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Alfonso
Alfa Arna
Joined: 31 Dec 2003
Posts: 17
Location: Lithuania
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 Posted: Thu Oct 13, 2005 2:16 pm Post subject: Non-cat ECU to cat model |
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Hi all,
Will an ECU from a non-cat 33 16V work on a cat version of 33 16V with lambda disconnected?
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33 1.7 16V is no more (sob)
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ZeNiTh-PbArM
Alfa 33
Joined: 14 Mar 2003
Posts: 388
Location: Paris, France
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| Posted: Thu Oct 13, 2005 9:14 pm Post subject: |
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hi,
basically ECUs are the same just the octane coding relay is different (relay on the red plug)
so you can swap ECUs without trouble but if you go for unplugging lambda sond please remove the cat also or you'll fry it quickly and clog the exhaust.
regards,
zp |
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paulhide
P4
Joined: 20 Dec 2003
Posts: 1607
Location: Oh Beautiful Billingham
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ZeNiTh-PbArM
Alfa 33
Joined: 14 Mar 2003
Posts: 388
Location: Paris, France
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| Posted: Fri Oct 14, 2005 12:54 pm Post subject: |
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hi,
| Quote: |
| So what happens if you put the ECU from catted 16v into a non-cat one? |
it will work in non-cat mode.
ECUs are the same for all 16V
on the engine harness there is a relay-shaped device with internal jumpers which tells the ECU how it should behave (cat or non-cat, high or low octane fuel, so that's 4 combinations)
no relay is high octane, no cat
red relay is low octane, no cat
yellow relay is high octane and cat
blue relay is low octane and cat
if you want to convert from cat to non-cat, just remove the cat, lambda sond, and change the relay.
if you want to convert from non-cat to cat, you'll have to replace harness in order to be able to plug lambda sond, change the relay, and install cat and sond.
regards,
zp |
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baiones
Alfa Sprint
Joined: 08 Apr 2003
Posts: 130
Location: Portugal
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| Posted: Mon Oct 17, 2005 1:38 pm Post subject: |
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| ZeNiTh-PbArM wrote: |
hi,
| Quote: |
| So what happens if you put the ECU from catted 16v into a non-cat one? |
it will work in non-cat mode.
ECUs are the same for all 16V
on the engine harness there is a relay-shaped device with internal jumpers which tells the ECU how it should behave (cat or non-cat, high or low octane fuel, so that's 4 combinations)
no relay is high octane, no cat
red relay is low octane, no cat
yellow relay is high octane and cat
blue relay is low octane and cat
if you want to convert from cat to non-cat, just remove the cat, lambda sond, and change the relay.
if you want to convert from non-cat to cat, you'll have to replace harness in order to be able to plug lambda sond, change the relay, and install cat and sond.
regards,
zp |
Do you know the connections inside te different relais ?
The relais are really jumpers inside connected differently, right ?
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Baiones
ALFA ROMEO 33 1.5 QV
ALFA ROMEO 33 1.7 QV
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ALFA ROMEO Sprint 1.3
ALFA ROMEO 156 SW "Train Edition" ( it's a JTD... ) |
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Alfonso
Alfa Arna
Joined: 31 Dec 2003
Posts: 17
Location: Lithuania
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| Posted: Mon Oct 17, 2005 1:50 pm Post subject: |
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... and I'm confused about the location of the relay-shaped device. Red plug, engine harness - where is that???
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33 1.7 16V is no more (sob)
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ZeNiTh-PbArM
Alfa 33
Joined: 14 Mar 2003
Posts: 388
Location: Paris, France
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| Posted: Tue Oct 18, 2005 1:08 pm Post subject: |
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Hi,
here's a photo of the red plug :
center pin shall be left unconnected
top and bottom pins are ground pins
left pin (27) shall be grounded if lambda sond is to be used
right pin (10) shall be grounded for low octane fuel
regards,
zp |
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tvatavuk
Gold Cloverleaf
Joined: 13 Mar 2003
Posts: 673
Location: Split, Croatia
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| Posted: Wed Oct 19, 2005 9:43 am Post subject: |
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Alfonso, on LHD cars, it is near motronic unit (in front right of passangers feets). Behind place where passangers speaker should be on console.
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Tino Vatavuk
Little black dress which replaced Alfa Romeo 33 S 16v Permanent 4 GMo |
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Alfonso
Alfa Arna
Joined: 31 Dec 2003
Posts: 17
Location: Lithuania
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| Posted: Wed Oct 19, 2005 8:05 pm Post subject: |
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Thnx Tino!
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33 1.7 16V is no more (sob)
147 GTA |
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