Starting To Sort Out The Niggles

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Starting To Sort Out The Niggles

Postby Simon_P » Thu 04.04.2019, 11:13

Hi All,
I've rebuilt my elanscan cable and connected the Blue Car.

Went for a short drive from cold, mostly to try and identify the cause of the hesitation when cold a few hundred yards up the road from home, which happened on the attached scan at about 92 seconds.
Notice the IAC at 92 seconds and also see Flags 12 EGR and MAT - Any ideas?

Also the Knock counter, but no knock retard. Anyone seen this before? I'll check that it is plugged in for starters.

And
Flags 48 Stalled

Everest Chip if that makes any difference.
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Re: Starting To Sort Out The Niggles

Postby RonR » Tue 09.04.2019, 16:22

Simon,
Was this the first run after reconnecting the battery or ECU? Your IAC spike looks just like mine after I've had it disconnected.
The ECU needs to re-learn the position of the IAC after losing power, so when you first hit 30mph on part throttle it exercises the IAC to work out its correct position.
The closed loop manual says that "This process .... will not be noticed by the driver", so maybe it's a co-incidence that it occurs around the same time, or maybe there's a knock-on effect in some other system?

On the other hand the steadily climbing knock counter, even at idle looks suspicious. That's where I'd start looking, anyway.

Cheers,
Ron
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Re: Starting To Sort Out The Niggles

Postby Simon_P » Tue 09.04.2019, 17:26

Hi Ron,

Thanks for the input.

The battery hasn't been disconnected and it does it regularly. Mind you the wiring has had some "adjustment". And I have another elan that does the same thing.

I think that you could be on to something though. Now you mention it, it regularly occurs on light throttle in a 30mph zone probably the first time I hit 30mph. Please could point me to the right manual/pages. I'm going to see if I can recreate it by disconnecting the battery.

I did find one of the vac pipes disconnected and another melted on the EGR pipe so have reconnected them and will reset Idle again first.

it took me 3 hours to get the oil filter off yesterday so I didn't get much else done.
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Re: Starting To Sort Out The Niggles

Postby RonR » Tue 09.04.2019, 21:25

Your blue car is an S2 IIRC, so info comes from page 18-19 of the Closed Loop Manual V6 (Section EMJ) - courtesy of John (Brit-Car-Nut).
To save you a few clicks, Here's a direct link to it

BTW I got thoroughly hacked off with the oil filter last time I took one off, so fitted a K&N HP-1004 filter which has a hex protrusion - supposedly it means you can undo the filter with a spanner.
Guess I'll find out when the next oil change comes up in a few weeks.
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Re: Starting To Sort Out The Niggles

Postby Simon_P » Fri 19.04.2019, 01:17

Hi Ron,
I don't have a problem with the filter if it was me that did it up. Also the genuine Lotus ones have (or used to) a different seal, not solid, which was much easier to undo.

I tried the blue car and just as you suggested, as I hit 30mph it did it. Then I went home and took the front suspension off and the dashboard out.

I put the Green car on the road and that also does it. I've been trying to get to the bottom of this for a while, so knowing what causes the symptoms is a great help, thank you.
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Re: Starting To Sort Out The Niggles

Postby Simon_P » Wed 12.06.2019, 13:43

Front suspension now rebuilt, new bushes, top ball joints, wishbones derusted and painted, set the camber and toe but the castor is suspiciously 4 shimms front and rear so that will all need redoing .... and front brakes, new hoses and metal pipes, welded a new flexible section in the exhaust.... and a cambelt change while I was at it. Oh and the rack out to check for a clonk while I was there. I was only going to change another CV joint gaiter.

While I was doing all of this I found the main engine ground was not tight, a plastic vac hose from the evaporative emission system was melted to the EGR pipe and the manifold Vacuum connection was detached at the non return valve - Reset the idle.

Hopefully that should improve things. I will do another elanscan in the coming days.
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Re: Starting To Sort Out The Niggles

Postby HJ2 » Wed 12.06.2019, 15:09

Whow, what an impressive list!
When will you be able to change my CV Joint Gater? :-D
If you always do what you always did, you always get what you always got
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