SR hesitation issue

[StayBOOSTEDSR]

I'm having some type of hesitation while driving . I'd get on boost and it gets to a point where I get a momentary lag but then it catches up and then its fine. I feel a lost of power. My bov (greddy) adjustment screw leaked but then I replaced it. Feels better but still having this on going issue. no vacuum leak. its still holds boost. Any ideas?

[S13FASTBACKSR]

hesitation like the clutch is slipping or hesitation like misfiring? are you running rich at all? check your mafs voltage..clean it and check your tps voltage..should be .45v to .55v at idle and 4.5v at w.o.t. also check your timing and make sure your spark plugs are gapped correctly

[dcmxsa]

Clean you MAF...i think i was having the same problem as you. and i cleaned my MAF, and problem solved.

[da40]

check plugs and maf what kind of plugs are u using???is it a cold spark??

[dcmxsa]

Im running NGKR Stock Number: 6953 BKR5E-11...i do need to Gap mine tho...havent done that yet

[StayBOOSTEDSR]

check plugs and maf what kind of plugs are u using???is it a cold spark??

they are denso spark plugs. 8 cold range. you know what tho my air filter came from and i was running no filter it must be the maf being dirty. whats the best thing to use to clean it

[S13FASTBACKSR]

you should only be running heat range 8 spark plugs if you pushing some serious power...low horsepower engines require heat range 6 and mid range horsepower engines require 7's...to clean your maf buy some electronic cleaner..its in a spray can...clean the thermosister in the maf you'll see it..just spray it and hit it with some air

[KaleoKruzer]

What does it mean that ur adjustment screw leaked? I feel like i have the same problem, most noticeable in 1st gear around 4000-4500rpm. Sometimes my bov only lets out a small amount of air and makes a flutter sound. How would i know if i have to replace it?

[jdm_master_X]

for me it was a TPS issue. checking the MAF is easier first, but should that not cure the problem, checking the TPS with a oscilliscope could definitely show you something (like a glitch).

[KaleoKruzer]

master...ur talking to a newbie whats a TPS and what would i check on the MAF? Would these things affect the sound my BOV is making? On a side note ive been told u can change the BOV configuration to let a valve let air back into the intake manifold so that at idle i don't have harsh idleing; when i let off the throtle it drops to 600 rpm? Please help me understand....thank you

[jdm_master_X]

TPS -- throttle position sensor. if the TPS gives the ecu an inaccurate reading, the ecu will provide the motor with incorrect fuel and spark timing values and thats what causes hesitation.

as far as your BOV is concerned, how does it sound exactly. some BOVs allow a recirculation back into the intake stream. its as simple as using a t fitting to route a line to the stream.

[StayBOOSTEDSR]

I know it has been pulling timing on me. Not the same type of power then before. It has to be the maf (praying) .. I was running without a air filter. Not a smart thing. Had to order the filter from HKS its been 7 days and still waiting ...Im going to get a crack on it this afternoon and i'll post the out come DAAhhh duhhh DAHHHHHHHHH.

As Far as the BOV goes. When the bov went bad I had a great lost of power. the turbo was laggie , granted its just an s15 turbo nothing big so I kinda thought something was wrong. Check for leaks, nothing. Heard a sound like gasping air from the bov, saw the adjustment screw was stripped and felt air leaking. I think its just a bad design and if it happens again Im going hks.
Modified by StayBOOSTEDSR at 6:17 AM 10/21/2006

[S13FASTBACKSR]

checking your tps is easy..you get a multimeter and plug the positive into the power and touch the negative to a ground you should have .45 - .55volts at idle then you push the lever on the tps all the way up and you should get 4.5volts...do the same for the maf...power wire should be constant 12v and the other wire should be 5v..then you have your ground....these are very easy ways to check these things and eliminate the problems...also did you try cleaning your maf with electronic cleaner?

[StayBOOSTEDSR]

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checking your tps is easy..you get a multimeter and plug the positive into the power and touch the negative to a ground you should have .45 - .55volts at idle then you push the lever on the tps all the way up and you should get 4.5volts...do the same for the maf...power wire should be constant 12v and the other wire should be 5v..then you have your ground....these are very easy ways to check these things and eliminate the problems...also did you try cleaning your maf with electronic cleaner?

I brought the electric cleaner and I wasnt sure to use it. I was thinking it was just some compressed air. but its liquid and I wasnt sure if it was safe or not.

[S13FASTBACKSR]

buy electronic cleaner that comes in a spray can..a bottle like wd-40 comes in and spray it on the thermosister

[redline19]

definately check your o2 sensor or your spark plug and the TPS like others are saying. If you got a corroded o2 sensor you might be running to rich or your spark plugs aren't gapped right. i got the same problem right now and just ordered both the o2 sensor and spark plugs bc the car was running to rich and ruined both of them.
Modified by redline19 at 5:19 PM 10/26/2006