sent some e-mail about someone fitting my scooby ecu and no replys, cars running crazy and could really do with the scooby ecu being fitted, its just sitting in my desk. if anyone can help.

Borich

 

I've fitted a few now (including soldering the socket into the ECU), but I'm not particularly local to you. If I can help I will.

[Edited by dnb - 1/9/2004 7:13:33 PM]

 

my m8 had a go and killed my ecu, i got a new ecu but im not sure if he killed the scooby ecu... do u know if theres a way of testing the scooby ecu?

Borich

 

I'd stick the chips in the PROM programmer at work and read the data from it to check it. That's not easy if you don't have a programmer though!

The other option is to fit it and read the data out through the select port.

 

Prolly best doing what David has already said - remove the Eproms and test in a Reader/Writer

 

If you get stuck mail me.

 

Not just PROMS on a ScoobyECU tho' but 2 Opto-isolators too..they may be blown or even the wrong devices.

Are all the devices the correct way round.
There is a small indent in the plastic case of each chip on one of the short edges. They should all be facing the same direction.

when I was building these Farnell accidently sent me 74ACT574's instead of 74ACT573's. So instead of opto-isolators I fitted D-type Flip-Flops (as the identification marking are so small) which gave interesting results.

 

if one of you guys could have a check of my scooby ecu and it its ok fit it 2 my ecu? my scooby has been overboosting all evening and its not fun to drive

Borich

my e-mail addy is king_borich@hotmail.com

 

overboosting with or without the ScoobyECU ?
what code ECU are you running in what car ?

 

its a standard 93 wrx ecu z8 ecu think? 2 cold 2 and dark 2 go out and check tonight. the car has no scooby ecu. but its running at 15-16psi theres no boost controller fitted and i have a dawes device on order. i was told that the scooby ecu may sort the problem. the waste gate is in fine working order, only other thing which has been changed is the forge blow off dump valve added, this i have been told may be causing issues. so i have got a hks ssqw thing on order.

Borich

 

ECU will probably be a U8... never seen a Z8
If you are running 15-16psi that is why it is fuel-cutting as it should only be running 11.47psi and fuel-cut is set at approx 14psi.

It sounds like there's a bleed valve or a hole in your boost pipework somewhere.

The Map sensor is seeing the right levels, as this will be telling the ECU and hence the ECU is correctlry applying fuel-cut.

I don't think a ScoobyECU will help, you'll just be moving the goalposts.

P.S I am assuming the ECU that got fudged wa doing the same ??

 

If the ScoobyECU has the fuel cut raised to 17.5 psi then this may well help when fitted?

But there is still some reason for the increase in boost pressure over standard.

You say there is NO boost control - have you removed the factory Boost control solenoid or by-passed it, changed the pipes to/from it? If the restrictor in the bottom hose is removed that may cause overboosting?

Else it's just the cold weather increasing the charge density which is just pushing the boost etc. over the limit?

I think Scott T and Pavlo are down your neck of the world, so best to see if you can pop round to them to look over the ECU, ScoobyECU, sensors etc.

 

there was a boost controller but it was removed and lost by my local garage long long story but i won't be going back there! the boost problem started when i added the new d/v. and ive tried resettting ecu.. the problems with boost started before my m8 tried fitting the scooby ecu. theres just standard piping where the boost controller was. also the car is extremely slow. holding back on me feels like. what makes it owrse im a student final year with so much work load on i have zero free time. so if there is anyone whos in my neck of the woods who can help. im willing to travel and pay

Borich

[Edited by borich - 1/10/2004 2:04:35 AM]

 

I'm on the Isle of Wight... At least it's south coast!!

 

have u got any way of testing the scooby ecu before the resistor is cut on my ecu, my worry is ftting the scooby ecu and nothing works

Borich

 

Sounds like cutting the resistor is something you dont have to worry about.

you should fix the problem with the std ecu before you start modding it as you will most likely just make things worse

dump the dump valve temporarilly get the boost control sorted then worry about the resistor

 

No way I can think of testing the ScoobyECU before cutting the resistor, besides what I've already said.

Sounds like you could have some wrong pipework round the wastegate solenoid... It has been known for the standard ECU to not control boost properly, so it's well worth looking at this - can you borrow one?

 

Sounds like there is a leak there somewhere. But it won't be on Map sensor side of thiongs as this is seeing the correct boost levels and indusing fuel-cut.

Fitting the DV on these early cars has been known to crack the platic 90 degree pipe that connects near to the turbo outlet (part of the intercooler plastic pipework).

under pressure this may be opening and hence bleeding away boost from the boost control circuit.

 

must be a leak somewhere as it was doing it with both ecus, when i reset the ecu, the car went like f**k but then it started to overboost and has got worse by the day until its back 2 its slow stage..

Borich

 

My ra was doing the exact thing as yours and guess what hapnd it blew up.