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Need Some Help/advice

maso

By maso,
in Engines & Forced Induction

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maso

Posted
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Hey peeps got a 32(RB20) thats running like a sif, carrying on, surging and shit.... cant figure it out, it wont come on boost properly at all in 1st gear gets to about 4grand and starts surging, only does it sometimes in second, third excet.... also i'll be crusing in 5th on the free way, put the foot down to the floor... starts to spool up gets to about 140 and then just blows off by itself even know my foots on the gas, it dosent happen if i got the throttle half way down.... Now, i have a gtr top end out of a 32gtr sitting in my garage for a future project and i looked into it and found that some of the are the parts are the same for the rb26 and rb20 are..... i know for a fact that the gtr motor was running micky mouse at the time i pulled it out of the car, cause i took it for a spin (with the caved in roof, went hard... damn shame would of been a nice car)... so anyways i thought it had a miss, but after unplugging a coil at a time it got worse, (i replaced the coils anyways and checked the wiring and plugs... i replaced the AFM the black square thing that bolts on the top of the coill cover...(think its a dizzy?, correct me if i'm wrong). replaced that silver round thing on the front of the motor think its to do with the timing... replaced the plugs (ran horrible first time, forgot to gap them, after gapping them ran better but still like i sif). but injector cleaner in and octane booster but that made no difference. put a new gasket of the exhaust manifold, and had some small holes in the exhaust welded up, replaced some rubbers that looked a bit ratty, still a couple on there that have seen better days but i could feel and air getting out, I there any way i can do a pressure test with a a compressor or something, i tried reving it and seeing if i could feel any air escaping but i could tell cause of the clutch fan... i had a comp test and the motors getting tired but only 1 cylinder was just under the good soon the rest were just inside...Before this problem occurd the turbo blew up (was a HKS 28/35 or 33 i think) so got my mechanic to pull it off, he discovered that it had no water lines running through it only oil...(had the car for about 3 months at this stage and i was the first thing to go,) anyways it couldnt be recod so i had to buy a new one, found one a garret one(same turbo they use on the 911t's but its got nylon berrings the instead of metal ones), apparently the exact same just HKS dont make it anymore or something, had some braded hoses and stuff made up (my mechanic got it done at a gas joint by memory, had these new style out worked a treat. got the car running, started straight away no dramas at all, car made 197rwkws when i brought it (had major service, timing belt and dyno tune done a Electronic automotive, was making 160 before that... was bout 3 in the morning when we finished and cold as, let it warm up took it for a drive... was a weapon heaps quicker.. i have a HKS piggyback computer (FCON V) in it with a apexi dual stage boost control heaps of other goodies.. i'm thinking it might need a retune or something... but i dont see how thats the problem when it ran fine when the turbo was replaced, anyways any advice would be great cbf having sitting at a mechanics while he goes through all the shit i'v already replaced and get charged a f**k load til they find the problem.. cheers

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  • 2 months later...
defari Grand Master

defari

Posted
Posted
Hey peeps got a 32(RB20) thats running like a sif, carrying on, surging and shit.... cant figure it out, it wont come on boost properly at all in 1st gear gets to about 4grand and starts surging, only does it sometimes in second, third excet.... also i'll be crusing in 5th on the free way, put the foot down to the floor... starts to spool up gets to about 140 and then just blows off by itself even know my foots on the gas, it dosent happen if i got the throttle half way down.... Now, i have a gtr top end out of a 32gtr sitting in my garage for a future project and i looked into it and found that some of the are the parts are the same for the rb26 and rb20 are..... i know for a fact that the gtr motor was running micky mouse at the time i pulled it out of the car, cause i took it for a spin (with the caved in roof, went hard... damn shame would of been a nice car)... so anyways i thought it had a miss, but after unplugging a coil at a time it got worse, (i replaced the coils anyways and checked the wiring and plugs... i replaced the AFM the black square thing that bolts on the top of the coill cover...(think its a dizzy?, correct me if i'm wrong). replaced that silver round thing on the front of the motor think its to do with the timing... replaced the plugs (ran horrible first time, forgot to gap them, after gapping them ran better but still like i sif). but injector cleaner in and octane booster but that made no difference. put a new gasket of the exhaust manifold, and had some small holes in the exhaust welded up, replaced some rubbers that looked a bit ratty, still a couple on there that have seen better days but i could feel and air getting out, I there any way i can do a pressure test with a a compressor or something, i tried reving it and seeing if i could feel any air escaping but i could tell cause of the clutch fan... i had a comp test and the motors getting tired but only 1 cylinder was just under the good soon the rest were just inside...Before this problem occurd the turbo blew up (was a HKS 28/35 or 33 i think) so got my mechanic to pull it off, he discovered that it had no water lines running through it only oil...(had the car for about 3 months at this stage and i was the first thing to go,) anyways it couldnt be recod so i had to buy a new one, found one a garret one(same turbo they use on the 911t's but its got nylon berrings the instead of metal ones), apparently the exact same just HKS dont make it anymore or something, had some braded hoses and stuff made up (my mechanic got it done at a gas joint by memory, had these new style out worked a treat. got the car running, started straight away no dramas at all, car made 197rwkws when i brought it (had major service, timing belt and dyno tune done a Electronic automotive, was making 160 before that... was bout 3 in the morning when we finished and cold as, let it warm up took it for a drive... was a weapon heaps quicker.. i have a HKS piggyback computer (FCON V) in it with a apexi dual stage boost control heaps of other goodies.. i'm thinking it might need a retune or something... but i dont see how thats the problem when it ran fine when the turbo was replaced, anyways any advice would be great cbf having sitting at a mechanics while he goes through all the shit i'v already replaced and get charged a f**k load til they find the problem.. cheers

lol

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