Hawkeye - Is it up to the task? Reset of adaptive values

2959 Views 5 Replies 3 Participants Last post by AMcK, Oct 7, 2009

996TURBO

Discussion Starter · Sep 14, 2009

This question is for those who really know this stuff and not for concurrents. :shhh:

From what i read, you can read and reset DTC like with any OBD2 reader,read live datas too but i never read about adaptive values.

It's the only reason i need another stuff than my OBD2 reader.

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RRToadHall

· #2 · Sep 14, 2009

:think: Unless you are changing a sensor or rebuilding your engine why would you need to reset adptives? Adaptive values are ... well, adaptive. From what I ahve been told, and from experience, they only need to be fiddled with after a major rebuild where a sensor may have changed adjustment during a reinstall or after changing a sensor. After enough miles things will be relearned in your ECU.

My first reset was after changing fuel injectors, cleaning MAF, and changing O2s. The combination made a huge increase in my MPG. I have reset a couple times since with little or no difference.

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996TURBO

Discussion Starter · #3 · Sep 15, 2009

rrtoadhall said:
:think: Unless you are changing a sensor or rebuilding your engine why would you need to reset adptives? Adaptive values are ... well, adaptive. From what I ahve been told, and from experience, they only need to be fiddled with after a major rebuild where a sensor may have changed adjustment during a reinstall or after changing a sensor. After enough miles things will be relearned in your ECU.

My first reset was after changing fuel injectors, cleaning MAF, and changing O2s. The combination made a huge increase in my MPG. I have reset a couple times since with little or no difference.

In fact, i really like to clean at each service items like MAF.
Another reason is that i have a single point LPG install. Believe me when i reset, i can see the difference and even smell it. That thing richen to the max the fuel with this setup and since i do not have Cats, it fumes black like a chipped diesel.

Ok i know i should change it but since i'm not confident enough to swap a front end kit only, i'm not ready to spend something like 2500 GBP on a old rig for a newer install. If i want performance or economy, i can buy another car for this amount.
I saw cool XJR with RHD for ridiculous prices

(from 3000 GBP to 6000) and i have a twingo 94 for economy and city bumper to bumper parks.

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AMcK

· #4 · Oct 7, 2009

Hi 996Turbo.

As you say your best bet is updating front end to full sequential. You should get better mpg, more power (not being strangled by lpg venturi) and adaptive values won't be affected if set up correctly.
I updated the front end of the lpg kit on my wife's RR. It really isn't that hard and the kit cost me £800, but you can get cheaper (about £500) and I would choose one of these if doing again. As long as you feel competent in removing the inlet manifold and drilling and tapping some holes in it you should have no problems with the install. The only wiring needed is to interrupt each petrol injector wiring, but for this you can usually get specific loom with correct Bosch connectors - that means you simply unplug the original injector connector, plug in to the lpg loom and then the lpg loom to the petrol injector. An rpm pick up and a fused live and earth connection.

So go on for the price of a diagnostic kit you can upgrade to the latest lpg system.

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996TURBO

Discussion Starter · #5 · Oct 7, 2009

AMcK said:
Hi 996Turbo.

As you say your best bet is updating front end to full sequential. You should get better mpg, more power (not being strangled by lpg venturi) and adaptive values won't be affected if set up correctly.
I updated the front end of the lpg kit on my wife's RR. It really isn't that hard and the kit cost me £800, but you can get cheaper (about £500) and I would choose one of these if doing again. As long as you feel competent in removing the inlet manifold and drilling and tapping some holes in it you should have no problems with the install. The only wiring needed is to interrupt each petrol injector wiring, but for this you can usually get specific loom with correct Bosch connectors - that means you simply unplug the original injector connector, plug in to the lpg loom and then the lpg loom to the petrol injector. An rpm pick up and a fused live and earth connection.

So go on for the price of a diagnostic kit you can upgrade to the latest lpg system.

Thanks for your imput.
My main worry is about if my LPG tank isn't compatible with front end kit.
BTW, i bought a T1 Testbook for just a few more bucks than an Faultmate limited to 1 vehicle.

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AMcK

· #6 · Oct 7, 2009

My main worry is about if my LPG tank isn't compatible with front end kit.
BTW, i bought a T1 Testbook for just a few more bucks than an Faultmate limited to 1 vehicle.

There will be no problems with the tanks. The only thing will be the copper supply pipe from the tank could be 6 or 8mm - most are 6mm, but you can get 8 - 6mm adapters. The other thing is the level gauge - there are different makes of these, but you just tell the software for your new lpg ecu which one it has and if necessary what voltage value relates to full, 3/4, 1/2 full etc. Finally there will be a solenoid, but again these are all interchangeable. The only thing to consider is if the new vaporiser will fit in same position as old ie current pipe will be long enough. I got around this by fitting the front solenoid/filter where the pipe finished and then a short length of pipe to the new vap position. I found it made a real difference to the way it drove.

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