Vacuum???
Moderators: P3g4sus, Daniel, rat, Draco, Riekert
- Charlvdw
- 200SX Maniac
- Posts: 3882
- Joined: Wed Jan 09, 2008 10:08 am
- Car: S13
- Engine: SR
- Location: Pretoria
Vacuum???
Hi there.
Ive recently got a s13. I was a bit over eger so didnt check it out well enough before buying it. I corrected the cam timing witch was out by a tooth on each wereafter the car went better but still sluggish under 3000rpm. When it started boosting at 3000rpm it felt o k but still didnt pull all the way to redline. Then i did the ignition timing and fitted a boostgauge ,now its fine up to 3000 where it then starts to stutter, backfire and jerk, not so bad in firstgear. If i feed the throttle gradualy it wil revs thru but not as it should. Im not sure about the vacuum layout and think i might have lack of feul. I think theyve worked the turbo aswell cause according to my gauge it boosts 1bar. Any sugestions.
Charlvdw
Ive recently got a s13. I was a bit over eger so didnt check it out well enough before buying it. I corrected the cam timing witch was out by a tooth on each wereafter the car went better but still sluggish under 3000rpm. When it started boosting at 3000rpm it felt o k but still didnt pull all the way to redline. Then i did the ignition timing and fitted a boostgauge ,now its fine up to 3000 where it then starts to stutter, backfire and jerk, not so bad in firstgear. If i feed the throttle gradualy it wil revs thru but not as it should. Im not sure about the vacuum layout and think i might have lack of feul. I think theyve worked the turbo aswell cause according to my gauge it boosts 1bar. Any sugestions.
Charlvdw
- Speed breeder
- 0.7 Bar Boost
- Posts: 741
- Joined: Wed Jun 06, 2007 10:19 pm
- Car: S13
- Location: Roodepoort
Sounds like surge.
Could be vacuum leak, check with some of these guys on the forum relating to the fault codes on the ecu as well.
Check your Fuel pump and replace fuel filter (check fuel pressure after the inline fuel filter.
Last thing from me - fuel pressure regulator
Could be vacuum leak, check with some of these guys on the forum relating to the fault codes on the ecu as well.
Check your Fuel pump and replace fuel filter (check fuel pressure after the inline fuel filter.
Last thing from me - fuel pressure regulator
200sx CA18DET S13 - forged and flowed
Re: Vacuum???
that makes me think its electrical. sensors like the water temp, AFM, TPS, not working correctly, or not talking to the ECU correctly, would cause this kind of problem.Charlvdw wrote: If i feed the throttle gradualy it wil revs thru but not as it should.
are you 100% sure that the timing is now right??? you said you changed it, was the car running nicely when you test drove it before you bought it???
also, boost leaks will cause this kind of issue.
and boosting 1 bar on a stock turbo will cause it to fail quite quickly. its not going to last for a year, so fix that too!
ReeceZ wrote:I'm sorry... I couldn't help it. Please no one wish any hateful shit on me, I own an SX already
- Charlvdw
- 200SX Maniac
- Posts: 3882
- Joined: Wed Jan 09, 2008 10:08 am
- Car: S13
- Engine: SR
- Location: Pretoria
Thanks for the replies!
Cam timing i'm 100% sure of the ignition timing i set to 15degrees if the second mark on the crank pulley is the 15 degree mark? The idling did sound better after this ajustment but there is still a miss coming thru from time to time far better than wat it was. You cant ajust the wastegate on the turbo so i supose they've changed somethin inside i would like to bring the boost down. The vacuum pipe on the back of the intake also blows of some times. Doesnt anyone have a vacuum diagram, the ones i've found are all for the jap-spec with that secondary butterflies.
Nice to actually speak to people that is as or even more enthusiastic about this car than me.
Cam timing i'm 100% sure of the ignition timing i set to 15degrees if the second mark on the crank pulley is the 15 degree mark? The idling did sound better after this ajustment but there is still a miss coming thru from time to time far better than wat it was. You cant ajust the wastegate on the turbo so i supose they've changed somethin inside i would like to bring the boost down. The vacuum pipe on the back of the intake also blows of some times. Doesnt anyone have a vacuum diagram, the ones i've found are all for the jap-spec with that secondary butterflies.
Nice to actually speak to people that is as or even more enthusiastic about this car than me.
The only way for them to up the boost was to ad a T peace between the comressor housing of the turbo and waste gate(actuator) of the turbo to bleed air causing the waste gate not to open enough witch increases boost, somewhere there must be a manual or electronic tap(boost regulator).
Easy way to fix this is to put a 8mm selicone pipe straight from the comressor housing to actuator....if it still boosts that high your actuator might be faulty and not open as far as it should.
Easy way to fix this is to put a 8mm selicone pipe straight from the comressor housing to actuator....if it still boosts that high your actuator might be faulty and not open as far as it should.
From the air intake black pipe(between the turbo and air filter box)there is a thin black pipe connected from there to the solonoid, from the solonoid it goes via the back of the engine to the FPR, the same pipe is T pieced from the back of the intake manifold to FPR. That is if my memory serves me correctly....