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07-04-2014
Hey i am trying to figure out why im getting such low timing. How do people see 18* with a 3.4 gen3 or 3.6 gen5?
My a/f is 10.5-11.0 wot boost is around 10-11 and im seeing like 11-13*. Kr sometimes hits 1-2 at shifts or 3rd gear.
Seems like something isnt right and i should be able to get more out of this car.
Im also noticing latly the car randomly bogs down and up like its falling on its face when cruising at like 2k rpm. Put brand new delphi maf in and same results.
07-04-2014
Is the torque converter not unlocking and that's why it feels dead?
Your fueling shouldn't be in the 10s either.
Your car is stock apart from headers. Not that much to take advantage of. Intercooler or cam would be the only worthwhile mods to look into next. As for why it's not running right, there could be a million and one different reasons.
So when you see 11-13* of timing, do you see any KR as well? If not, that's all that is being commanded. Thank your tuner for that. If you see KR, again, your tuner should have suggested a larger pulley or that your car was in poor mechanical condition and required service before a smaller pulley.
07-04-2014
IIRC we tried more timing and the car knocked like mad.
You were also getting massive part throttle knock, so I backed cruise timing down a bit and it went away.
If you want to bring it down I'll be happy to see if it'll take more timing.
07-04-2014
With stock cam and rockers would see a lot of part throttle kr with agressive cruise timing...I'm sitting on 13* timing wot with my xp header car on 3.3...prob could push it out a little farther but kinda playing it safe for now...stock rockers and cam with 11.7 afr didn't really like much more then 13* would starting getting kr
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07-04-2014
Car is starting to bog down even more. Im kind of thinking fuel pump. When the car bogs my afr go to 17+. I was getting this befor i blew my old trans and replaced it with this 112k junkyard unit including converter. This trans pulls great.
07-05-2014
Fuel pressure gauge would tell you for sure.
07-05-2014
You shouldve never bothered with a tune. with it knocking like that in the first place....get your fueling right and everything will work out for you...
07-05-2014
I didnt really think i had fueling issues at the time. My fuel pressure tester isnt long enough to be able to go for a drive but my fuel pressure at idle is more than perfect. Think ima get a nice electronic one for my empty gauge pod and also upgrade the fuel pump. Anyone have any recommendations for both? Also i want a non venturi seeing im an 04+ right with the returnless system?
07-05-2014
find a long hose for the tester. pop it out the hood, then drive it.
07-05-2014
Have you pulled your plugs yet to verify lean conditions?
07-05-2014
Well called that from a mile away..... Pump just died lol
07-05-2014
well there ya go lol
07-05-2014
When i say a mile. Thats literally. Drove to get a coffee half mile up the road came home and tried to restart and pump was dead rofl
07-05-2014
any apologies to the guy who tuned your car???
07-05-2014
Huh? I wasnt calling Nick out at all..... I was just stating the fact that the car seems like something isnt right mechanically and could probly see alot more timing because of....Originally Posted by Z34Phoenix
On a second note, weirdest **** ever. So i pulled the pump and figured ide put direct power to it to test it and it worked even though the fliters were dirty as ****. So i put it back in and pump still wouldnt turn on so i tested my power wire and noticed that somehow my fuel pump fuse fell out..... How does that happen lol? I have the most random worst luck. But i got a delphi pump coming and ima replace the stock unit anyway looking at those fliters. I tried cleaning them with brake clean but didnt really do ****. Car is still bogging down. Ima pull plugs and check them to see if they are getting fouled because im running 104s and seeing 10-11 afr.
How can i tell if the torque converter is in fact not unlocking? I see there is torque converter slip on my aeroforce but when im scanning it and the car bogs there really isnt any change.
07-07-2014
Ist the fuel pressure supposed to raise when going going wot? Mine drops down to 55 psi. but at idle sits around 60.
07-07-2014
04+ is a set pressure 03 older have a regulator to increase pressure at wot
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07-07-2014
Thankyou. So should it stay at a steady 60-62 psi?
07-07-2014
No because boost works against what the fuel pump is trying to output
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07-07-2014
Or at least that's how u understand it
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