Attempted to do a diagnostic check on ECU but only to find there's not pot to turn pulled ECU out looked round it..

any ideas???

Look on the side and there is a hole with a cross head screw on display, turn this and then on again and count the blinks. One set of blinks, then pause, then second set of blinks.

 

 

Simon

Jonny, have you got the stock ECU?? When I had a Superchips ECU in my car, it didn't have a pot or any LEDs. I was not happy!

 

Andy

Uh ? Surely Superchips just replace the chip (eprom) not the whole ECU ??

 

The pot, LED etc are mounterd on the main ECU circuit board.

The ECU is just a tin box with the PCB's inside. From memory the LED's and pot are visable through holes on the left handside of the ECU. You don't have to open the ECU to do a diagnostic.

 

The stock ECU and JWT ecu have the pot and LEDS on the left side and a diagnostic can be done with this tackle in place.

 

Simon

That wasn't the case with my Superchips. The box was completely enclosed with no holes to see a pot or LEDs. I was quite happy to swap it for a JWT!

 

Andy

What you mean another reason not be buy a superchips ecu!!!!!!

 

I thought it wasn't possible.

 

Reason 1 - No Pot access/no diagnostic

Reason 2 - They're complete toss!

 

Simon

So what do Superchips use, an old biscuit tin ?

 

I honestly don't believe that they change anything other than the chip (we already know they make bugger all changes to that). It is absolutely inconceivable that Superchips would provide a new ECU for a 300zx - they only charge £450 (+VAT & fitting!).

 

[This message has been edited by AndyP (edited 17-09-2001).]

Yeah, its obviously just a new biscuit tin. The internals will be exactly the same. No idea why it was like that but it meant that I couldn't diagnose my PTU problem when it happened last year Much happier with my JWT.

 

Andy

Quite right too. At least you know some decent R&D has gone into it, rather than some YTS computer hacker who knows just enough to be dangerous !

i think some of the older ecu's didn't have the diag pot.

 

when you get jwt, and probably superchips, they take the ecu you have and just swap it for one they have socketed already, so you probably ended up with someone else's....

 

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UK 92 TT White

Mongoose K&N AVCR

KYB Eibach

another way of putting into diagnostic mode.

http://www.twinturbo.net/ttnetfaq/FAQpages/ECUdiagnostics.html

 

Vijay

i thought you said you could'nt find any majirhauana in the ecu

Hang on a min. Craig. So you're saying that if you've got a later car say 93- and you send in your ECU to SuperChips, you could potentially get a 90/91 back??? WTF is that all about? Scarey!

 

And how early are you talking about for the ECU to not have the pot & LED???

 

Tim

;-(

 

P.S. Fancy leaving yer stash there! LMAO!

The story I hear from Pete at SE is that there are numerous differences between an early and a late ECU (or chip anyway) and there may be benefits to installing a late ECU in an early car. Apparantely cures some performance hiccups, uneven idle and other odds'n'ends.

So are we saying that you could buy a brand new ECU for a 1999 model say and slap it straight into your 90/91???

 

How much is a stock ECU from Nelson anyway?

 

Tim

;-)

 

Careful - new models (in the states at least) came OBD-II equipped.. That is they have an o2 sensor in front of and behind the CAT, if the cat fails or isn't present - then it goes into limp home mode..

 

I would put money that the 99 model in Jap land is OBD-II as well..

 

BTW - as far as I knew the differences in ECU's were mainly for the changes that happened to cars... notice on stillen.com for example that they sell different ECU's for (from memory) 90-93, 94 and 95-96 cars..

But these are US cars remember - where emissions laws changed a lot over the years (heck, if you live in CA you have to have a different ECU altogether for their tighter eimissions regs)

 

Az

 

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Yes.. I know my back wheels *were* on backwards.. They're not now, 'k?

 

[This message has been edited by aaronjb (edited 20-09-2001).]

Very late models are not interchangeable (97 onwards ??)

So is it fair to say this then:-

 

ECU model years

 

90/91 = ZX81 1K as standard

 

91-93 = ZX81 with 16K RAM pack and thermal printer(auto. toilet roll dispenser)

 

93-97 = ZX Spectrum with Horace goes Skiing free!!!

 

97-99 = F**kin' CREY super-computer on ACID!!! LARGE!!! Won't get one of these in yer 91 Z matey, will melt yer wiring...he hee heeeeee!

 

Accurate???

 

Tim

;-)

 

 

[This message has been edited by Timmy_Turbo (edited 20-09-2001).]