ESM Chips - Information & Help

[XiPHiAS]

XiPHiAS, which program you use entirely depends on your mood.
You should get a list of which program gives what boost setting. Then:
If you are leaving your car with a garage and you suspect that they may take it out for a spin, turn it down to minimum.
Going for a spirited blast or on a trackday? Turn it up to the max.
It's up to you.

Yeah I see ... I didn't mention there was a display onto the switcherboard.

[XiPHiAS]

I have another question ...

After decoding my VIN to see what PROM I have; I've found that my car has the 1944 PROM... and that's weird?

I've imported the car from Germany...

My car has LHD and don't has the big bumpers like they delivered in the US...

[davidjt]

Often wondered what 1-6 were for!

[XiPHiAS]

Often wondered what 1-6 were for!

You cannot see clearly that round-thingie is a LED display.

[Enright]

Ive got 2 Elan ecu's one's an early 9929 and the other is a 9930, can i just swap the whole lot over (ie metal box with everything in)? the reason i ask is that i have two everest chips and ones a v4.2 9929 and the other is a v4.5 9930. cheers

I think that the 9929 and 9930 have completely different CO potentiometer calibration, so in theory, yes you can swap from one to the other by just changing the boxes over.
In practice, you'll probably need a gas analyser to measure the CO output before you do, and then to adjust the CO pot to bring it back to the original reading afterwards.

I've moved the question to here because Alan is more likely to see it and confirm the above answer.

[MattDon]

Ive got 2 Elan ecu's one's an early 9929 and the other is a 9930, can i just swap the whole lot over (ie metal box with everything in)? the reason i ask is that i have two everest chips and ones a v4.2 9929 and the other is a v4.5 9930. cheers


ive reposted it as i couldnt find it except in your quote, not sure if this is the right place for it as its more of an ecu question but im sure if anyone can answer the question its Alan.

[ESM]

It never rains....

Judging by a couple of recent ECU failures that happened soon after switcher installations I have a bad feeling and so I am recalling all switcher kits that have the new version of the EX remote (pictured). I'll refund in full if the kit is undamaged. It might be a coincidence but I don't want to take any chances. I have e.mailed everyone who I believe might be affected but please get in touch if you have slipped through the net.

[chrishewett]

I was going to order an everest so the garage which has my car at the moment put it on their diagnostics and tell me that the prom id is 9099. ANXZ9099 to be exact.
Any idea what I do now?
Chris

[rip]

I was going to order an everest so the garage which has my car at the moment put it on their diagnostics and tell me that the prom id is 9099. ANXZ9099 to be exact.
Any idea what I do now?

Use Elanscan to take a PROM dump & send this to ESM.

[Enright]

Use Elanscan to take a PROM dump & send this to ESM.

As Chris had to get the garage to use their diagnostics, maybe he hasn't got Elanscan.
But quoting the above code to ESM may well be enough for him to be able to provide the appropriate upgrade chip.

[chrishewett]

You are right, I don't have elanscan as bigpockets havn't delivered the laptop I ordered two weeks ago!
I will try and send a message to ESM and see what happens.
Chris

[John_W]

Chris,
ESM is in Glasgow at the moment up to his elbows in alternators, and away from home.

However, our new search facility reveals this thread, in which Geoff identifies the anxz9099 as an early 9239 (see here for definition)..

See also this thread, and pjohn151 talking to himself here.

If you have problems meeting MoT emission levels then you need the 9930 SE chip mentioned here. In fact, my personal opinion is that you should always fit a 9930-based Mountain chip to an SE, and take the opportunity to upgrade from your old 9929-spec chip. This will give you a chip based on the latest Lotus specs which were brought out to ensure compliance with later emissions regulations, and so gives you a useful bit of leeway at MOT time. You will have to adjust the CO pot if you replace a 9929-spec chip with a 9930-based upgrade, but that's a doddle.

John

[rip]

If you want to fiddle & are really concerned about emission tests, then upgrade to a 1499 & fit an O2 sensor. The wiring is already in place too.

[chrishewett]

Thanks for all the help, what a great forum!
I will digest all this info and report back.
Chris

[Doug]

good helpful info everyone -- now who's going to drop it into the WIKI?? maybe with a few more directions regarding what's involved in changing the car inself with the new chips in place . . .

[Exbury]

Chris,
If you have problems meeting MoT emission levels then you need the 9930 SE chip mentioned here. In fact, my personal opinion is that you should always fit a 9930-based Mountain chip to an SE, and take the opportunity to upgrade from your old 9929-spec chip. This will give you a chip based on the latest Lotus specs which were brought out to ensure compliance with later emissions regulations, and so gives you a useful bit of leeway at MOT time. You will have to adjust the CO pot if you replace a 9929-spec chip with a 9930-based upgrade, but that's a doddle.

John

As my car is an SE (91) and in the garage and I have no idea which chip is fitted, from what I understand John, is that pretty much forget seeing if the chip is a 9929 or 9930 and just order a mountain chip based on 9930. Then take CO readings before, fit the new chip and tune in the CO pot (I know it failed its last emissions on CO (they were quite high to say the least). Then 'store' the old chip......just in case! As the car is goign for MOT after all this work, I have a feeling that even after tuning its going to have problems and I have always wanted an upgrade chip anyway!!

[John_W]

Exbury,
My car is an SE which had the old 9929 chip in it. When I put in a mountain chip a few years ago, they were all I think based on the 9930, as that was the chip supplied by Lotus according to the latest Service Bulletin. It ran fine straight away, but idling was a bit lumpy. After a quick confab with ESM, I adjusted the CO pot and all was perfect. I adjusted it by ear rather than with a CO probe in the exhaust, although the latter is probably preferable. Note that previously the CO pot was turned to its minimum to allow the 9929 to pass the MOT. When I fitted the 9930-based Mountain chip I had to move the pot away from its minimum setting to give a bit more fuel at idle.

As far as storing the old chip is concerned, you don't have to worry about that. As I mentioned in Paul Watkins S2 chip thread:

Paul,
I'm afraid it doesn't work like that. You don't end up with a spare old chip when you fit a Mountain chip.

The old chip is not independently removable but is contained in a housing which also contains the "limp home" circuitry. As such the old assembly is retained, and both it and the new Mountain chip are plugged into the adapter board such that the old chip (although present) is not electrically connected.

For a more lucid explanation see here.

John

The bottom line is that I'd go for the 9930-based Everest and adjust the CO pot.

John

[GeoffSmith]

The bottom line is that I'd go for the 9930-based Everest and adjust the CO pot.

[Exbury]

Thanks for that! Hope ESM has one spare around, its good to be back and even better if i get back in the Lotus....anticipated MOT test date next week sometime!

Jason

[ESM]

I'm up to my elbows in chips...