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Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


 
 
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Old 01-19-2013, 08:33 PM   #1
l2u4k0assx
 
Join Date: Jul 2008
Location: Eastern North Carolina
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RB25 acting like a dumb blonde

Ok so i have a RB25DET Series 2. Ran beautiful for months and then the alt. took a crap on me. So i had a brilliant idea to take everything out and do all the necessary things while i had the engine and tranny out. I had the regular side mount and stock exhaust from the ka single cam. After 5 months of getting everything together and ready to put back in. the CEL and the same lights indicating the alt is bad show up right before you turn the engine over. while the engine is running it idles right where it belongs vacuum is at -20. So here's where the problems start

Problems-
when revving the engine the idle starts to bog all the way down to the point of dyeing
while i drive it and keep it a 3000rpm it will bog down like some sort of fuel cut
After revving the idle is inconsistent.
when i touch the injector wiring idle becomes a little erratic
starting to backfire like crazy as well


Solutions i have tried- the unplug method
TPS
coils
injectors
MAF
Also sprayed brake cleaner around any spot for vacuum leaks no changes in idle



Parts upgraded-
nissan quest alternator
90mm throttle body
Sard FPR
gt30 turbo- possibly bad, oil comes out of exhaust yet still builds boost.
modified stock turbo manifold w/ tial wastegate 8.9lb spring
freddy intake manifold
custom downpipe
front mount added

here is video
Jan 8, 2013 7:11pm | Facebook

Any help and i will greatly appreciate it. Thank you
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240 240sx s13, rb25



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