Logging injectors with hptuners
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Logging injectors with hptuners Is there a way to log injectors individually, or only the default bank to bank? I'm trying to learn how to tune, and my car feels like it has a bad miss when I give it throttle (idles bad too). I just changed plugs and a few of them looked brand new, where the others were fouled. My coils are firing, so I was wondering about the injectors.
Bank-bank control means the injectors all get the same
electrical pulse width. You can do an injector balance
test, and you can look at cylinder mode misfires to chase
individual injector problems, swap the suspicious ones with
good ones and see if the signature moves with.
electrical pulse width. You can do an injector balance
test, and you can look at cylinder mode misfires to chase
individual injector problems, swap the suspicious ones with
good ones and see if the signature moves with.
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How do I do the balance test, and where do I find the cylinder mode misfires? I don't have any misfire dtc's.
I see a cylinder balance...is that what you are talking about?
I see a cylinder balance...is that what you are talking about?
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For some reason that file doesn't work. I think it is because when I closed hptuners it said something had changed and asked me to save and I clicked no. I did take a screen shot though...so here it is. Well I can't make the image small enough to upload and still be visible, so I'll copy the info.
RPM Ref: 1084 Idle (IAC) Control
#1: 978-90% RPM 1000
#2: 864-79%
#3: 850-78% Steps 17
#4: 982-90%
#5: 993-91%
#6: 994-91%
#7: 840-77%
#8: 785-72%
RPM Ref: 1084 Idle (IAC) Control
#1: 978-90% RPM 1000
#2: 864-79%
#3: 850-78% Steps 17
#4: 982-90%
#5: 993-91%
#6: 994-91%
#7: 840-77%
#8: 785-72%
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From: Kingsland, GA
I was wrong, not all the cylinders with the 70s% had the clean plugs...it was a mix between them all.
Could a vacuum leak cause this? Like if one or more of the intake runners were not properly seated?
Could a vacuum leak cause this? Like if one or more of the intake runners were not properly seated?
There's something lumpy in the gravy but it appears not to be
a clean, bank-to-bank problem.
For misfires, you just want to log the Misfire Current Cylinder
1,2,3,...,8 and look at whether any of them stand out at idle
or low cruise or accelerating. Not so much the absolute number
as whether one or four of the cylinders are unusual.
Though if this has been going on long, maybe all clean plugs
is not a bad idea. Depends on whether they are "dirty" or
fouled enough to cause their own set of problems, whether or
not they were the initial trouble.
Four vacuum leaks on nonadjacent cylinders seems kind of
unlikely. But you can get some crazy trimming with only one
runner leak, and then over-enrich everybody else to "fix it".
a clean, bank-to-bank problem.
For misfires, you just want to log the Misfire Current Cylinder
1,2,3,...,8 and look at whether any of them stand out at idle
or low cruise or accelerating. Not so much the absolute number
as whether one or four of the cylinders are unusual.
Though if this has been going on long, maybe all clean plugs
is not a bad idea. Depends on whether they are "dirty" or
fouled enough to cause their own set of problems, whether or
not they were the initial trouble.
Four vacuum leaks on nonadjacent cylinders seems kind of
unlikely. But you can get some crazy trimming with only one
runner leak, and then over-enrich everybody else to "fix it".
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From: Kingsland, GA
I thought a vacuum leak was kind of unlikely...at least for my problem. This is a conversion car that I have been working on for a while, so these have been the only times it has run.
How do you log cylinder misfires individually? I don't have any misfire codes, but when I give it gas, it sure does feel like there is a cylinder or two off. But then again, around 4k it doesn't seem bad.
And I put fresh plugs in it...problem still persists. I'm thinking about taking out my injectors and cleaning them. Can't hurt.
How do you log cylinder misfires individually? I don't have any misfire codes, but when I give it gas, it sure does feel like there is a cylinder or two off. But then again, around 4k it doesn't seem bad.
And I put fresh plugs in it...problem still persists. I'm thinking about taking out my injectors and cleaning them. Can't hurt.
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to log cylinder misfires individually:
open up the table display that shows all the PIDs you're logging,
right click, insert: engine diagnostics -> misfire -> misfire current cylinder #
it'll use up 8 PIDs
after you drive around doing stuff that makes you think you have a misfire, save the log, but also "Export Data" (found under Scan in the toolbar). that will drop an excel file that you can work with.
i did this and found a miss that didn't trigger a code or that i couldn't feel - turned out a spark plug wire was loosening up.
open up the table display that shows all the PIDs you're logging,
right click, insert: engine diagnostics -> misfire -> misfire current cylinder #
it'll use up 8 PIDs
after you drive around doing stuff that makes you think you have a misfire, save the log, but also "Export Data" (found under Scan in the toolbar). that will drop an excel file that you can work with.
i did this and found a miss that didn't trigger a code or that i couldn't feel - turned out a spark plug wire was loosening up.
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I think I found my problem...at least a huge part of it. I took all my injectors out to clean them. A few were kind of dirty/clogged, but two of them were completely stuck shut. So I cleaned them all out and hopefully that will fix my problem. I'll have to wait until next week to do it though...fingers crossed.
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It's amazing what clean injectors will do for a car. Once it built up fuel pressure and decided to start it runs great (at least as great as a semi-half *** tuned cammed car runs). Everything seems okay...no misses or anything.
Would someone mind looking at my scan to see if everything looks okay or if I missed anything.
Thanks for everyones help!
Would someone mind looking at my scan to see if everything looks okay or if I missed anything.
Thanks for everyones help!
