Simtek Detecting DET? or Software Problem
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From: The Fabulist Hunter
if the rev counter is not working it will probably assuming you are in 5th (less rpm to speed signals for 5th) and the shift light is probably set to 0rpm (dissabled) in 5th and therefore it illuminates the cel light.. possibly an issue with the rev counter?
Simon
Simon
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SimTek Performance Engine Management
Available now:
NOS maps
Post restrictor depression closed loop boost control
Closed loop ALS by EGT control
Available now:
NOS maps
Post restrictor depression closed loop boost control
Closed loop ALS by EGT control
The logic in going to a "warning" rather than a "control" strategy was that, unless you develop a fully adaptive ECU (as in the new age cars), you always are left with the problem of how and when do you reinstate the ignition timing that has been removed without then consistently repeating the det condition.Assuming that the car was mapped correctly originally, then you need to remove the root cause of the det before reinstating the timing.For this reason we felt that a warning system was safer, and even with a "control" system in place we would intend to retain the "warning" system.
You could argue that the early OEM ecu with a limited "control" strategy and no warning gives rise to the very problem I have outlined above.Det is detected and driver is unaware of det > ign reduced for a while > dets again > repeat until engine lets go! We stress to all our customers the significance of the CEL flashing; it is natural that this may be queried once it happens but that must be better than blissful ignorance.
I do take on board your comments Duncan and would only disagree in that I think the SimTek is already "cracking"; it will be "cracking plus" when the next upgrades are released!
Steve S
You could argue that the early OEM ecu with a limited "control" strategy and no warning gives rise to the very problem I have outlined above.Det is detected and driver is unaware of det > ign reduced for a while > dets again > repeat until engine lets go! We stress to all our customers the significance of the CEL flashing; it is natural that this may be queried once it happens but that must be better than blissful ignorance.
I do take on board your comments Duncan and would only disagree in that I think the SimTek is already "cracking"; it will be "cracking plus" when the next upgrades are released!
Steve S
I use the onboard OE knock control and a separate warning system - hopefully both will not fail at once. The newage knock control is particularly good IMO (although it sometimes it detects spurious knock) and I think to downgrade from this to a knock warning system for a non-competition car is removing from the ability to just drive the car.
Would a separate Det warning light be possible to separate a flashing CEL being confused with a gear change warning/other issues?
A knock counter and a failback/failsafe offset map would be a simple way to add some protection without having to resort to fully adaptive strategies. This could be reset manually once investigated/solved/dismissed but it would add an extra level of safety.
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Yes, that is easily implemented.Now where's Andy L's phone number....
We can retard across the full map,across only part or even on individual cylinders as the det detection is cylinder specific.
Separate warnings would depend on having spare pins on the board, but I guess thats not insurmountable.
Thanks for your ideas.
Steve
We can retard across the full map,across only part or even on individual cylinders as the det detection is cylinder specific.
Separate warnings would depend on having spare pins on the board, but I guess thats not insurmountable.
Thanks for your ideas.
Steve
Yes, that is easily implemented.Now where's Andy L's phone number....
We can retard across the full map,across only part or even on individual cylinders as the det detection is cylinder specific.
Separate warnings would depend on having spare pins on the board, but I guess thats not insurmountable.
Thanks for your ideas.
Steve
We can retard across the full map,across only part or even on individual cylinders as the det detection is cylinder specific.
Separate warnings would depend on having spare pins on the board, but I guess thats not insurmountable.
Thanks for your ideas.
Steve
If it could richen and retard by a configurable amount it should assist and keep the CEL light on in a permanent state until reset.
Hopefully at some point there will be a DBW option so I can evaluate this myself......
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From: ECU Mapping - www.JollyGreenMonster.co.uk
Yes, that is easily implemented.Now where's Andy L's phone number....
We can retard across the full map,across only part or even on individual cylinders as the det detection is cylinder specific.
Separate warnings would depend on having spare pins on the board, but I guess thats not insurmountable.
Thanks for your ideas.
Steve
We can retard across the full map,across only part or even on individual cylinders as the det detection is cylinder specific.
Separate warnings would depend on having spare pins on the board, but I guess thats not insurmountable.
Thanks for your ideas.
Steve
the retard area coiuld be linked to the detection load settings etc..
Simon
From the Simtek website...
"Knock Warning
The ECU uses the OEM Knock Sensor to listen for ‘Knock’. This is then fed to a Digital Signal Processor for analysis. If the DSP decides that knock is detected, the Check Engine Light will be flashed to give the driver warning that engine damage could be occurring. Optionally the ECU can be configured to take corrective action in an effort to avoid damage"
Am I missiing something here?
Can the above in red be explained in light of this thread? (Or is it simply referring to a possible future firmware upgrade that Steve eludes to? )
"Knock Warning
The ECU uses the OEM Knock Sensor to listen for ‘Knock’. This is then fed to a Digital Signal Processor for analysis. If the DSP decides that knock is detected, the Check Engine Light will be flashed to give the driver warning that engine damage could be occurring. Optionally the ECU can be configured to take corrective action in an effort to avoid damage"
Am I missiing something here?
Can the above in red be explained in light of this thread? (Or is it simply referring to a possible future firmware upgrade that Steve eludes to? )
Last edited by joz8968; Nov 30, 2008 at 04:24 PM.
..
From the Simtek website...
"Knock Warning
The ECU uses the OEM Knock Sensor to listen for ‘Knock’. This is then fed to a Digital Signal Processor for analysis. If the DSP decides that knock is detected, the Check Engine Light will be flashed to give the driver warning that engine damage could be occurring. Optionally the ECU can be configured to take corrective action in an effort to avoid damage"
Am I missiing something here? Can the above in red be explained in light of this thread? (Or is it simply referring to a possible future firmware upgrade that Steve eludes to? )
"Knock Warning
The ECU uses the OEM Knock Sensor to listen for ‘Knock’. This is then fed to a Digital Signal Processor for analysis. If the DSP decides that knock is detected, the Check Engine Light will be flashed to give the driver warning that engine damage could be occurring. Optionally the ECU can be configured to take corrective action in an effort to avoid damage"
Am I missiing something here?
Can the above in red be explained in light of this thread? (Or is it simply referring to a possible future firmware upgrade that Steve eludes to? )Good question, so does it pull timing or not
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It refers to the option to switch to Map 2 which can be set for a lower octane fuel.I usually set Map 1 as the prefered fuel that the owner uses and have map 2 with 4 to 5 degrees of retard in the positive boost load sites.
.It was a little ambiguous as - to me at least
- "Optionally the ECU can be configured to take corrective action in an effort to avoid damage" read like an 'active knock strategy' (e.g. like the OEM's IAM feature)Cheers for clearing that up though, Steve.
Last edited by joz8968; Nov 30, 2008 at 06:59 PM.
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From: Northamptonshire
Mine did this at 4250 revs after filling up with fuel. Pre-fill up not a flicker, post-fill up the light went mad in any gear with any boost. Unfortunately I had just filled up for a track day which ruined things a bit - having to change gear at 4200 revs mid corner on a damp silverstone was quite exciting.
In the same way the Solaris or Apexi d-jet can be adapted to fit an early evo with harness and trigger wheel, do you think this would be something that would be possible with the simtek?
I understand there isn't a massive difference between generations (with regards to ecu's) pin-outs and plug design almost sure to be though, the harnesses off the 5-6 can be used for the 1-3 so i'm hopefull this might be possible?
Any thoughts on that?
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