Elanscan check

[alexg]

Hi,

I would appreciate it if someone could check this elanscan log. I'm running the mountain chip switcher on kilimanjaro so should get 0.8 bar but I only get 0.75.
Also it looks like the thermostat is kicking in at the wrong temp. Are there any other issues that I should be looking for or fixing.

Thanks in advance

Alex

[saska]

I would appreciate it if someone could check this elanscan log. I'm running the mountain chip switcher on kilimanjaro so should get 0.8 bar but I only get 0.75.
Also it looks like the thermostat is kicking in at the wrong temp. Are there any other issues that I should be looking for or fixing.

Bit of a srange one this. The scan starts out reporting a PromID of 1499, then at 176secs changes to 399, then at 506secs changes to 299. Don't think the 299/399 prom id is too strange as I seem to recall GUK and AlanC reporting this with a switcher. Just think it strange it changes during the run. Did you switch programs at any time during the run?
There are 100,000 faults of prom error which I think GUK & AlanC also reported with the switcher but didn't get the CEL.
The O2/CO potentiometer doesn't appear to kick in and start working until 240secs, after which it bounces nicely between 0 and 4.2V
It doesn't enter Closed Loop mode until 189 secs (Flag 42 Bit 0)
The idle appears to be too high at 1100RPM. (See Tickover)
The max boost achieved was 0.73 Bar. Reasons for not making expected boost (from ESM's web site):
1. The TPS may be faulty or maladjusted (Don't think this is likely as the scan shows both 0 & 100%)
2. The throttle cable may be maladjusted (Again not likely)
3. Exhaust back-pressure
4. A leak in the intake track (See JonT's ingenious test rig)
5. Bad spark plugs (gap to big, fouled or otherwise faulty)
6. Another pre-existing fault
I'd agree about the temp being too low. Looks as though the thermostat is stuck open or opening too soon.
Other notes on the scan:
Secondary throttle and EGR valve are working.
Wastegate duty cycle shows 82% which is as high as I've seen so probably OK
There are 3 knock events -- ar the first (397 secs) 1.6°of spark retard was applied -- the other 2 got nothing applied.

[alexg]

Hi Tony,

Thanks very much for the analysis, yes I did change the switcher as I started off in standard and actually wanted to be in prog 2. Then switched to 3 at the end to see if boost changed.

I will go through the list and check each item but most likely is a vaccum leak for the idle and a intake leak for the boost. most of the other items have been looked at or checked. I've adjusted the throttle cable, put in new spark plugs, cleaned out the IAC valve. As the car has a 2.25 piper exahaust with sport cat and pre-cat eliminator I doubt there is an issue with back preasure. Is it possible the thermostat opening early so that the car is running at ~73 rather than 83 degrees will have an impact on idle and boost etc?
I assume that 82% wastegate cycle means that the wastegate is open as the boost is at target.

Just one last question for the future, how did you interpret that the Secondary throttle and EGR valve are working from the scan?

Thanks again for your time

Alex

[GeoffSmith]

Late to this but Tony seems to have had a good look at it and I would suspect you've got the wrong thermostat.

Is it possible the thermostat opening early so that the car is running at ~73 rather than 83 degrees will have an impact on idle and boost etc?

Yes, if you plot target idle against coolant temperature, you'll find that the idle doesn't get down to 950RPM until the temperature reaches 80°C. Boost is also reduced at lower temperature (but I'm not exactly sure how much).

Just one last question for the future, how did you interpret that the Secondary throttle and EGR valve are working from the scan?

Look at flag 12:bits 1 &5.

[saska]

Boost is also reduced at lower temperature (but I'm not exactly sure how much).

Boost is limited to 0.5Bar when engine temp is below 50°C