questions about car's "issues"...
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r34 gtr
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questions about car's "issues"...
ok, when i drive the car it seems to hesitate while in gear sometimes, at around 2k rpm. it doesnt matter how warm or cold the engine is, and it never does it in 1st or 2nd gear, and never in 5th. usually 3rd, right after i shift. it doesnt do it all the time either, and it usually hesitates for a few seconds. the second problem is why i am driving it at 2k rpm...that horrible noise the turbo makes when i change gear..slw240 told me it was something about the turbo making rore boost than the engine needs and having air ram back into the turbine and slow it down, which sounds like it could very well be right. could this be completely solved with a bov, or could thre be a problem with the actuator too? (i used to be able to hear it vent, but now i cant). it also makes a bit of a whirring noise when i step on it, is this normal? the turbo is a brand new t25 with about 80 miles on it. the reason i ask is because neither of my other vehicles make this noise (turbo volvos) and my friend's evo 8 doesnt make this noise either (turbo is dead silent), except for the bov. please help, i posted on sxoc and no one has bothered to respond...i really need input. thanks a lot, tim
ok, when you are getting on the gas and the T25 spools up, its a very loud turbo, almost a jet engine sound whistle right?? thats normal get used to it its a cool sound ... i was next to a 1.8td jetta and didnt know it and i was hearing two sets of turbo spool whistles it was freakin me out till the girl took the lead and i noticed the T and it dawned on me her turbo was also spooling up... next with no BOV the intake will make a fluttery noise as you let of throttle thats the air slamming into the turbine . the actuator has nothing to do with blowing off extra air. it opens the waste gate to allow boost pressure to remain low by having the exhaust gases bypass the exhaust turbine in the turbo...
the hesitation, im not sure about id have to be in the car.. but mine hesitates in first and has almost no power till boost.. i have to compression test the motor eventually to see if my rings are shot, ohwell ill just crank the boost up and have some lag and then spank people ... but back to the hesitation. what is your timming set at??? i set mine at 18-20 as paul(movingviolation240) recomended. now i backed it down to 15 like the FSm says and it runs like crap and my EGTs are way high... ill advance again and let you know if thats works ,, try advancing the timmin a few if its at 15 deg .. you might just be expericaning turbo lag ... a bov would help that ... also are you running the side mount that also causees a bit of lag... yuo can IM me if you want at Sidefxs1 if you need more help !!Jon
the hesitation, im not sure about id have to be in the car.. but mine hesitates in first and has almost no power till boost.. i have to compression test the motor eventually to see if my rings are shot, ohwell ill just crank the boost up and have some lag and then spank people ... but back to the hesitation. what is your timming set at??? i set mine at 18-20 as paul(movingviolation240) recomended. now i backed it down to 15 like the FSm says and it runs like crap and my EGTs are way high... ill advance again and let you know if thats works ,, try advancing the timmin a few if its at 15 deg .. you might just be expericaning turbo lag ... a bov would help that ... also are you running the side mount that also causees a bit of lag... yuo can IM me if you want at Sidefxs1 if you need more help !!Jon
yah i know that fluttery sound i liked it but alas its damaging so i got a BOV and now its just a loud abnocish PPSSSSST... also i recomend a turbo XS type H34 its a huge BOv and it can be recirculated with out having to buy a kit.... but leave it open air.. the car doesnt seem to be reall effected, just back fires between shifts due to the sudden richness but other then that no drivabilty issues really
That makes me wonder whats going on with my ca. I have a Blitz SS BOV. If I shift or let up on the gas when boost is low, like 2psi or lower, It makes the fluttery sound and a little pshhh. I shoot flames driving normally. And I get bad gas mileage. I think thats because I have a oxygen sensor equipped engine but my harness is for a car with no catalytic converter.
skoob240 wrote:That makes me wonder whats going on with my ca. I have a Blitz SS BOV. If I shift or let up on the gas when boost is low, like 2psi or lower, It makes the fluttery sound and a little pshhh. I shoot flames driving normally. And I get bad gas mileage. I think thats because I have a oxygen sensor equipped engine but my harness is for a car with no catalytic converter.
It sounds more like retarded ignition and the BOV causing it to run rich on gear changes, as for the harness I doubt it will make any difference.
slw240sx wrote:also is you ECU for a cat or not ? sounds like retarted timming....
My car is a post 92 and all S13's got CA's CAT's as standard, and I run the O2 sensor, also you must remember the UK standard map is quiite different from the JDM CA map.
But who needs the standard map when you can tweek the map to get this....vid :ylsuper
