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S13 With Rb25 Not Running Right!

s13_rb25

By s13_rb25,
in General Automotive Discussion

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s13_rb25 Rookie

s13_rb25

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Hey..

I have had this porblem with my car ever since i bought it....was blind to it even having a porblem untill i got into a mates r33 skyline... but anyway.. i own an 1990 s13 with a series 2 rb25 in it..... i know now that it lacks alot of power for what it is.... an im sick of it... i have been in friends cars with the exact same mods an they are unbelivably faster than what my car is....

i have put a bigger fuel pump in it since i bought it because it was still running a non turb'd ca18 pump when i got it.... made some difference.. i fixed several boost leaks... broken exhaust studs.... coilpacks.. sparkplugs.....i have checked everythin i know of.. an i have spent hours on the net looking for solutions...

the easiest way to explain what it does...

you can take off an it will hit boost an u can here it spool but it just wont move untill like 4500...5000 rpm.. if not later....its very rough.. there is no smooth build up to boost or anything... it just makes alot off spool. an then at the last bit of revs left in the gauge it takes off an then u have to change...

please any info would be greatly appreciated...

thanks

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s13_rb25 Rookie

s13_rb25

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every morning when i start it cold... it wont idle that first time unless u give it a rev....then its perfectly fine for the rest of the day..... its not the afm.. becuase when its running... if u unplug it it dies... plug it back in an its fine...

thanks for the reply....

s13_rb25 Rookie

s13_rb25

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so i was fiddling around today... an decided i would move what i think is the cam angle sensor?? the sensor up top which is bolted to front of motor with three bolts... i loosened them off an moved it around an it actually made it run abit better... any ideas. also is there a crnak angle sensor and a cam angle sensor on a series 2 rb25det?

thanks

  • 3 months later...
  • 1 month later...
evoLR32 Newbie

evoLR32

Posted
Posted

so i was fiddling around today... an decided i would move what i think is the cam angle sensor?? the sensor up top which is bolted to front of motor with three bolts... i loosened them off an moved it around an it actually made it run abit better... any ideas. also is there a crnak angle sensor and a cam angle sensor on a series 2 rb25det?

thanks

that sensor that you played around with is the crank angle sensor turning it clockwise advances the gears and anticlockwise it retards it,its just made to adjust the idle

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