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light pop from exhaust during pull
Posted: Tue Sep 23, 2008 2:38 pm
by ultra spikey
When I was doing some street tuning in 3rd, I would randomly hear this faint popping sound coming from the exhaust. It would pop like 2-4 times during the pull(really lightly). The car didnt see to slow down at all, and everything looked good in the datalog. Anyone have any experience with this?
Posted: Tue Sep 23, 2008 7:09 pm
by calvin
during a pull? spark blowing out?
Posted: Tue Sep 23, 2008 9:55 pm
by Garrett
take a look on your datalog for the fuel cut post a datalog here
Posted: Wed Sep 24, 2008 1:42 am
by sewell94
sounds like either you need to gap your plugs down or your ign timing is retarded alittle to much.
Posted: Wed Sep 24, 2008 2:10 am
by ultra spikey
sewell94 wrote:sounds like either you need to gap your plugs down or your ign timing is retarded alittle to much.
I tried .028 and .026 gap, I may try even smaller. Also, the timing is about 13* @ 14psi. Here is a log...
Posted: Thu Sep 25, 2008 3:29 am
by Bugermass
gap them babies to .020 and call it a day

Posted: Fri Sep 26, 2008 3:29 pm
by 98vtec
just something stupid i noticed, but you need to calibrate your TPS. also noticed that you are running very very little timing. Your actual ignition timing was 12.5 at 5psi of boost. Also, your ramping ignition (vaccuum) is very very very conservative and could be contributing to your feeling of boost lag you were mentioning in your dyno thread. read them plugs and add timing!!!
Posted: Fri Sep 26, 2008 6:37 pm
by ultra spikey
98vtec wrote:just something stupid i noticed, but you need to calibrate your TPS. also noticed that you are running very very little timing. Your actual ignition timing was 12.5 at 5psi of boost. Also, your ramping ignition (vaccuum) is very very very conservative and could be contributing to your feeling of boost lag you were mentioning in your dyno thread. read them plugs and add timing!!!
12.5 at 5psi? My log does not read that...hmm...on the log i posted in this thread(timing not touched) it reads ~22* @ 5psi, and ~13* @ 14psi. On my finished tune, at ~26* @ 5psi, and ~18* @14psi.
Posted: Fri Sep 26, 2008 11:17 pm
by 98vtec
ultra spikey wrote:98vtec wrote:just something stupid i noticed, but you need to calibrate your TPS. also noticed that you are running very very little timing. Your actual ignition timing was 12.5 at 5psi of boost. Also, your ramping ignition (vaccuum) is very very very conservative and could be contributing to your feeling of boost lag you were mentioning in your dyno thread. read them plugs and add timing!!!
12.5 at 5psi? My log does not read that...hmm...on the log i posted in this thread(timing not touched) it reads ~22* @ 5psi, and ~13* @ 14psi. On my finished tune, at ~26* @ 5psi, and ~18* @14psi.
go to the log you posted in this thread. about 19 seconds into it. Your ignition ramp is retarded A LOT
Posted: Sat Sep 27, 2008 6:27 pm
by ultra spikey
yea...that log was from my untuned run, now that it's tuned, i bumped the timing up about 5*.