Search found 212 matches

by david jenkins
Thu May 22, 2008 11:13 am
Forum: Operation
Topic: losing tps when engine is running
Replies: 9
Views: 4651

It's not something as basic as a loose connector, or a dry joint? Perhaps engine vibration is causing a disconnection. Try waggling the wires and connectors while measuring the voltage on the TPS wiper (white wire). Also check the Molex connector, as they can cause problems if the pins aren't crimpe...
by david jenkins
Tue May 20, 2008 8:22 pm
Forum: Future Upgrades
Topic: Mods to V3 unit for Aux input
Replies: 8
Views: 11600

Mods to V3 unit for Aux input

Brent, Have you thought about how the V3 unit will be modified to cater for the new Aux input functionality? The reason I ask is that I am just about to wire in a wideband AFR sensor controller (JAW), and it would be useful if I could make the mods while I've got the dashboard off, even if the firmw...
by david jenkins
Tue May 20, 2008 8:19 pm
Forum: Future Upgrades
Topic: MJLJ V4 in testing
Replies: 46
Views: 54011

Ah - I understand - so it could adjust the ignition setting depending on the current AFR reading, for example? Sounds useful - but it'll be another complicated thing to set up! :D
by david jenkins
Tue May 20, 2008 3:53 pm
Forum: Future Upgrades
Topic: MJLJ V4 in testing
Replies: 46
Views: 54011

Well, it's colourful! :D

Could you explain what you mean by 'Advance Correction', and how it would apply to the engine's ignition? I'm not sure I understand what it's there to achieve. :oops:

Cheers,
David
(surviving in ignorance, as usual!)
by david jenkins
Wed Apr 30, 2008 8:02 am
Forum: General Discussion
Topic: Might be of interest...
Replies: 2
Views: 3559

I'd be more interested in putting it inside the MJ box to supplement the data logging - and to drive a row of LEDs! :D
by david jenkins
Tue Apr 29, 2008 11:39 am
Forum: General Discussion
Topic: Might be of interest...
Replies: 2
Views: 3559

Might be of interest...

Following on from Brent's announcement regarding the next firmware upgrade, some folk might be interested in this device . The designer of the JAW Lambda/AFR unit is planning to produce a very small sensor management unit that will give a 0 - 5v output. I'd guess that it could be used as an analogue...
by david jenkins
Mon Apr 28, 2008 10:22 am
Forum: Future Upgrades
Topic: knock sens
Replies: 21
Views: 26707

I believe that reliably detecting knock is the hard part - noticing when it's happening, and not triggering on false events. It's all down to tuning the filters to match the engine. Might be beyond us mortals!

Actually doing something with the knock signal is the easier part.
by david jenkins
Mon Apr 21, 2008 8:52 am
Forum: Hard Rev Limiter
Topic: 998 mini
Replies: 12
Views: 16625

MartinM wrote:...plus, on some engines, a rather entertaining set of noises (aka explosions) and flames when the sparks come back, as the unburnt fuel in the exhaust manifold/pipe ignites :)
Sounds like fun! :D
by david jenkins
Mon Apr 14, 2008 8:04 am
Forum: Operation
Topic: Remote log controller
Replies: 9
Views: 6174

brentp wrote:Very cool, David! Excellent weekend project.

How about mounting those buttons on the steering wheel? :)
It had crossed my mind... :D
by david jenkins
Sun Apr 13, 2008 8:57 pm
Forum: Operation
Topic: Remote log controller
Replies: 9
Views: 6174

Remote log controller

I've been tinkering this weekend, following on from something said in another thread... When I'm driving along I want to be able to start, stop and mark logs without having to muck about with the laptop keyboard - not a good thing to do when you are supposed to be concentrating on your driving! :D R...
by david jenkins
Sun Apr 13, 2008 8:22 am
Forum: Future Upgrades
Topic: MJLJ V4 in testing
Replies: 46
Views: 54011

Looks good. Just 1 comment - it's a shame that it doesn't have a USB interface, considering all the issues people have had with serial-USB adaptors. However that's only a "wouldn't it be nice" observation!

I look forward to the new software with the external input stuff...

cheers,
David
by david jenkins
Wed Apr 09, 2008 7:54 pm
Forum: Future Upgrades
Topic: Log view
Replies: 9
Views: 12577

I think I'll try and find a broken keyboard at work (we have many PCs!) - one that functions properly but has keys missing, that sort of thing. The key control circuit board is usually tiny, and it shouldn't be too hard to work out how to replace the keypad with a few special buttons; it's only a ma...
by david jenkins
Wed Apr 09, 2008 6:10 pm
Forum: Future Upgrades
Topic: Log view
Replies: 9
Views: 12577

I suppose that it wouldn't be too hard to make up a little box that sends the space character to a PS/2 or USB port... time to Google, methinks... :D
by david jenkins
Wed Apr 09, 2008 4:41 pm
Forum: Future Upgrades
Topic: Log view
Replies: 9
Views: 12577

Brent, It's probably far too late, and probably too awkward, but I thought of another useful enhancement in a similar vein to this one: At the moment, if you're logging data on a run, you have to find and (hopefully) press the space key to register a 'point of interest' on the log - not a good thing...
by david jenkins
Mon Apr 07, 2008 8:34 pm
Forum: Operation
Topic: Er, it's full of petrol
Replies: 2
Views: 2212

I'd suggest that you fit a small petrol trap - a little air-tight pot with 2 pipes in the lid would be fine. Any petrol would fall into the pot and not get into the MAP sensor. If you can find the right sort of pot, you could unscrew the base and empty it now and then. I'd also consider putting the ...