[ThomasMartin]

I just installed DP's and Exhaust today and can really feel the power in 1st and 2nd BUT 3rd and 4th are not even drivable.

I went for a couple of dyno runs to see what was happening, the car is knocking very badly here is the info.All runs done on pump fuel 95 RON V2.0.2

Run 1 94% No DP and Exhaust + K&N 14.2 PSI 219kw 507NM
Run 2 94% DP + Exhaust + K&N 13.5 PSI 216kw 447nm
car was knocking very very badly not in 1st 2nd but 3rd 4th see dyno
Run 3 90%" " 11.5 PSI 224kw 444nm
Still knocking badly but got much more power by lowering to 90%
Run 4 80%" " 10.5 PSI 227 445nm
Still knocking not as bad!

My question is can the DP's make you knock even if your boost is low? I was seeing better and smoother power the more lowered settings.

V2.0.2 90% is supposed to be the standard for pump fuel i was not knocking at all 94% without DP's now im knocking at 80% with DP's
So V2 isnt really drivable at all with DP's + Exhaust at my altitude with pump fuel

Iv posted run 2 and 3 you can see on the torque curve the knocking, the torque starts to fly up right in the beginning than the timing is completely retarded i cant even drive the car it shudders so much.

HELP SHIV please can you send me the BETA DP map seriously my car isnt drivable with V2 and my DP's at any setting

[OpenFlash]

Did you actually hear knock? Because adding downpipes doesn't make the engine more knock prone. In fact, it makes it less knock prone. Also, there have been a lot of people who have run the standard v2.0.2 with downpipes (including myself) without any of the issues you describe. Since you just had work done to your car, I'd say there there is a good possibility that something else is wrong.

Shiv

[LODOSS]

Do you actually hear it knocking? or is it misfiring?

Might want to also check your DP installed and make sure that the flanges somehow did not get stuck in the wrong position.. might want to consider putting it back to stock .

[ThomasMartin]

Originally Posted by shiv@vishnu

Did you actually hear knock? Because adding downpipes doesn't make the engine more knock prone. In fact, it makes it less knock prone.

Shiv

no didnt hear knocking but took it for granted from the shuddering and dyno graph that it was.
Could it be something else, i hope so?

Thanks for the reply Shiv i just sent you mail.

[ThomasMartin]

Originally Posted by LODOSS

Do you actually hear it knocking? or is it misfiring?

it was just shuddering really badly lower down the RPM and than again at about 4000RPM. As you can see in the graph right at the start the torque starts to fly up than the graph goes all mad.

M&M had 1.47 with the same DP and exhaust system and same fuel no problems and his torque curve just jumps up

[ThomasMartin]

Originally Posted by LODOSS

Do you actually hear it knocking? or is it misfiring?

Might want to also check your DP installed and make sure that the flanges somehow did not get stuck in the wrong position.. might want to consider putting it back to stock .

I dont know but would it not feel just as bad in 1st and 2nd if there was a problem with the flanges?

[LODOSS]

I have not experience the fuel pump problem myself.. but it is possibe. it sounds like a it is misfiring.. Did you get them to log your A/F?

[ThomasMartin]

Originally Posted by shiv@vishnu

Yep, I don't think you ran into knock. Just boost oscillation caused by the installation of downpipes. Are they catless? Do you still have your stock cat-back?

shiv

Yip completely catless all the way back and i do have the stock pieces at home? Please dont say i have to go back to standard im loving this sound
M&M has exactly the same system installed at the moment.

Also thanks for the quick help Shiv . . .

[OpenFlash]

Originally Posted by ThomasMartin

Yip completely catless all the way back and i do have the stock pieces at home? Please dont say i have to go back to standard im loving this sound
M&M has exactly the same system installed at the moment.

Also thanks for the quick help Shiv . . .

I don't believe what you are experiencing is knock. I'm pretty sure something else is going on. I don't think any map will fix your issue. Probably a good idea would be to plug in your bypass plugs and drive around for a day and see if the car behaves strangely. If it does, there is something else going on. You're car just had work done to it so it's not unlikely that something wasn't put together back correctly.

Shiv

[ThomasMartin]

Also forgot to mention could be related, im getting a lot of limp modes when the car is idle, dont know if this is related to the problem or just an emission issue no CELS thrown yet but getting limp mode, reduced engine power

[DreM3]

Is that 95 Octant fuel you pumped Research Octant Number(RON) or Pump Octane Number(PON)?

I believe that South Africa pumps use RON, which is the same as what we use here in Singapore. 95RON is actually something like 89PON/AKI.

That could explain the loss of power / limp / knocking that you might be experiencing.

Try filling up with 98RON or 100RON.

[ThomasMartin]

Originally Posted by shiv@vishnu

I don't believe what you are experiencing is knock. I'm pretty sure something else is going on. I don't think any map will fix your issue. Probably a good idea would be to plug in your bypass plugs and drive around for a day and see if the car behaves strangely. If it does, there is something else going on. You're car just had work done to it so it's not unlikely that something wasn't put together back correctly.

Shiv

Suppose its possible ill plug in bypass plugs and take it to a lift tomorrow to check install, ill take some pictures. Can you mention a few things that could cause boost oscillation shiv?

[OpenFlash]

Originally Posted by ThomasMartin

Also forgot to mention could be related, im getting a lot of limp modes when the car is idle, dont know if this is related to the problem or just an emission issue no CELS thrown yet but getting limp mode, reduced engine power

Perhaps that should be the title of the thread If you are getting limp modes at idle, something isn't installed properly. Please have whoever did the work check everything.

Shiv

[OpenFlash]

Originally Posted by ThomasMartin

Suppose its possible ill plug in bypass plugs and take it to a lift tomorrow to check install, ill take some pictures. Can you mention a few things that could cause boost oscillation shiv?

Forget that comment of mine. Just go over the entire downpipe installation and double check everything.

[ThomasMartin]

Originally Posted by dre335

Is that 95 Octant fuel you pumped Research Octant Number(RON) or Pump Octane Number(PON)?

I believe that South Africa pumps use RON, which is the same as what we use here in Singapore. 95RON is actually something like 89PON/AKI.

That could explain the loss of power / limp / knocking that you might be experiencing.

Try filling up with 98RON or 100RON.

I wasnt having any problems with it before the DP install and shiv says the DP should make it less knocking prone so i dont know what the peoblem is at the moment but i dont think it fuel related.Just strange that the lower i made the torque settings the higher my power went up so with lower boost i was seeing higher power every time i lowered it. Whats up with that?

[OpenFlash]

Originally Posted by ThomasMartin

I wasnt having any problems with it before the DP install and shiv says the DP should make it less knocking prone so i dont know what the peoblem is at the moment but i dont think it fuel related.Just strange that the lower i made the torque settings the higher my power went up so with lower boost i was seeing higher power every time i lowered it. Whats up with that?

Please focus on the cause of your limp mode right now. If it started right after you installed downpipes, that is what you need to investigate. One approach is to wait until it finally throws the SES light and then read that code with the C-Reader.

Without an o2 sim or o2 sensor defouler plugs, a P0420 catalyst inefficiency code (and limp) will most likely be induced by running catless downpipes. However, this takes a bit of driving to trigger (10-20 miles). If your limp is being triggered immediately upon or shortly after start-up, you are dealing with another issue.

Shiv

[ThomasMartin]

Originally Posted by shiv@vishnu

Please focus on the cause of your limp mode right now. If it started right after you installed downpipes, that is what you need to investigate. One approach is to wait until it finally throws the SES light and then read that code with the C-Reader.

Without an o2 sim or o2 sensor defouler plugs, a P0420 catalyst inefficiency code (and limp) will most likely be induced by running catless downpipes. However, this takes a bit of driving to trigger (10-20 miles). If your limp is being triggered immediately upon or shortly after start-up, you are dealing with another issue.

Shiv

had driven about 10-15 miles when my first limp mode went on and it was when i got home and car was idling in the driveway should i go read the codes and see if there are any errors?

Im going with M&M tomorrow to buy those 02 sensor defouler plugs

[ThomasMartin]

Damn i had a whole group of errors its a long list!!!

Codes
0335
0237
0301
0303
0302
0040

HELP

[OpenFlash]

Originally Posted by ThomasMartin

Damn i had a whole group of errors its a long list!!!

Codes
0335
0237
0301
0303
0302
0040

HELP

You have your o2 sensors swapped. Basic installation error that occurred during the downpipe installation. That explains the last 4 codes. As well as why your car driving poorly.

See: http://www.engine-light-help.com/P00...ine-light.html

Shiv

[ThomasMartin]

Originally Posted by shiv@vishnu

You have your o2 sensors swapped. That is the cause of your problems.

See: http://www.engine-light-help.com/P00...ine-light.html

Shiv

Damn well its 10 pm at night here looks like its going to be a long night time to check all my wiring in the install.
dont know why the idiot would have messed under the hood though

[OpenFlash]

Originally Posted by ThomasMartin

Damn well its 10 pm at night here looks like its going to be a long night time to check all my wiring in the install.
dont know why the idiot would have messed under the hood though

I don't think you understand. Your o2 sensors were reinstalled in the wrong bungs. That is, the right sensor was screwed into the left downpipe. And the left one was screwed into the right downpipe.

shiv

[ThomasMartin]

Originally Posted by shiv@vishnu

You have your o2 sensors swapped. Basic installation error that occurred during the downpipe installation. That explains the last 4 codes. As well as why your car driving poorly.

See: http://www.engine-light-help.com/P00...ine-light.html

Shiv

Good catch shiv i hope its just that ill have to check it on the lift tomorrow morning.
how are they supposed to be placed?