High idle and drop very slowly - Page 7 - LotusTalk - The Lotus Cars Community
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post #121 of 145 (permalink) Old 05-28-2015, 08:19 AM Thread Starter
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Originally Posted by turbophil View Post
They actually "borrowed" that suggestion from me, but messed up the message...

Disconnecting the battery doesn't do anything.

Following an ECU reset (only accomplished with Lotus tool, BOE fastworks software, or Koldfire cable), you warm the car to operating temp, drive for 10 minutes, and then let idle for 10 minutes before shut down. That will typically dial in the idle tables after a fresh reset.

-Phil
Phil, wonder how is the progress of BOE fastworks for black dash?

S240 Exige S with BOE FW300 + over 40 mods
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post #122 of 145 (permalink) Old 05-28-2015, 01:12 PM
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Question to Phil. In my town there is a lotus scan tools 3. it can restart the ECU in my Lotus Elise SC 2008?
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post #123 of 145 (permalink) Old 06-03-2015, 11:05 AM
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Phil, wonder how is the progress of BOE fastworks for black dash?
there is something new?
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post #124 of 145 (permalink) Old 10-20-2016, 09:46 PM
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Sorry to ping an old thread, but was there any progress made with the idle issue? I'm having a similar issue with a 2006 Lotus Elise with a Katana Supercharger. Been in an out of the local Lotus garage a few times and nothing seems to have worked so far.

-Vacuum leaks checked and fixed
-Spark plugs changed
-Corroded plugs on loom so whole loom changed.

Not sure what the next step should be.
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post #125 of 145 (permalink) Old 10-21-2016, 09:46 AM Thread Starter
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Sorry to ping an old thread, but was there any progress made with the idle issue? I'm having a similar issue with a 2006 Lotus Elise with a Katana Supercharger. Been in an out of the local Lotus garage a few times and nothing seems to have worked so far.

-Vacuum leaks checked and fixed
-Spark plugs changed
-Corroded plugs on loom so whole loom changed.

Not sure what the next step should be.
No solution for mine neither

S240 Exige S with BOE FW300 + over 40 mods
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post #126 of 145 (permalink) Old 10-21-2016, 11:12 AM
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MAF...O2 sensors...?

** save ~10 lbs gain 1 hp ** EQ: Y=(190*X) / (1984-X) where Y is (HP) and X is (lbs)

'07 Lotus Exige S310


WTC 2
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post #127 of 145 (permalink) Old 10-22-2016, 01:21 AM
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No solution for mine neither
Doh. Sorry to hear that. My issue is frustratingly intermittant. Hasn't happend since the loom was swapped out and then yesterday it was idling around 1500rpm when stopped at lights and return after revving or during gear change was slow. ....today it was completely fine....sigh. Guess i'm in the Idle High Club now...
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post #128 of 145 (permalink) Old 10-22-2016, 01:22 AM
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MAF...O2 sensors...?
Thanks. Will check/swap those next and see if it does anything. Will let you know.
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post #129 of 145 (permalink) Old 10-22-2016, 04:29 PM Thread Starter
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Doh. Sorry to hear that. My issue is frustratingly intermittant. Hasn't happend since the loom was swapped out and then yesterday it was idling around 1500rpm when stopped at lights and return after revving or during gear change was slow. ....today it was completely fine....sigh. Guess i'm in the Idle High Club now...
Loom, which loom?

I changed O2 sensors and MAF too, but can't fix

S240 Exige S with BOE FW300 + over 40 mods
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post #130 of 145 (permalink) Old 10-23-2016, 02:44 PM
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Loom, which loom?

I changed O2 sensors and MAF too, but can't fix
The Engine bay loom/wiring harness

Lotus OEM Engine Wiring Harness ? 2006 Elise Exige | Monkeywrench Racing

Some of the metal contacts in the plug that connected to the ECU were badly corroded. Was told ECU side is fine but I haven't looked at it myself.

I think I may have found the problem of the re-occurance of my idle issue. Me. Since the new plugs and new loom were installed the car was idling fine and rev return was normal. My interest to keep learning about my car drove me to do 2 things.

1. Check my catchcans for oil with the built in dipsticks.
2. Pull 1 spark plug to check the model as the local lotus shop couldn't tell me other than it was an NGK branded plug.

Recalling this I checked the catchcan dipsticks and tightened them down and also removed and re-tightened the single plug I took out. After this took it for a drive and it still idled high and rev return was slow. But once I turned the ignition off and back on again it seems fine now. ECU may have had to re-learn if I caused a vacuum leak somewhere. I've driven it the past day and a bit and it seems to be running fine now. Ran it from cold start this morning (in New Zealand) and still ok. Fingers crossed it stays solid as I'm hoping to get it tuned in the next few months.
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post #131 of 145 (permalink) Old 10-28-2016, 08:41 PM
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Ok. So car was fine for a couple days and it started idling high at stand-still again and revs were hangning between gear changes and rev return was slow.

Also today, it threw a check engine light with some error codes

p1301
Unknown Diagnostic Trouble Code
p0303
Cylinder 3 misfre
p0304
Cylinder 4 Misfire.

Pulled a plug and it was carbon fouled. These were installed new at the end of July.

Now my thoughts are it might be the tune that might be causing it to run rich fouling the plugs and causing misfire and idle problems. The previous owner of my 2006 Lotus Exige had a Katana Supercharger installed and a flash tune from Sector 111. Let me know if I'm barking up the wrong tree on this and any knowledge would be appreciated. Would I be right in guessing the flash tune from Sector 111 is based on US fuel grades (the New Zealand fuel grades are different) and would potentially cause the engine to run rich fouling the plugs etc?

The highest fuel grade here in NZ is 98RON.

I'm now talking to a different mechanic who is also a well known tuner. Will update here when I see him on Wednesday and he tells me what's what. I did think about going back to the local Lotus Specialist, but thought some fresh eyes might be good.
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post #132 of 145 (permalink) Old 11-04-2016, 07:44 AM Thread Starter
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I changed the loom and spark plugs in last week, but no improvement

S240 Exige S with BOE FW300 + over 40 mods
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post #133 of 145 (permalink) Old 11-04-2016, 11:30 AM
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I changed the loom and spark plugs in last week, but no improvement
Do you have the BOE/fastworks tune and PC software?

** save ~10 lbs gain 1 hp ** EQ: Y=(190*X) / (1984-X) where Y is (HP) and X is (lbs)

'07 Lotus Exige S310


WTC 2
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post #134 of 145 (permalink) Old 11-04-2016, 12:22 PM
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Originally Posted by theflinch View Post
Ok. So car was fine for a couple days and it started idling high at stand-still again and revs were hangning between gear changes and rev return was slow.

Also today, it threw a check engine light with some error codes

p1301
Unknown Diagnostic Trouble Code
p0303
Cylinder 3 misfre
p0304
Cylinder 4 Misfire.

Pulled a plug and it was carbon fouled. These were installed new at the end of July.

Now my thoughts are it might be the tune that might be causing it to run rich fouling the plugs and causing misfire and idle problems. The previous owner of my 2006 Lotus Exige had a Katana Supercharger installed and a flash tune from Sector 111. Let me know if I'm barking up the wrong tree on this and any knowledge would be appreciated. Would I be right in guessing the flash tune from Sector 111 is based on US fuel grades (the New Zealand fuel grades are different) and would potentially cause the engine to run rich fouling the plugs etc?

The highest fuel grade here in NZ is 98RON.

I'm now talking to a different mechanic who is also a well known tuner. Will update here when I see him on Wednesday and he tells me what's what. I did think about going back to the local Lotus Specialist, but thought some fresh eyes might be good.
Just to clarify: the car previously had a supercharger, and is now naturally aspirated but still running a S/C tune? Yeah, that certainly could create issues.

2005 Nightfall Blue Elise: Sport, Touring, Quantum Zeros, Pro Alloy, BWR De-Cat, Stage II, BOE Torque200 tune
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post #135 of 145 (permalink) Old 11-08-2016, 05:53 AM Thread Starter
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Do you have the BOE/fastworks tune and PC software?
Yes, I do.

S240 Exige S with BOE FW300 + over 40 mods
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post #136 of 145 (permalink) Old 11-08-2016, 11:11 AM
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Yes, I do.
Did you try clearing the codes/learning on the ECU? Let the car idle for 10 min afterwards.

My last tune was actually giving me problems. I had reset it like 4 times and then let it idle for 10 min and the car was still stalling. Phil set me an updated/redone tune and the car hasn't stalled once.

** save ~10 lbs gain 1 hp ** EQ: Y=(190*X) / (1984-X) where Y is (HP) and X is (lbs)

'07 Lotus Exige S310


WTC 2
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post #137 of 145 (permalink) Old 11-21-2016, 02:17 PM
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Ok. So changing the loom didn't help. New Spark plugs didn't help. Cleaned throttle body again. Didn't help. No CEL codes. Still idling high at about 1500rpm intermittantly. Haven't changed sensors yet. I did come across this thread:

https://www.lotustalk.com/forums/f3/l...4/#post5192850

The Katana mp62 supercharger I have is a pain to remove check the actuator. Might do this when I have the patience one day.....
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post #138 of 145 (permalink) Old 11-21-2016, 02:43 PM
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Ok. So changing the loom didn't help. New Spark plugs didn't help. Cleaned throttle body again. Didn't help. No CEL codes. Still idling high at about 1500rpm intermittantly. Haven't changed sensors yet. I did come across this thread:



https://www.lotustalk.com/forums/f3/l...4/#post5192850



The Katana mp62 supercharger I have is a pain to remove check the actuator. Might do this when I have the patience one day.....

Take it in to Lotus? At this point they could at least narrow it down for you.
Or send off your ECU to Sector 111 and request to reload the tune. Easiest options I can think of.
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post #139 of 145 (permalink) Old 11-21-2016, 10:51 PM
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Take it in to Lotus? At this point they could at least narrow it down for you.
Or send off your ECU to Sector 111 and request to reload the tune. Easiest options I can think of.
Hi Coyne. All that work was done by the local Lotus shop. Also, I'm based in New Zealand so getting it sent to Sector 111 could get pricey if I keep sending it back and forth. Thinking about getting the SSC PIP ecu anyway. Will see how I go. Thanks.
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post #140 of 145 (permalink) Old 11-25-2016, 12:08 AM Thread Starter
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Dude:
- I saw a lots of Lotus and Toyota have the same issue
- Visited Lotus dealer for lots of time, can't figure out.
- Changed so many things, can't fix it.
- Checked all the leak, can't fix it.
- Checked and replaced gaskets for the whole intake, can't fix it.
- Changed to stock ECU, Setcor 111 B300 ECU, BOE ECU, can't fix it.
- Changed loom and spark plugs, can't fix it.
- Changed and check all the gasket from header to muffler, can't fix it.
- Changed MAF, 2 X O2 sensors, can't fit it.
- Changed and check intake temp. sensor, can't fix it.
- Changed throttle body, can't fit it.
- Disconnect catch can, can't fit it.
- Changed paddle sensor, can't fit it.

Whatelse?
Wheel speed sensor?

S240 Exige S with BOE FW300 + over 40 mods
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