In my country, many "S" have idle issues... Sometimes is the throttle (drive by wire), sometimes is a leak in air duct (from/to IC), sometimes is ISC valve. First, you could try a TPS reset (sorry, I don't know the procedure), check electrical connections and air duct. Check MAF connections also...

Hope help.

 

Does Exige has ISC valve?

How to reset the TPS?

 

HKFEVER, YOUR PROBLEM STILL NOT SETTLE? SECTOR 111 GOT NO SOLUTION?:sad:

 

NO body can chip in ?:huh:

 

Fixed

Checked again, no code.

Ran to Toyota dealer this afternoon and bought a new MAF, plug it in right at the dealer's shop entry, less than 2 mins. Reset the ECU, it run A OK.

Drive home, feel A OK.

Love and hate for electrical problem, simple but need cash to solve it

Should have better ECU diagnostic program build in.

 

Not again.....

Change Oil, Clean throttle body, change air filter, then the high idle again.

Will check vaccum leak tomorrow.

 

Clear MAF, reset ECU throttle position, idle still high and drop very very slowly in both A/C or without A/C.

Change a NIB MAP, still same, but idle drop tiny faster.

Please check this video Lotus Exige idle high drop slow after clean throttle body - YouTube

At the beginning is with A/C on, and at 30sec I turn off the A/C.

You can see every dib, the idle will just hold the idle and take over 5-10 sec to settle down.

And idea?

 

2008 Vacuum Hose diagram needed

Hi, Guys, wonder who has the 2008 Exige Vacuum Hose diagarm handy?

Please post it.:bow::bow::bow:

 

When it's idling high, if you blip the throttle real quick, does it go back down to normal?

 

No.

 

For what it's worth, my Evora S does the same thing only while in sport mode. Show it to the dealer who said it was normal.

 

This morning a ex Lotus certified tech drop by my home and tried to help out. The following is what we did:

1. Check out all the vacuum hoses.
2. Disconnect the battery, to re-set the throttle plate.
3. Cold start the engine:
- Right after engine start, I heard loud heas heas sound near the engine front left area. The tech hear it too, can't figure out where it came from.
4. Shut down the engine and restart the engine, the sound gone.
5. Check all the vacuum hoses again.
6. Start the engine, closed out the vacuum line that provide more air when A/C on. No different with open or close the hose.
7. Double check all the hoses again. Nothing wrong.
8. Drive for normal drive 15 min. The problem remain.

The tech suggest to change the Multi Relay Unit under the ECU. He mentioned that unit has effect on ECU control the A/C idle.

Huhhhhh, any comment.

 

#3 hiss near front left of engine, which is close to far side of manifold from supercharger belt... Reminds me of a certain broken manifold bolt and air leak that caused a loud hiss on a supercharged Elise.

 

I had a very similar problem after removal of the butterfly unit and cleaning the MAF element.
I drove it for a few days, put maybe 100 miles on it and it s l o w l y went back to a normal operation.
I DID have the battery disconnected for a day so I could open the rear clam.
I have the VF blower set on it so I couldn't easily get into the engine stuff.
Car is normal now.....
''06 elise.
Sam

 

Today, I have changed a new MAF, new Multi Control Unit, clean the throttle body again.

But same same, the idle just hang there and drop very slow, some time will bonce back a bit.

Check with Lotus Dealer, they can't do anything with their Techcenter computer, as I have B300.
- Normally Lotus will do a ECU program reload to clear out all the previous setting back to factory default.

Any suggestion, guys?

 

Tried all things to diagnostic this issue.

Today, I have replace the ECU with my old S260 ECU, no help, idle drops tiny litlle faster but only tinnnny

So I have changed:
1. 2 new MAF, 1 loaned by the shop, 1 I bought in case shop's has problem;
2. Checked all vacuum multi times with different tech and me just in case;
3. Replaced Multi Function Control Unit, just in case;
4. Check all the fuses;
5. Disconnect battery multi times, even did what Charlix suggest shut down the engine without battery connected to force the ECU to reset;
6. Reset ECU by Kold Fire cable;
7. Replace B300 ECU with my old S260 ECU;

Same same. So on Sat I will transplant my friend's hrottle body to see what happen.

At the mean time any suggestion?

 

Help, anyone?

 

After transplanted my friend's throttle body to my bady. It just start up perfectly and breath correctly.

What did I do to the throttle body to cause this?

 

HKFever,

Did you catch a video of it? I had a similar issue on one of my R53 Mini Cooper S (supercharged model). Turned out to be a slow boost leak in an I/C hose, just not seated correctly.

I had to correct the leak, then reset the ECU.

Maybe when replacing the throttle body you corrected boost leak somewhere else?

-JM

 

Here is the video Lotus Exige idle high drop slow after clean throttle body - YouTube

 

Replaced a new throttle body, but same problem.

Can anyone help?

 

Update, this is what we tried today: :facepalm

Took out the good throttle from my firend's Exige ( his car runs perfect but his throttle is so dirty like a chimmy ) and installed my throttle in his car. After installation he has same problem as mine
- You may say the throttle body is faulty.


The interesting part is, my other friend installed Hurricane Induction kit from Elise Shop in UK in other shop. During the installation, his tech. cleaned the throttle for him. Then his Exige has the same problem as mine.


Both our cars (3 cars), can go up a 5-10 degree slope by itself without pressing the gas padel. We only need to release the clutch slowly without press the gas padel, then the car will go on by itself, keep on supplying gas or open the throttle to maintain RPM.

I just drove my car like this to 3rd floor in my parking lot LOL.

So all have same problem after installed cleaned throttle and new throttle.

Any idea :bow::bow:

 

Any suggestion guys?

 

This may be worth a read:

http://www.lotustalk.com/forums/f101/intermittent-dbw-throttle-sticking-revs-issue-79488/

 

Thank you, but mine don have throttle position sensor.

Dealer won't touch my car as it has B300 mod in it.

S111 told me to do the following:
1. Reconnect the battery.
2. Just start the engine, and let it idle for more than 10 mins. Then drive off
3. After the drive the car, I have to let it idle 10 mins, before turn it off
4. Start the engine, and let it idle for more than 10 mins. Then drive off
5. After the drive the car, I have to let it idle 10 mins, before turn it off
6. Start the engine, and let it idle for more than 10 mins. Then drive off
7. After the drive the car, I have to let it idle 10 mins, before turn it off
8. Start the engine, and let it idle for more than 10 mins. Then drive off
9. After the drive the car, I have to let it idle 10 mins, before turn it off

But I doubt it.

 

A quick question:

Have you tapped into the Throttle Position Sensor for a data logger?

 

Anyone?

 

As a point of reference my 2009 Elise, starts and immediately idles at 800 rpm.

 

This was my idle (800RPM) before cleaned the throttle body.

 

Can anyone explain the following:

1. in 1st gear, not apply gas, release clutch slowly, the car will go by itself without stall.
- A/F show rich (8.9...to 14....), the car try to maintain the idle.
- If the car almost stall, the A/F will go up to 8.9 and raise the RPM to maintain not to stall.
- the car will go up slope no problem

2. in 2nd gear, not apply gas, release clutch slowly, the car will go by itself without stall.
- A/F show rich (8.9...to 14....), the car try to maintain the idle.
- If the car almost stall, the A/F will go up to 8.9 and raise the RPM to maintain not to stall.
- the car will go up slope no problem

3. 3rd gear, same.

 

Help...