706 replies to this topic

[The Batman]

What's wrong with it now?

[MartinS]

The list is big and I haven't posted about them, but chill and Frank have been helping. Its never got power over 7000 but also now wont even rev to 7000 and is erratic on the way. Weve changed throttle pedals and other stuff, fixed exhausts, fitted a new alternator, manifold changes, etc etc  and done so many mapping runs for fuelling and ignition that I've lost count and it basically is gutless and useless, oh, and drinks oil.

Its been crap since I got it back and its just getting no better and sucking up money as it goes.

 

Ho hum, deep joy and all that.

 

Martin

 

[Graeme Lambert]

The list is big and I haven't posted about them, but chill and Frank have been helping. Its never got power over 7000 but also now wont even rev to 7000 and is erratic on the way. Weve changed throttle pedals and other stuff, fixed exhausts, fitted a new alternator, manifold changes, etc etc  and done so many mapping runs for fuelling and ignition that I've lost count and it basically is gutless and useless, oh, and drinks oil.

Its been crap since I got it back and its just getting no better and sucking up money as it goes.

 

Ho hum, deep joy and all that.

 

Martin

 

 

Really sorry to hear this Martin. Hopefully you can get this all sorted and start enjoying the car again.

 

You and I can drink-away our troubles on Saturday night (My list certainly rivals yours)

[CHILL Gone DUTCH]

Here is a video of martins car at zandvoort There dosent look as if there's is any excessive smoke coming out the back This was just after we changed his exhaust for franks exhaust I honestly believe that the restriction Martin has is coming from the exhaust CAT I know he has had it checked but how can you see if the CAT is wedged or blocked from looking at it I think franks exhaust also has had a failure/ blockage possibly CAT related and causing the increased boost pressure Martin is seeing As I believe martins car wil be running excess of 300 hp without the increased boost pressure

[smiley]

As I believe martins car wil be running excess of 300 hp without the increased boost pressure

 

Bloody hell. Is he running a 2.9/3.0 pully on that miltek setup?

 

Edited by smiley, 23 November 2015 - 04:15 PM.

[CHILL Gone DUTCH]

I can't remember what size pulley he bought I'm sure Martin will be along soon to tell us

[MartinS]

3.0 pulley (as some said get a 2.9 and some said get a 3.1)

 

Weird watching that video, at that time the belt was squealing and it hadn't been properly mapped ans wasn't as good as it had been with the ecotec but  it was better than it was at the national and definitely better than now.

 

 

According to the web things such as oil etc can cause a cat to fail but when we looked with a camera it was incredibly clean. Thing is, this would be the only possible blockage point in my exhaust system. If that one has gone my luck really is at an all time low!

 

 

Martin

 

 

 

Edited by MartinS, 23 November 2015 - 05:15 PM.

[smiley]

What type of exhaust manifold, and what type of backbox are you on Martin?

 

[MartinS]

Thorney 4-1 manifold and a 2tubular back box. Both easily coped with 255 bhp and that was with a restrictive cat section which was replaced by Franks which had been a car with well over 300 bhp, my car is currently running less than 250 easily.

 

Going out again soon as today reloaded a map from July on to my car as suggested and am off (again) to do a fuell learning run, a power run and get some log files. All good fun in the dark of winter.

These will no doubt confirm (as they always do) that my car is now a gutless pile of $&%*.

 

Martin S

 

Edited by MartinS, 23 November 2015 - 05:21 PM.

[CHILL Gone DUTCH]

It was running higher But martins issue is getting progressively worse

[Exmantaa]

I had so much converstaions with Martin, but the last info I can recall is still on the 3.0 pulley. (edit; 3.0 it is)

 

Martin had 3 major problems:

- a very erratic throttle bahavior...  => he changed the pedal, but his logs still show this is originating from his pedal signal.

- an enormous oil consumption... (that all leaves us guessing.)

- powerloss above 7K...

 

After his latest exhaust journey, besides the bad throttle/engine behavior, his log now show a much increased MAP pressure. (was ~180-190KPa in September, now topping at 230KPa!)  => This indicates a major restriction in the exhaust routing, or his MAP sensor going duff.

But he said the exhaust + cat looked OK...

 

To the downpipe; it's a 2.25" Miltek section with a 300cpi metal cat welded in. That exact same 2.25" downpipe ran quite some time with a Harrop on Rob's 2.0 and was only replaced for Zandy because we made him a full 2,5" section with the same 300cpi cat. I have the same on my car and only have 227KPa max with 330 Harrop Hp.

Yes, it's may cost him a few bhp up top compared to a full 2,5" with 200 cat, but it's a "quiet" downpipe and the cat survives abuse. If not clogged by oil now...  

And the only way to check a clogged cat is probably to look through it? But to eliminate any unseen problem here, just replace by a straight pipe and see if things improve. (anybody has a straight pipe section lying around for Martin?)

 

 

[smiley]

, my car is currently running less than 250 easily.

 

 

Ok, so you're back on the stock 3.35 pully now, or just loaded a basemap on the 3.0 pully?

 

Edited by smiley, 23 November 2015 - 05:29 PM.

[Exmantaa]

NO, his engine is simply running like sh*t....

[Captain Vimes]

Martin, didn't you have problems with your throttle (and TB) before changing to the b207? If the signal is still erratic (despite a new pedal and TB) could the lack of power and inability to rev be caused by wiring/connectors between the two?

[CHILL Gone DUTCH]

Martin, didn't you have problems with your throttle (and TB) before changing to the b207? If the signal is still erratic (despite a new pedal and TB) could the lack of power and inability to rev be caused by wiring/connectors between the two?

 

Wiring issue would not cause the inlet pressure to raise from around 180 kpa - 230 kpa 

but we do still know in the  back ground that there is a issue in-between the TB and TP 

 

Edited by CHILL Gone DUTCH, 23 November 2015 - 07:42 PM.

[CHILL Gone DUTCH]

Ive just sent you a email martin,

do you still have your old down pipe ?

 

if so drill out the CAT and fit it to the car and see if the boost drops 

 

( is the flexi fixed on it )

[fezzasus]

While oil can kill catalytic converters, this doesn't cause a change in pressure. Some of the elements used in oil additives bind with the active catalytic site to prevent conversion of CO to CO2.

 

Therefore the oil consumption hasn't caused exhaust failure. It's likely the other way around.

 

I have a full 3 inch system that, in all likelihood, I won't be using until 2016. Martin's welcome to borrow it if that would help trouble shoot.

[FLD]

Power loss above 7k sounds like it could be cam timing.  I wonder if the timing has wondered with all the other traumas going on?

[Exmantaa]

To keep this simple...

 

Martin's currewnt problems are:

- a measured MAP/boost pressure of 220-230KPa, while that should be around 180-190 with his system & pulley => exhaust blokkage. (fit a decat pipe to rule out cat problems, so somebody can lend him a decatted 2.5 downpipe?)

- no power at medium/high revs. (See above)

 

- a weird throttle behavior that originates from his pedal, as the pedal voltages show this strange spikey signal and he rarely gets really full throttle=> exchange/measure/test the pedal & voltages. This one need some effort & brains to sort...

 

- Oil consumption...

Edited by Exmantaa, 24 November 2015 - 09:07 AM.

[The Batman]

I have a spare throttle pedal?