Very Laggy Boost

[master_illusion]

Hi PPL,

I have a really strange issue with my S1 R33. With normal or even spirited driving my turbo takes at least 3000 - 3500 rpm to even create positive boost. Once it gets onto boost it is pretty good and gets up to 9 without much issue but I know there is a problem, and can't think why. I have looked through the other topics but don't get any real specific problem places I should be looking for.

I am thinking after reading all the posts that it may be that my actuator is partially stuck, and may be leaking boost even from take off.

I do not have an FMIC yet, but I know it should bet almost on full boost by this time.

Btw just as a side note, I have a stocko turbo, Blitz DSBC, 3in system, HKS pod and Blitz BOV.

Any idea's would be greatly appreciated.

Regards

Master Illusion

Edited April 23, 2007 by master_illusion

[skylinecouple]

Hmmm,restrictive exhaust? Standard? should still be coming on at 2,700rpm.As usual we need more info,I asume the turbo is standard and same with everything else.Low k`s or has the car been boosted or cooler added? Check simple stuff first like crushed exhaust.

[skylinecouple]

Sorry,forget last post,I see you have standard turbo.Still,check exhaust.But my first thought boost wise would be the EBC.I take it you have tuned the EBC to the best it can be.IE:turn up the gain til starts to spike then turn down slightly.If gain is to low it will do exactly what you have described.

[master_illusion]

Hmmm,restrictive exhaust? Standard? should still be coming on at 2,700rpm.As usual we need more info,I asume the turbo is standard and same with everything else.Low k`s or has the car been boosted or cooler added? Check simple stuff first like crushed exhaust.

Ok here is the info. When i brought the car it had a blown motor. The motor had been over boosted, and had blown a piston resulting in a large deposit of oil being splashed around. Anyhoo a new motor was sourced and installed before I collected the car, and it has been the same since then. I have only just recently had the time to start messing around with it though.

Is it possible for oil to build up in the cooler and cause laggy boost, I have not pulled off the piping as yet but I figured that I would have popped off a cooler hose by now if that was the issue.

I am getting a new cat and middle muffler tomorrow after reading a few posts that say that the cat may have broken down. Mainly to do with the blown motor, coz none of that was changed with the new motor.

Am I on the right track with this or is there something specific I should be looking at with this.

The new motor came from the importers and had done 70k when it was sold to me.

Cheers

[master_illusion]

Sorry,forget last post,I see you have standard turbo.Still,check exhaust.But my first thought boost wise would be the EBC.I take it you have tuned the EBC to the best it can be.IE:turn up the gain til starts to spike then turn down slightly.If gain is to low it will do exactly what you have described.

Yep, already tried that, I wound the gain all the way up and all the way down to see the difference, and put it on full gain and it comes on to boost stronger now (not much mind you) (once its in the +), but still takes the 3 - 3.k to get there.

[discopotato03]

Your choise but I'd be sorting any exhaust issues before trying to force the engine or turbo with controllers .

I once had an engine detonate a piston due to an exhaust restriction I didn't know about - expensive .

Cheers A .

[RPR33]

Damaged real turbo wheel? It might be missing a few blades?

[Adriano]

^^^agreed, possibly, although they usually come right apart. I doubt it is the cat, as it would limit top end power heaps, ie it would feel like there is no boost. Have you checked the timing? Fuel filter?

[master_illusion]

^^^agreed, possibly, although they usually come right apart. I doubt it is the cat, as it would limit top end power heaps, ie it would feel like there is no boost. Have you checked the timing? Fuel filter?

Have just checked the ecu for error faults and have just noticed that its flashing 34, which is detonation sensor circut, but I have absolutely no idea where this is located.... ha ha ha. I have checked timing and have changed fuel filter. Lol Any idea's with the detonation sensor???

[/2on]

I had the exact same problem you were having a couple of months ago, except my problem ended up being there was a hose blocking the actuator arm from returning properly so the wastegate was always staying partially open