if its anything further out than this, its likely goonered.
However - the Germans (who made all the engine electrics for the 147 - Bosch) are quite clever sorts, so I suspect the MAF is more likely a Karman-Vortex sensor, which outputs a frequency, in which case you'll need an OBD reader to see the air mass reading.
Failing that again, another possibility is the IAT (Inlet Air Temperature) sensor, this "might" be built into the MAF, again an OBD reader needed for that one - it corrects base fuelling against air temperature (as airs density changes with temperature).
And finally, the only other sensor that has a say on base fuel quantity (and its the biggest say of them all) is the ECT (Engine Coolant Temperature), once again, sad to say - its an OBD reader job.
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Joined: Feb 2009
Posts: 1,952
Forum Addict
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Forum Addict
Joined: Feb 2009
Posts: 1,952 |
pm ill throw it on my diagnostics machine and view live data. best bet to catch a dodgy sensor/ iffy timing.
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Joined: Aug 2010
Posts: 309
Old Hand
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Old Hand
Joined: Aug 2010
Posts: 309 |
As a side note - if you have an Alfa as a daily driver, invest in this -> http://www.alfadiag.net/If you buy the software, I have the correct OBD cable you need, which you can borrow if needs be.
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Joined: Jul 2008
Posts: 14,351 Likes: 20
Wiki Master
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Wiki Master
Joined: Jul 2008
Posts: 14,351 Likes: 20 |
Exhaust Gas Recirculation valve (EGR) is also a favourite. On some cars you can disconnect the vacuum tube, block of the inlet end and open the oil cap to effectively remove the EGR system as a quick check at idle.
The other things to look out for are air leaks (even very small) in the inlet system from the MAF onwards. Blocked EGR recirculation vacuum pipes, especially if they have a limiting jet in the pipe or at the ends.
Then there is fuel pump, injectors etc etc. What were the plugs like, any look different from the others?
From your description it sounds like its rough all the time, or is it just at idle?
Chris Gilly will do an OBD check for you and advise - he must be really ill today to have not jumped in by now.
We don't do charity in Germany, we pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn https://ddue.uk
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Joined: Sep 2009
Posts: 110
Enthusiast
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OP
Enthusiast
Joined: Sep 2009
Posts: 110 |
I have got the cable and software unidiag i tried before the snow and was baffled im trying to teach myself how to use it had a good read of instructions tonight i will run a diagnostic tommorow
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Joined: Feb 2010
Posts: 2,631
Forum Master
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Forum Master
Joined: Feb 2010
Posts: 2,631 |
If I come down with Lukasz tomorrow I'll bring the Solus with me and see if it can read anything.
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Joined: Aug 2010
Posts: 309
Old Hand
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Old Hand
Joined: Aug 2010
Posts: 309 |
Be aware that being a Selespeed car, there will be a number of proprietary fault codes (DTC's we call 'em) that aren't in ANY diagnostic tool, except for the genuine Fiat Examiner (the official tool used by Fiat/Alfa). So hopefully your fault is in something generic.
While something like a Sun Modus will talk to every car in basic scan-tool mode, only the proper manufacturer tool can do things like set up the selespeed position sensors and solenoids. This I think has to be done if the engine ECU is replaced.
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