Did you do the throttle re-learn procedure after cleaning the throttle bodies? It will do that if you dont have it relearn.rjkoop wrote: ↑Tue Dec 08, 2020 4:23 pmThrottle body cleaned. No change. Argh! Guess I'll look for a vacuum leak. It only has 54,000kms. Not sure what else is easy to check.
Once again, cold starts and idles fine. Warm start... sometimes RPMs go up and then down below idle and stalls. Only about every 1 in 5 times.
Richard
WOW!!!VStar650CL wrote: ↑Tue Dec 08, 2020 4:47 pmI've seen before-after differences in indicated airflow of as much as 30% on 5-10 year old cars that never had IAVL since the factory.
Yah, what a little proper experimentation will reveal. Our own '13 Altima was a perfect instance, we bought it with 63K in '16 and it was serviced at a different dealership, records were good but showed no engine work ever. Average mileage in the cluster was horrible for an Altima, just 21 at an average 35 mph. Before-and-after MAF was 23%, average mpg went from 21 to 26.5 at about the same average speeds. That's why milspec (the purchasing code for military products) generally insists on "aged" silicon. Stuff in the electron-world changes just from being used.
I'll try it again for good measure. But the check engine light flashed when it was supposed to, went solid, etc...
If it's unmetered air then your scanner can tell you. Look at the fuel trim at idle and then at 2000+ RPM. If it's enriching at idle but normalizes at higher R's, the culprit is a small leak. If you don't see any big changes, then don't waste time on leak-hunting, the problem is something else.
Strange. Should be public.PapaSmurf2k3 wrote: ↑Fri Dec 11, 2020 2:35 pmHey Richard it looks like the images to your google drive don't like to post here... maybe some kind of privacy issue.
Your attached image works well though. Any chance you could do the same for your google drive images?
Wow... You're relentless! I'm always amazed at how people I've never met spend the time to help strangers out. Thank you!VStar650CL wrote: ↑Fri Dec 11, 2020 3:00 pmPic came through okay here, weird. The STFT you see there is Short Term Fuel Trim, and +8.6% is pretty enriched for 2K with no load. So if it's a vacuum leak it's a big one and not small (if it's a leak at all, which seems doubtful). That also leaves out the IAT, 26C is perfectly normal. I'll have to think about this, we've gone through all the most likely stuff.
I found the STFT level was steady at idle. But when rev'ing the engine there was a range from 6.5% to 10%. Tough to keep it steady when my foot was on the pedal.VStar650CL wrote: ↑Fri Dec 11, 2020 3:00 pmPic came through okay here, weird. The STFT you see there is Short Term Fuel Trim, and +8.6% is pretty enriched for 2K with no load. So if it's a vacuum leak it's a big one and not small (if it's a leak at all, which seems doubtful). That also leaves out the IAT, 26C is perfectly normal. I'll have to think about this, we've gone through all the most likely stuff.