engine troubles

[SD9K]

hi therei drive thisi've been hvaing engine troubles this past weekand i just can't put my finger on what's causing it

at around 4500rpms my car feels like it is dogging hardand the dyno chart shows it



my current mods for my r33 are..safc neoupgraded stock t3 (bored out stock compressor housing w/ a bigger wheel, t3 exhaust housing)perrin manual boost controller (16psi on the dyno chart)greddy fmicsard fprand denso plugs (step colder than stock)

as you can see the car is pretty much stockand any input would be greatthe car was running fine at stock powerand after the tune it's just been horrid

[Darius]

Sounds like your tune has a hole in it

What are the AFRs in the "dip" in the power graph?

[eh?]

Get a standalone ecu...

[SD9K]

Sounds like your tune has a hole in it

What are the AFRs in the "dip" in the power graph?

i think the graph says like 13 but it's pretty even across the entire powerband

[SD9K]

[Cjmartz2k]

Damn dude, your going way lean. The leanest most people run turbo stuff is around 12.1 to 1. Either the tune sucked (which is what I'm guessing), or you are running out of fuel pump or injectors. Who tuned it?

[SD9K]

ya this shop called OSR in hisperia, cathey usually so a really good jobbut this time was like wtfi get to the track for a a demo practice and it just ran like total ****they even came down and tried helping me out(by taking out fuel lol)and it started to run alot betterso obviously it's just too leanhope to get everything settled by friday in time for the demo saturday night