ECU Needed for 2003 Esprit - LotusTalk - The Lotus Cars Community
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post #1 of 15 (permalink) Old 05-28-2019, 12:17 PM Thread Starter
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ECU Needed for 2003 Esprit

The ECU in 2003 Esprit keeps turning on the CEL for a few different emissions systems (most commonly I get P0442), but the systems have been thorough checked by my shop, and all are working correctly. So, they think there's an issue with ECU itself, but have been unable to locate one (at least at a reasonable price - the one they found was $6k!, which they advised against purchasing). They've tried RD Enterprises, Dave Bean, Brit Bits, JAE, and SJS Sports Cars. Anyone here have one available, or any other suggestions for where to look?
Thanks!
JL
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post #2 of 15 (permalink) Old 05-28-2019, 01:49 PM
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Hi John -

You could take a look at this Facebook (ugh!) group:

https://www.facebook.com/groups/1635326730112723/

There's a posting by a guy from Germany who apparently has a small stack of them for sale, listed at 2100 Euro (approx. $2350) each. I know nothing about the seller, nor the applicability of the ECUs for your application, but it might be worth checking out.

Best of luck!

Steve.

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post #3 of 15 (permalink) Old 05-28-2019, 02:08 PM
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Quote:
Originally Posted by BritInNY View Post
Hi John -

You could take a look at this Facebook (ugh!) group:

https://www.facebook.com/groups/1635326730112723/

There's a posting by a guy from Germany who apparently has a small stack of them for sale, listed at 2100 Euro (approx. $2350) each. I know nothing about the seller, nor the applicability of the ECUs for your application, but it might be worth checking out.

Best of luck!

Steve.
Surprised anyone has anything as folks generally describe them an unobtainable around here and on the turboesprit yahoo group.

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Last edited by Molez93; 05-28-2019 at 05:21 PM. Reason: Typo...what else?
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post #4 of 15 (permalink) Old 05-28-2019, 02:14 PM
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Originally Posted by Molez93 View Post
Surprised anyone has anything as folks generally describe them an unobtainable around here and on the turborsprit yahoo group.
I happened to be looking for wheels a couple of months ago and tripped over that Facebook group. There's not a ton of parts listed, but enough to make it worth glancing at from time to time. Hopefully it turns out to be a good lead.

Hadn't looked for a Yahoo group - I shall have to subscribe (can never have too many sources, right?)

Thanks!

Steve.

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post #5 of 15 (permalink) Old 05-28-2019, 04:25 PM
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Have you thought of trying some of the ECU repair outfits?

If not give a few of them a call. Its probably a simple fix for a PCB repair type.

I would check with some of the Lotus specialists like PUK they might know someone who can go through and see what is burned out - desolder and re-solder a new resistor or whatever in. There is several outfits that do that kind of work for car ECUs.

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post #6 of 15 (permalink) Old 05-28-2019, 05:10 PM
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That seller is here https://www.facebook.com/photo.php?f...type=3&theater
His name is Mike Sekinger, and he is a known guy in the Lotus community.
He said he had 6 available, but the ad says "sold" not sure if that means all are sold?


You could have it repaired, some say Bluestreak in the UK will still do it, some people have contacted them, and have been told they wont...
I've heard the diodes to protect the I/O die, and really only those need to be replaced?

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post #7 of 15 (permalink) Old 05-28-2019, 05:21 PM
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442 is not even supposed to come up as it is not "implemented" for the Lotus. Any ECU from 1998 through 2004 will work but you want it to have the HTU upgrade. The ECU is the LAST thing you consider, so, before getting another one you must check and check again to be sure. You do NOT want to buy an ECU, stick it in and still have the same problems. Repair, as posted, is another option. It is a GM ECU and there are places that do repair them. Just don't let them "flash" it. If you are getting evap system errors try to check out the whole evap system. There could be a problem in that system and it is causing an error that is not exactly the problem but it is all the ECU can say it is. Sometimes you have to interpolate the codes, especially if the error is not exactly what the system was designed to see. Clear out all of the codes and see what the first one to pop up is. if you have a Tech 1 you can activate and test each of the evap system valves. If the shop you are at doesn't have a Tech 1 take the car to a shop that does before you buy an ECU. Is there any evidence that the ECU got wet or hot? Rare for them to fail, especially that way, so I would be very suspicious of an ECU failure. A while back another member of this forum had a problem with his ECU. Turned out it wasn't a Lotus ECU. Make sure it has labels that it is a Lotus part. The wiring is a common source of problems. Check for a damaged wiring harness, a bent or backed out pin, etc.
David Teitelbaum

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post #8 of 15 (permalink) Old 05-28-2019, 09:14 PM
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The V8s are not GM ECUs. They are actually manufactured by an Italian company that does ECUs for other exotic car makers. They won't be of any help these days since this was done so long ago.

Otherwise, I agree with David; you'll see most people guide you away from the ECU because it's almost never the ECU, particularly if the car still runs. Also, the most "common" errors with the ECU are the spark drivers, and even that is very, very rare. We'd need to know whatever the other codes were to be able to really help, but here are a few ideas:

If your shop isn't intimately familiar with the evap hoses and routing, this is very likely caused by a leak in the evap system. What did the shop do to test that system? Here are a couple examples:

https://www.lotustalk.com/forums/f16...om-fix-460058/
https://www.lotustalk.com/forums/f16...0442-a-357225/

It could be as simple as a bad gas cap, or as complex as replacing some crappy clear hose. Both are cheap and fairly easy.

Jake
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post #9 of 15 (permalink) Old 05-31-2019, 06:17 AM
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P0442 is implemented in the V8 Esprit ECU! I received this error several years ago in my 2000 Esprit. I had to use a vacuum pump to pump down the fuel tanks and trace for leaks. I found that the filler tube under the gas cap was not allowing the cap to seat as the filler tube was positioned to far down the support plate. Once I removed the cap and taped off the filler, the P0442 went away. So, moving the filler neck up about 1/16" allowed the cap to seal. It was strange that it started happening after I owned the car for 3 years with no work done it that area. You can loosen the clamps on a hose and move the filler tube up the 1/16". What a pain.
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post #10 of 15 (permalink) Old 05-31-2019, 02:58 PM Thread Starter
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Thanks, everyone for the replies. The shop working on the car has thoroughly tested the emissions systems, replacing all suspect components (including hoses). There are no vacuum leaks, and the they also checked that the correct electrical signals were reaching the ECU. So, they concluded the ECU is malfunctioning. I talked to JAE again, and it seems there was a bit of a misunderstanding for our earlier conversation, and I now think they'll be able to help. I sure hope so!
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post #11 of 15 (permalink) Old 06-02-2019, 12:54 AM
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Hi John,

if JAE could'nt fix your problem and if you'r still looking for a ECU, i have one from a sport 350 which i replaced with a free progammable EMtron unit.
let me know if you'r still in need.

have a great day
kr. from Vienna
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post #12 of 15 (permalink) Old 06-02-2019, 05:43 AM
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https://www.lotustalk.com/forums/f95...-tuned-465634/

I noticed this for sale a few months ago.

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post #13 of 15 (permalink) Old 06-02-2019, 05:16 PM
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According to the manual -442 is not implemented. Perhaps it got implemented in the HTU and the docs were never updated. That would make sense, Lotus is notorious about bad/out-of-date documentation. The manuals are pieced together from old manuals.
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post #14 of 15 (permalink) Old 06-03-2019, 08:19 AM
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hi John,
if you could'nt fix your problem and if you'r still looking for a ECU, i have one. it comes out of my sport 350 and has the race-chip upgrade. i run my car now on a free progammable EMtron unit and have the lotus ECU sitting on the shelf for the last year or so.
let me know if you'r still interested.

[email protected]

have a great day
kr. from vienna
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post #15 of 15 (permalink) Old 06-03-2019, 08:36 AM
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Hi John,

have you been able to fix your ECU? If not, I have one from my Sport 350 (with a race chip upgrade) sitting in the shelve. Please let me know if you are still interrested.
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