Unknown boost cut

s300 and SManager software questions & answers
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L_S_i
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Joined: Tue Feb 19, 2008 8:43 am

Unknown boost cut

Post by L_S_i »

Hi guys Im having this weird boost cut out of nowhere , on vtec it doesnt do it, only on low cam. Ill attach map and log.
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ivo boost cut.s3d
(431.29 KiB) Downloaded 130 times
ivo base___v3.skl
(39.23 KiB) Downloaded 115 times
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Spunkster
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Re: Unknown boost cut

Post by Spunkster »

What version of software are you using from Help, About?
L_S_i
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Re: Unknown boost cut

Post by L_S_i »

Latest. 2.3.7
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Spunkster
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Re: Unknown boost cut

Post by Spunkster »

The datalog you have uploaded does not appear to have been created with that version.
L_S_i
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Re: Unknown boost cut

Post by L_S_i »

Well it was in fact created with this last version. Just instaled it in the morning and started mapping/logging with it.
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Spunkster
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Re: Unknown boost cut

Post by Spunkster »

If you open this datalog you will see that all values are flat lined and it is not showing proper data. It is also saying that it needs to convert the datalog because it was created using a previous version of software.
L_S_i
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Re: Unknown boost cut

Post by L_S_i »

Dont make sense at all. Just instaled 2.3.7 on another desktop and opened the same file and datalog. Shows all the data. Can you please make sure or elaborate cause i can see al the data as we speak in this other computer. The car/ecu boost cuts only on low cam partial or full throttle at around 2-4 psi. On high cam no trouble at all.
L_S_i
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Joined: Tue Feb 19, 2008 8:43 am

Re: Unknown boost cut

Post by L_S_i »

Here´s another file and log on 2.3.7. Still acting...sometime boost cutting at 2-3 psi sometimes at 9. Again i see the log perfectly with all the data.
Attachments
ivo boost cut2.s3d
(590.1 KiB) Downloaded 131 times
ivo base___v4.skl
(39.15 KiB) Downloaded 118 times
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Hondata
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Re: Unknown boost cut

Post by Hondata »

The boost cut seems related to 4500 rpm (VTEC point).
Can you test these things, one at a time:
- disabling launch control
- setting the rev limit type to fuel only
- changing the VTEC point from 4500 rpm to 5000 rpm to see if the cut changes as well
The check engine light shows as on the whole time too, which is not normal. If you datalog immediately after startup, is the check engine light on?
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L_S_i
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Re: Unknown boost cut

Post by L_S_i »

Found the issue , thanks. The car doesn't have its original gauges and someone did a wiring conversion from a civic mb6 to a eg. Checking the log over and over i found the MIL was on through the datalog as smanager wasn't throwing any error code. So found out that somewhere on the harness the service conector was grounded so just unplugged the pin for it on the ecu and the MIL went off as expected. That sorted the issue. Thanks for the help. A sugestion for S manager btw would be some sort of highlight for the MIL even when there isn't a error code present. Thanks again
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Hondata
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Re: Unknown boost cut

Post by Hondata »

Glad you got the problem fixed, thanks for the update.
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L_S_i
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Re: Unknown boost cut

Post by L_S_i »

Thank you for the help
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