3SGTE issues..

[wasfishing]

Hey guys ive got a aw11 which has had a 3sgte transplant, sum ppl on here mite no the car its wildsupras old red one, its having a few issues the most annoying one is for sum reason it wont hit the rev limiter, it just revs straight past were its suppose to be and drops power, the 2nd issue is the bov wont go off, ive tried a few different bov's and a few different vac lines too it but no matter what i do it wont work, any help would be great


Shane

[NME308]

Hi mate,
3SGTE in one of them should be giggles aplenty!

Firstly I will have a stab at the rev limiter... Does the engine hit a rev limiter at all if 'over' revved enough? I would also ask if you have an aftermarked tacho onboard? My thoughts are possibility of a tacho not reading correctly? Since this is an engine conversion maybe the tacho signal is not cooperating with standard guage?

BOV, well I assume at least one of the items you have tried should have been an unbroken example! The vacuum/boost line for the BOV needs to come from the engine side of the throttle body i.e. off the plenum. The BOV will have boost pressure to assist keeping it closed under hard acceleration, and once you jump off the throttle there will be vacuum to open the valve. If you have a BOV with a diaphram action like mine then it may have 2 boost/vacuum ports and the one on the top half of the actuator is the one to plug it into.

Let us know how far I missed the mark by!

Cheers,
Jason

[mattysshop]

what rpm are you turning it to? if your turning it past 8k then yes.. dropping power would be expected and shortly might see a rod in your firewall...

are you sure you have the vac line for the BOV going somewhere between the TB and the enigne.. similar to where your boost gauge would go so you can see vac/boost.. that is what the BOV is ment to see also

[wasfishing]

half the problem was sumone decided to diconect my tvis line, so now its got power back again , havnt tested the rev limiter since but before it was reving up around 8k and not hitting it, nar it doesnt hav a aftermarket tacho, its hooked up to the stock aw11 one, ended up changing vac lines for the bov and it worked once, thinking maybe the spring is to strong so will try another with a soft spring. cheers guys

[trd_st184]

half the problem was sumone decided to diconect my tvis line, so now its got power back again , havnt tested the rev limiter since but before it was reving up around 8k and not hitting it, nar it doesnt hav a aftermarket tacho, its hooked up to the stock aw11 one, ended up changing vac lines for the bov and it worked once, thinking maybe the spring is to strong so will try another with a soft spring. cheers guys

If the BOV worked once at reasonable rpm (some BOVs can be heard from as little as 4-5psi while other brands are sprung harder) you may want to dig around, it could be a crack in the vacuum line to the bov.

The rev limiter thing may be a wiring issue, you can no doubt bypass such things but the TVIS line won't effect the rev limiter due to it being an electrical component of the ecu.

8k is pretty high for a 2litre 3sgte, I would be sticking below 7g personally. Your old 4agze used to make power to about 7g from memory, just think that the 3sgte motor is a bigger motor and its been taken to 8g. You may find that your piston rods may be easier to change as may exit the cylinder lol

[wasfishing]

have replaced the vacuum line with a new silicone one and still nothing....
I figured 8k was abit high was only there for a split second and dont plan on takin it that high again, will test to see if it hits rev limiter this arvo. strange problems, guess its just teething issues from the conversion....

[mattysshop]

tried putting it in a different place? (the vac line) like t peice of off your boost gauge.. see if it works..

just checking if your actually driving the car to test the BOV, as any decently sprung one will not crack open free revving as the engine will hardly build enough boost..

you said you tried a few different ones already? and none of them are working? how much boost are you running?

no rev limiter isn't such a bad thing anyway really.. spose that why you have a tacho

[jonathan yee]

not knowing the car at all have you retained the stock ecu?

[wasfishing]

yea having been doing road tests on the different bov's and nothing,makes 12psi on high boost and 8psi on low which should be plenty, rev limiter came back last nite, very strange, ill try T-ing it into the boost gauge and see if anything happens

and yes retained the stock ecu

[mattysshop]

so what is it hitting the limiter at? and how far was it revving without the limiter??

[wasfishing]

hits limiter a 7500 i think sumwere in that general region, before it reved out past 8k