RB25 in S13 Hesitation Problem

Discuss the RB20, RB25 and RB26 series engines.
IceSkyline25
Posts: 17
Joined: Sat Apr 29, 2006 1:35 pm
Car: 240sx

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I have an S13 with an RB25.. i just bought the car with the swap already done so i am having to fix problems here and there.. I got the car running but for some reason it feels very sluggish... i know for a fact an RB25 is supposed to pull harder then this.. I have checked for boost leaks and i didnt find ANY.. my BOV isnt leaking either.. The turbo has no shaft play in it whatsoever and it sounds like it is boosting.. My turbo bolts backed off before but now i have them on tight and they arent going anywhere.. It doesnt really sound like there is an exhaust leak.. Ive been trying to also figure out the vacuum diagram but i have a custom intake manifold so its hard getting some accurate diagrams.. also just changed the plugs.. plus i am running 40 PSi of fuel pressure.. i have a cheap **** FAZE boost gauge and it sputters when i hit full boost.. is that because its a peice of **** or because its some type of problem? let me know what you guys think what my problem may be.. i have an event on the 21st that i would love to rip at.. also you guys have any pics of PS on an S13 with an RB25?


180fan
Posts: 7954
Joined: Sat Dec 14, 2002 12:16 pm
Car: 89 fastback

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moved to the rb boards

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midnightsliding
Posts: 915
Joined: Sat Jun 21, 2003 8:48 pm

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are u holding your fuel pressure under WOT? my friends SR did that too and the scren on his fuel pump was clogged hard core..... just a rondom Qestion..do u know anyone around ur area called SL KIDS?

IceSkyline25
Posts: 17
Joined: Sat Apr 29, 2006 1:35 pm
Car: 240sx

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Yeah I do actually Im one of them. Thanx for the info

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midnightsliding
Posts: 915
Joined: Sat Jun 21, 2003 8:48 pm

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i figured ur where b/c ameen said he could beat u and i was like somthing must wrong with the car.

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Shocker
Posts: 2082
Joined: Sun Aug 01, 2004 2:40 pm
Car: 89 240sxHB rb26/30

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timing my man. 15 degrees +- 1 degree.. definitally sounds like your problem.

IceSkyline25
Posts: 17
Joined: Sat Apr 29, 2006 1:35 pm
Car: 240sx

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yeah thanx for all the info and yes it was a timing problem and alittle of the vacum lines


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