Spikes in engine data when using software MBE Tool...
Discussion
I wonder if anyone can give feedback on this video, all values: water& air temp, ignition, RPM, Throttle %, Lambda V, adaptive %, inj.Duration all seem to spike occasionally, any ideas why, is this normal?
I currently have 2 issues, high idle speed when warm (1700-2400rpm) currently looking into the throttle pots being faulty, and high lambda reading of 1.7 (should be around 1) in it's MOT, I'm looking into air leaks fr this issue.
I currently have 2 issues, high idle speed when warm (1700-2400rpm) currently looking into the throttle pots being faulty, and high lambda reading of 1.7 (should be around 1) in it's MOT, I'm looking into air leaks fr this issue.
notaping said:
It looks like your battery voltage is spiking up to 20V. This will mess up everything. I had similar in the past and it was the alternator regulator/rectifier breaking down.
Worth removing the alternator and getting it bench tested by an auto leccy.
Arrrh ok, thanks Notaping, you're always quick to respond to my diagnostics woes, thanks mateWorth removing the alternator and getting it bench tested by an auto leccy.
No probs Modrich. If the MBE Tool has a logging feature - it might be worth making a quick log and then viewing it in Excel or similar. Makes it easier to confirm that the spikes all line up.
I have the opposite just now that when the cooling fans turn on at idle - the voltage drops to 10.8v. That really messes up engine running and the idle drops by 200rpm.
I recon everything in these cars is very sensitive to the correct voltage - and why not!
I have the opposite just now that when the cooling fans turn on at idle - the voltage drops to 10.8v. That really messes up engine running and the idle drops by 200rpm.
I recon everything in these cars is very sensitive to the correct voltage - and why not!
Hi Modrich, sorry for the misdirection - I think EvoOlli is correct that everything you're seeing is probably just a comms error. I was being thrown off by your other post with the image of the Sun Diagnostic programme & a Lambda of 1.7. I take it that must be the MOT testers probe voltage and NOT from your car's Lambdas, since I can't see how that software could wire into the car's system.
If that's the case, and you car's been off the road for a while during resto' - You might just be chasing red herrings. Maybe just take the car for a good blast to let it settle. Also, if it hasn't been run for a while - there's a good chance that all the stored adaptive values are gone and taking it a run will allow those to repopulate. That should help with the AFR and might get you through the MOT. As for the creeping high idle - I've no experience of SP6's I'm afraid but I have just watched a Harry's Garage where he had a very high idle on a Ferrari - turned out to be the carpet resting on the pedal
. Maybe worth a quick check of the cable and pedal to make sure nothing's interfering with it. Could be as simple as that!
By the way - your car looks fantastic. You must be very pleased with it.
If that's the case, and you car's been off the road for a while during resto' - You might just be chasing red herrings. Maybe just take the car for a good blast to let it settle. Also, if it hasn't been run for a while - there's a good chance that all the stored adaptive values are gone and taking it a run will allow those to repopulate. That should help with the AFR and might get you through the MOT. As for the creeping high idle - I've no experience of SP6's I'm afraid but I have just watched a Harry's Garage where he had a very high idle on a Ferrari - turned out to be the carpet resting on the pedal
. Maybe worth a quick check of the cable and pedal to make sure nothing's interfering with it. Could be as simple as that!By the way - your car looks fantastic. You must be very pleased with it.
Hi notaping, yes, the 1.7 figure is from the MOT exhaust gas analyser, not the voltage reading. Sorry for the confusion.
I have and old lead off ebay, I can try another laptop. I was also going to make my own adapter using an RS232 to TTL level adapter board I've bought.
Over the process of the restoration, I’ve fitted a new Dallas chip in the ECU and when running the car before it's MOT I cleared the adaptives and reset the throttles, it ran like a bag of spanners afterwards sounding like it was when revving misfiring but as it warmed began to improve, but the problem with high idle developed so I'm looking into throttle pot/TPS sensor replacement. I've also decided to remove and strip the throttle bodies, make up new TB>head gaskets and check how bad the spindles are leaking, get bearings fitted if they're needed as air leaks can also cause high lambda readings.
Hopefully then I can take it for a run before the MOT re-sit and pass with flying colours
I have and old lead off ebay, I can try another laptop. I was also going to make my own adapter using an RS232 to TTL level adapter board I've bought.
Over the process of the restoration, I’ve fitted a new Dallas chip in the ECU and when running the car before it's MOT I cleared the adaptives and reset the throttles, it ran like a bag of spanners afterwards sounding like it was when revving misfiring but as it warmed began to improve, but the problem with high idle developed so I'm looking into throttle pot/TPS sensor replacement. I've also decided to remove and strip the throttle bodies, make up new TB>head gaskets and check how bad the spindles are leaking, get bearings fitted if they're needed as air leaks can also cause high lambda readings.
Hopefully then I can take it for a run before the MOT re-sit and pass with flying colours
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