Running lean, the story so far...

[977]

Worth getting a wideband fitted ?

[gmw9666]

Well chatting to Dave the alarm man I've clearly got some funky immobilizer wiring going on......so may need to dip my hand in my pocket to get the wiring back to stock

on another topic, my RoverGauge cable arrived (thanks Mark) so plugged it in at lunch and these are my readings. Took a couple of attempts of trying a different USB port on my old laptop before I got a "GREEN" communication link.....but go there in the end.

I took a pic of the top 2 photos are the car was cycling between the 2.....as revs ever so slightly moved

Good news.........no fault highlighted

Clearly this is just at idle, not taken for a drive / log yet

So how does it look?.....

[gmw9666]

and now with changing the MAF readings to direct and lambda to long term

[davep]

Apart from your fuel map and main fuel scaler/multiplier being for a bog standard LR 3.9 tune everything looks fine. Perhaps a chip with a TVR 4.3 cat map and tune will rid the car of the running lean problem. See:

http://www.stevesprint.com/remap-14cux/LR-TVR-sett...

Try screenshots (prt sc key) for clearer pics of RoverGauge.

[gmw9666]

davep said:

Apart from your fuel map and main fuel scaler/multiplier being for a bog standard LR 3.9 tune everything looks fine. Perhaps a chip with a TVR 4.3 cat map and tune will rid the car of the running lean problem. See:

http://www.stevesprint.com/remap-14cux/LR-TVR-sett...

Try screenshots (prt sc key) for clearer pics of RoverGauge.

The ECU does say "4.3 Cat" and the screen shot says "Tune R2967" which per your link is correct for this car?

Edited by gmw9666 on Friday 9th October 14:34

[davep]

gmw9666 said:

Randomly the ECU does say "4.3 Cat"

It may state that on the case or the chip but the ECU's program PROM is showing it has a Map 5 and multiplier for a 3.9 Land Rover. If you could download the PROM contents using RoverGauge and send them to me I'll confirm that either way for you.

[gmw9666]

davep said:

It may state that on the case or the chip but the ECU's program PROM is showing it has a Map 5 and multiplier for a 3.9 Land Rover. If you could download the PROM contents using RoverGauge and send them to me I'll confirm that either way for you.

well that would explain the fuelling

also noticed steve doesn't have a 4.3 cat on his his........BV yes but not a normal 4.3

[gmw9666]

Thought I'd provide a quick update...

Have sorted the fuel pump running constantly, Dave at HF Solutions popped round and within an hour had fixed the problem. A previous alarm cowboy or perhaps more than one at different times had cut out the white fuel pump relay wire by the CLU box under the dash, to fix this bodge they'd cut into the inertia switch live so it was constantly live vs being switched. All wires now back to normal phew and may I say for a reasonable price.

So switching gears I thought I would take the old girl out for a spin to play with my rovergauge now the fuel pump issue is fixed

Main observation is the speed is zero.....always! I'm sure that's not right

Here is a shot fresh out the garage so cold



And still showing no errors



And this is a shot trundling down the road showing zero speed?



And this is after a good 60 min run



And lastly a 3rd gear WOT video all within the speed limit

I will be shooting the passenger for taking these bad pics lol

https://www.youtube.com/watch?v=Uc_7Jc_43WI&fe...

I did take a log and I think I downloaded it correctly but no idea what it means lol

[ChimpOnGas]

Hi Glen, sounds like you're making progress

I did say that fuel pump running all the time was wrong when we had our Facebook chats.

I have to say you're more determined than I ever would have been with that TVR of yours, personally I would have just put the car on the Canems system and have done with it

Alarm aside a decent new aftermarket engine management system and loom would solve all your running problems in a stroke, and give you better drivability, performance economy & reliability too

Get David at HF solutions to pop a new updated Meta security system on and the car will drive better and be way more reliable than when it was new.

Good luck with it, Dave.

[gmw9666]

ChimpOnGas said:

Hi Glen, sounds like you're making progress

I did say that fuel pump running all the time was wrong when we had our Facebook chats.

I have to say you're more determined than I ever would have been with that TVR of yours, personally I would have just put the car on the Canems system and have done with it

Alarm aside a decent new aftermarket engine management system and loom would solve all your running problems in a stroke, and give you better drivability, performance economy & reliability too

Get David at HF solutions to pop a new updated Meta security system on and the car will drive better and be way more reliable than when it was new.

Good luck with it, Dave.

Technically there is no nothing wrong with the car now lol she's all fixed, drives great, no shunting, drives smooth, heaps of power and I mean heaps.........just want to ensure the old girl is tip top and the lean running showing at the Neil Garner event was a RR issue as others had vs my car.

Fun fun fun :-)

[ChimpOnGas]

gmw9666 said:

Technically there is no nothing wrong with the car now lol she's all fixed, drives great, no shunting, drives smooth, heaps of power and I mean heaps.........just want to ensure the old girl is tip top and the lean running showing at the Neil Garner event was a RR issue as others had vs my car.

Fun fun fun :-)

Glen, I wouldn't trust what was recorded on the that portable rolling road rig, if it was me I'd at least put a wide band AFR kit on it to see what was really going on.

Invest £156, drive around a bit keeping one eye on the wide band AFR gauge, and it'll tell you (accurately) everything you need to know.

http://www.ebay.co.uk/itm/New-AEM-Digital-Wideband...

https://vimeo.com/14006635

I bought the AEM X-Wifi kit that takes things a few steps further by deleting the AFR gauge altogether in favor of using your IPhone, the X-WiFi simply connects your Iphone to the controller over a wireless adhoc network.

https://www.youtube.com/watch?v=WK_SnnPJ7yI

In addition to removing the need to fit an ugly ill-matching gauge in your TVR dash it also allows you to hook your laptop up to the controller via USB and take AFR logs using AEM's free software.

You can then review your AFR logs over a cup of tea when you get home

http://www.aemelectronics.com/products/wideband-ue...

http://www.ebay.co.uk/itm/AEM-X-WIFI-WIDEBAND-UEGO...

The AEM X-Wifi is £100 more expensive than their standard gauge kit, but well worth it in my opinion.

If you are still on the 14CUX and want to see how it's really managing your air fuel ratios then some sort of modern fast responding wide band AFR monitoring system is essential.

Remember Rover Gauge is just showing you the lurching rich/lean efforts of the rather outdated and slow responding narrow band lambdas.

Edited by ChimpOnGas on Tuesday 20th October 09:56

[blitzracing]

Im assuming the speedo itself is working- this means the rear sensor is working, but there is a box of tricks under the dash called the speedo calibration unit. This has the job of converting the signal from the sensor into something the ECU can understand- although its pretty crude. It simply measures the signal and when it reaches around 3mph it puts a fixed 30-50 mph signal into the ECU- so RoverGauge should show a fixed speed above 3mph. It sounds like the calibration unit is either faulty or unplugged as the ECU is missing its speed signal. The effect is the idle speed will be low between gears and more of a tendency to lock the wheels on down change, as the speed signal lifts the idle by a few hundred RPM to smooth things out.

[gmw9666]

blitzracing said:

Im assuming the speedo itself is working- this means the rear sensor is working, but there is a box of tricks under the dash called the speedo calibration unit. This has the job of converting the signal from the sensor into something the ECU can understand- although its pretty crude. It simply measures the signal and when it reaches around 3mph it puts a fixed 30-50 mph signal into the ECU- so RoverGauge should show a fixed speed above 3mph. It sounds like the calibration unit is either faulty or unplugged as the ECU is missing its speed signal. The effect is the idle speed will be low between gears and more of a tendency to lock the wheels on down change, as the speed signal lifts the idle by a few hundred RPM to smooth things out.

yup, speedo works so will have a look for this calibration unit, my dash top is not bolted down yet so can remove easily.....what does it look like?

Edited by gmw9666 on Tuesday 20th October 15:44

[blitzracing]

Its a black plastic box about 3" x 2" x 1", and may have speedo calibration unit on it. Its tucked in the main loom loosely near the instruments on the end of a single plug connector

[gmw9666]

blitzracing said:

Its a black plastic box about 3" x 2" x 1", and may have speedo calibration unit on it. Its tucked in the main loom loosely near the instruments on the end of a single plug connector

ok, will take a look........ps - I sent you some data from my RG log ;-)

[gmw9666]

no black box I can see

the back of the speed has the blubs on either side and in the middle is a small black connector with 3 wires coming out going into the main loom

its a September 1993 car so would it have it located elsewhere???

Edited by gmw9666 on Tuesday 20th October 16:40

[QBee]

IIRC the early cars with the LT77 box & GKN diff don't have one. The speedo box only came in with the T5 box & BTR diff.

[blitzracing]

Good point- I dont know how TVR took a speed reading from the LT77 box. On the Ginetta (LT77 box) there is a unit in line with the speedo cable (mechanical) that produces the pulse as the cable rotates thats fed directly to the ECU.

[gmw9666]

QBee said:

IIRC the early cars with the LT77 box & GKN diff don't have one. The speedo box only came in with the T5 box & BTR diff.

A quick google and this is the best image I can find..........does look like the early ones have a sender from the gearbox.....pics courtesy of Barkychoc back in 2010

So I'm now thinking how on earth is my speedo working ok but the ECU reading ZERO

Edited by gmw9666 on Tuesday 20th October 19:22

[gmw9666]

and thank you Spend for your 2008 post

"The speed sensor on the box is only used by the Lucas Efi ECU. The sensor for your speedo is above the nose of the diff, driven by a crowned wheel at the end of the prop shaft"

that answers my speedo vs ecu question

Time to break out the multimeter again to test me thinks / clean up the connector under the car etc