Any idea what this is please ?
31 August 2009, 05:40 PM
#3
get a 
31 August 2009, 07:35 PM
#7
that looks like one of those £6 jobbies off ebay that trick the ecu in to thinking its getting more air so it bungs more fuel in. get rid of it, its probably making your car go slower and more likely to go bang 
Trending Topics
31 August 2009, 08:19 PM
#11
Scooby Regular
Join Date: Jan 2006
Posts: 3,695
Likes: 0
Received 0 Likes
on
0 Posts
Steady. Before you go cutting into the loom you need to work out for certain what this thing is doing and how it has been connected. If you simply cut it out and insulate the loose wires you might be fine, but you could also end up with anything from a check engine light to a car that won't run properly, or won't even start.
It's difficult to work out exactly what it is given that your pic is out of focus and we can't see what wires on the ECU loom it's connected to. Can you post us up some more pictures? Would be handy to know what type and model year your car is too. Oh - and on the device, what numbers are marked on the integrated circuit?
It's difficult to work out exactly what it is given that your pic is out of focus and we can't see what wires on the ECU loom it's connected to. Can you post us up some more pictures? Would be handy to know what type and model year your car is too. Oh - and on the device, what numbers are marked on the integrated circuit?
31 August 2009, 09:18 PM
#13
Scooby Regular
Thread Starter
iTrader: (4)
Join Date: Jul 2009
Location: Romford
Posts: 724
Likes: 0
Received 0 Likes
on
0 Posts
the Apexi unit isnt quite like that Stu ..... its erm...... an AFC thingy tho lol
I,l get a better pic tomorrow and also how its wired in to the ECU... wish I could post the damned pics
I,l get a better pic tomorrow and also how its wired in to the ECU... wish I could post the damned pics
31 August 2009, 09:32 PM
#14
Scooby Regular
Join Date: Mar 2009
Location: Shire of Devon
Posts: 781
Likes: 0
Received 0 Likes
on
0 Posts
That was my first thought, hence my comment. However it's just a guess on my part and could be wrong. The trouble is - even if it is one of those things, it could have been fitted and since then the ECU re-mapped with it in place which if the case may mean it has to stay or be re-mapped again if removed.
01 September 2009, 02:32 PM
#15
Scooby Regular
Join Date: Jan 2006
Posts: 3,695
Likes: 0
Received 0 Likes
on
0 Posts
The trouble is - even if it is one of those things, it could have been fitted and since then the ECU re-mapped with it in place which if the case may mean it has to stay or be re-mapped again if removed.
01 September 2009, 08:37 PM
#17
Scooby Regular
Thread Starter
iTrader: (4)
Join Date: Jul 2009
Location: Romford
Posts: 724
Likes: 0
Received 0 Likes
on
0 Posts
Surely even the eBay shysters wouldn't sell a bare, uninsulated piece of veroboard like that?
Exactly why a little bit of caution is needed prior to getting rid. Mike, if you can't post pics, can you at least tell us what numbers are on the integrated circuit (the little chip with eight legs) on that PCB? I'm guessing that the three pin transistor-shaped thing to the upper left by the red wire will have the number 7805 (or possibly LM317) on it somewhere, but if you can tell us it'll give us more chance of working out what it is.
Exactly why a little bit of caution is needed prior to getting rid. Mike, if you can't post pics, can you at least tell us what numbers are on the integrated circuit (the little chip with eight legs) on that PCB? I'm guessing that the three pin transistor-shaped thing to the upper left by the red wire will have the number 7805 (or possibly LM317) on it somewhere, but if you can tell us it'll give us more chance of working out what it is.
02 September 2009, 01:41 PM
#19
Scooby Regular
Thread Starter
iTrader: (4)
Join Date: Jul 2009
Location: Romford
Posts: 724
Likes: 0
Received 0 Likes
on
0 Posts
Ok I figured out how to post a pic lol. The markings on the square blue thing with a screw that I assume means its an adjustable pot of some sort is...BOURNS 3296
And the marking on the thing that "looks" like some kind of chip is....M71DL...LM...358N[IMG]
[/IMG]
And the marking on the thing that "looks" like some kind of chip is....M71DL...LM...358N[IMG]
[/IMG]
02 September 2009, 01:51 PM
#20
Scooby Regular
Join Date: Jan 2006
Posts: 3,695
Likes: 0
Received 0 Likes
on
0 Posts
Well spotted Mike, that blue box is a multi-turn pot, and the LM358 is a two channel op-amp. Reinforces the suspicion that this is a fuel cut defender, but there are still other potential explanations. The key will be to see how it is connected to the loom.
02 September 2009, 03:34 PM
#24
Scooby Regular
Join Date: Jan 2006
Posts: 3,695
Likes: 0
Received 0 Likes
on
0 Posts
The connections to the ECU power and wastegate actuator (boost control solenoid) would make sense if it was a boost clamp, but that wouldn't necessarily tie in with it being connected to the injector supply. Curiouser and curiouser...
02 September 2009, 03:38 PM
#25
Scooby Regular
Join Date: Jan 2006
Posts: 3,695
Likes: 0
Received 0 Likes
on
0 Posts
Oh - to answer your earlier question, FCDs are a way of getting round the safety overboost fuel cut built into the ECU. You'd normally see one if some sort of external boost controller had been fitted and the fitter had increased the boost near to or beyond the factory fuel cut limit.
As 53 says, they're not really the best things on the planet. However, bear in mind that, at this point, we're not really any the wiser about what that thing actually is. Given what you've told us so far, it doesn't sound like an FCD.
As 53 says, they're not really the best things on the planet. However, bear in mind that, at this point, we're not really any the wiser about what that thing actually is. Given what you've told us so far, it doesn't sound like an FCD.
Thread
Thread Starter
Forum
Replies
Last Post
Sam Witwicky
Engine Management and ECU Remapping
17
13 November 2015 10:49 AM
MightyArsenal
Wheels, Tyres & Brakes
6
25 September 2015 08:31 PM
