light pop from exhaust during pull

ultra spikey · Post by **ultra spikey** » Tue Sep 23, 2008 2:38 pm

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?

Post by **calvin** » Tue Sep 23, 2008 7:09 pm

during a pull? spark blowing out?

Garrett · Post by **Garrett** » Tue Sep 23, 2008 9:55 pm

take a look on your datalog for the fuel cut post a datalog here

sewell94 · Post by **sewell94** » Wed Sep 24, 2008 1:42 am

sounds like either you need to gap your plugs down or your ign timing is retarded alittle to much.

ultra spikey · Post by **ultra spikey** » Wed Sep 24, 2008 2:10 am

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...

Post by **Bugermass** » Thu Sep 25, 2008 3:29 am

gap them babies to .020 and call it a day

98vtec · Post by **98vtec** » Fri Sep 26, 2008 3:29 pm

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!!!

ultra spikey · Post by **ultra spikey** » Fri Sep 26, 2008 6:37 pm

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.

98vtec · Post by **98vtec** » Fri Sep 26, 2008 11:17 pm

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

ultra spikey · Post by **ultra spikey** » Sat Sep 27, 2008 6:27 pm

yea...that log was from my untuned run, now that it's tuned, i bumped the timing up about 5*.