LS/vtec turbo

[TunedIS300]

so i picked up an integra for a steal this week. the car has a b18b1 bottom end wit a b16a2 head (ls/vtec). i noticed that vtec does not switch over what should i be looking for ? second is it turboed and feels like there is a compressor surge how do i go about fixing that im new to boosted cars. as of right now that my only 2 problems if i can get some help i would be very thankful.

[Rtaylor21]

for the first question check you vtec solenoid plug and check for damage

[MTuning]

What ecu and what's it tuned with? What BOV? Any detail on the vtec conversion? Oil delivery is important on vtec engagement.

[Foolinaround]

Cel?

also

Taken from hatertechs thread on DIY vtec troubleshooting
*VSS/ SPEEDO if your car loses its speed reference vtec will not engauge. the ecu will see it just as if you were sitting still reving the engine, no vtec

*TACHOMETER i have seen a case where there was a problem with a persons tach, and i don't know where the wiring problem was, but if the ecu doesn't have a tach reference , then how is it going to know when you reach proper rpm.. exactly

*OIL, if you don't have the correct oil presure no vtec: possible causes: dented or damaged oil pan (as members have said before) , not enough oil, or oil is so old and crappy it is thin as water

*VTEC OIL PRESURE switch, The vtec oil presure switch is what feeds back information the the computer to tell it wether or not the opening of the solinoid has alowed high presure oil into the vtec oil gallerys. Once the solinoid opens oil shoud presurize the vtec oil ways pushing the locker pins into place while the oil presure sensor right next to the vtec solinoid feeds back info to the ecu.

*TEMP, the cars coolant temp needs to be at a certian temp for vtec to engage, if any of your temperature sensors are screwed up that is another possibility to look into

*VTEC SOLINOID GASKET/screen, i have heard and seen many cases where a cloged or dirty screen that is part of the vtec soliniod gasket caused vtec to not engage or be intermitant.

*THROTTLE POSITION, if your throwing a code for the TPS being bad or wacky this can also cause intermitant or no engagement, from my expermiments, whether vtec engauges or not is throttle position dependent.



Also for your compressor surge,more info about the tune,and when exactly you think its "surging"

[TunedIS300]

i got it fixed i had no brake at full boost becasue of a vacum issue travis at PSI proformace fix the issue..im blowing off now but still surging a little as far as i can hear at light throttle and low boost hopefully its no biggie. i been playing around wit the BOV but no luck. as far as vtec check the presure switch, check the wiring and came down wit the conclusion that it has to be the tune. the previous owner had the car tuned on chrome.

[Foolinaround]

Does it sound like ftftftftft or like a shushushu

[TunedIS300]

i get the big loud fffftttt(BOV) then i get not so loud shushshu from the turbo side

[Got Insulin?]

i get the big loud fffftttt(BOV) then i get not so loud shushshu from the turbo side

Deets on the turbo and WG set-up? Could be a mechanical problem. If you're surging, generally it shouldn't make enough pressure to open your WG, but it could potentially be that your gate is stuck open. Does it hold boost all the way to redline?

[TunedIS300]

yup 10 pounds all the way to red line..the surge isnt loud like it was before when i had no BOV at all.. but now when i blow off after the blow i heard a soft surge...hope my turbo doesnt go soon haha

[TunedIS300]

the wastegate hose is runnin to a nipple on the turbo

[Got Insulin?]

Yeah, but what kind of info do you have on the WG? Internal or external?

[TunedIS300]

its a external tial wastegate..as i was lookin on other forums ppl that run the hks sqqv bov make their turbo surge too...im running a knock off version that came wit the car.

[TunedIS300]

so i did a little bit of read. is the little surge im hearing the wastegate chatter ?

[Foolinaround]

not if its a shushushu thats the ftftft.

[TunedIS300]

lets say it sounds like the turbo is fluttering after the bov

[Foolinaround]

get a sound clip for us?