It's Sunday - time for confession Father

[Barrykearley]

Snuck out to the garage to stick her back together.

ecu now back in its rightful place.

Couldn't believe the ram air mod hadn't been done - has been now !!

I found the pc and Aldl lead and got onto scanning.

well error 22 is sat there. Tps too low - well there you go - sat at 0.00v. Bottom screw head shagged - top one ok. Give it a tweak 0.53v nip her up. Press throttle peddle - 83% maximum. So need a new one of them then !!! So it goes faster with the missing 17% ?? 

reset the error code and start up. Yep idling much nicer and smoother indeed.

im going to buy a new tps and iac valve tomorrow.

vacuum leak fixed earlier - now abs light isn't on ?? Does the vac pipe assist the abs unit ??

found this hiding attached to the Aldl wiring

maybe it's Tracker ?? Cut that out tomorrow 

[Barrykearley]

Sat next to the fuel tanks - a google search finds that's the place that most are installed. Out that comes tomorrow

[swindon_alan]

It's a Motorola mobile phone part Barry:

http://forums.mg-rover.org/mgf-mgtf-sponsored-mgfntfbitz-12/what-these-electronic-boxes-655753/

So bin it and the wiring. You probably have corresponding hands free mic and speaker connections as well.

So pleased about the S4s chip - I was right then! Is that all the difference there is between the S4 and S4s boost?

[Barrykearley]

I have no idea at all. It seems far more lively than the red one. More than 265 for sure. So s4s code would make sense. 

That ecu was a factory sealed unit - so it's been in there from new i reckon

Box will be skipped tomorrow

[swindon_alan]

On 16/01/2017 at 18:22, ian29gte said:

If you think you the engine is an S4s, have a look at the cylinder head. It may have the S300 designation stamped into it just above the coolant hose connection at the back end of the cylinder head, as they're the same as the S300. See page 4 of my refurb thread for a piccy.

Check out Ian's suggestion when you have a minute Barry.

[davevr6car]

S4s has a different head and larger inlet valves with some miner porting.....also has a different turbo......different flywheel and clutch plate and housing.

S4 engine is basically the same as the SE engine.......but yours has the S4s chip.

Have a look at the head as Ian suggested and also the number stamped on the Garrett plate on the turbo.

 

cheers

Dave

[swindon_alan]

What's the number difference between the turbos Dave?

[Vanya]

8 hours ago, Barrykearley said:

vacuum leak fixed earlier - now abs light isn't on ?? Does the vac pipe assist the abs unit ??

No, the DMIII system is an entirely seperate system. But the ABS/Brake Warning truly live their own lives at times. Check what pressures your system is running if you have the necessary tools! 

[Escape]

Just to add regarding boost: the dash gauge takes its reading from the intake plenum, before the throttle bodies. It is more prone to spikes when the turbo spools up. The ECU MAP-sensor uses the actual pressure in the intake manifold, so can differ a bit. I never did understand why Lotus decided to use 2 different pick-up points and have though about replumbing the lines so the dash gauge also measures manifold pressure instead of plenum pressure; Not that it would matter. :-) My boost gauge doesn't have a scale anyway. Readings I took via Espritmon were spot-on for an SE, so I now know where the needle is supposed to sit.

[sailorbob]

11 hours ago, swindon_alan said:

Is that all the difference there is between the S4 and S4s boost?

No, other things like the VE tables are different (which quite wrong for an S4 ).

[Barrykearley]

What's the VE tables ? @sailorbob I'm unaware of what this is........

I have no record of that ecu being changed - and if it was it had been sealed in place physically and sealed with a metal lotus seal - I'm bamboozled 

[swindon_alan]

It is sounding more and more like you have an S4s engine I reckon Barry. Check that S300 stamp thingy.

[sailorbob]

VE = Volumetric Efficiency

There are three of them; idle rpm, low rpm and high rpm.

As it's a re-manufactured ecu I suspect it's been changed at some point in the vehicles life.

Edited January 18, 2017 by sailorbob

[Chillidoggy]

My memory might be a bit cloudy, but I think the S4s T3/60 turbo may have a 0004 suffix to the part number, or looking at my notes it could be 461533-4 part number. It has a 60 trim wheel fitted on the compressor side, which I remember from my battles with Fawlty Turbos.

[Chillidoggy]

Looks like it was -4 suffix on the original turbo plate.

[Barrykearley]

that's the picture I managed to take yesterday. This is an S4 turbo by the looks of it

[franjipane]

Are you sure you haven't bought the V___GER prop from Star Trek?

[fjmuurling]

As you have hooked up the laptop to the ECU, you can read the PROM ID, which gives a (possible) clue of what chip / software is installed.

[Barrykearley]

Doh..... why didn't I think of that - off to the garage now 

[Barrykearley]

So I look at the heads where @ian29gte suggested. 

i have a "T" stamped there - wtf does that mean ?

scan the ecu and I get 

[Barrykearley]

1496 ???? What on earth is that @sailorbob

still cant reach the fan flap thingy - need the demist to work - can see a valve thing that was stuck - but wasn't that. There is a clusterfuck of cables slammed in there for a Nokia handsfree kit - so need to pull the radio

 

 

[swindon_alan]

http://freudhoefer.de/lotus/esprit/products/chips/4cyl.htm

So PUK #6 Red Race then Bob?

"For example, chip #6 will give around 330-350HP on a 100% healthy stock engine."

- Special code based on the improved S4s-Mk5 code (#2) - Max. boost up to 1.25 bar - Raised redline

[Barrykearley]

Well if that's the case @swindon_alan - then that would explain why I considered it too quick for what it should be. And that's with a knackered tps which only goes to 83%.......

doesnt explain the lotus metal seal on the ecu headers - or the sealed antitamper holographic labels which I broke though ...

[Chillidoggy]

I reckon that's an S4 engine and turbo, with a standard 1496 S4s EPROM, but not a PUK chip, otherwise you would be seeing more boost on the gauge. Unless the gauge is borked, of course. Despite the seals, it still looks to me like someone has been into that ECU, though.

[sailorbob]

The PROM ID of 0x1496 is the stock S4s calibration for the BNUB 'catch' code. It's also known as the "Mk V" code.