Please help my g60 - Err where were we? Page 42

[Riley 0]

It be this oner mate :)

 

 

And a video of the gauge here while it pops in the inlet manifold, its a dark video...but watch the gauge and listen at 17 seconds in.

Also listen how the exhaust note changes, it changes at 27 seconds in too...but dosn't pop...sometimes it does, sometimes not.

 

http://uk.youtube.com/watch?v=4CIXoC2djrg

 

Neil. :)

[Riley 0]

And a video here connected to a cold bts...Its like a different animal man :( Revs up like a motorbike! and no popping.

 

http://uk.youtube.com/watch?v=abpd39YRJOk

[Riley 0]

Why am i sat here thinking/head scratching about this sh|t at 1.30am? :scratch:

 

Click the red x, click the red x!

 

Ive had a bit of an idea...

Im trying to save up for an exhaust system (got a 4-2-1 manifold already) as the current one is starting to blow more and more. So if i get the system sorted so i know its air tight, then double check that these red tops are useable, and then get it mapped by someone like Steve aka ex pitstop or wayne at chipwaizards? and see if they can spot anything?

 

Does that sound like a plan to finding a possible cause while sorting the bits that need doing anyway? (system/red tops need map anyway)

Will be a slightly longer term plan due to cash flow though.

 

Neil.

[flusted 0]

yes thats a good plan as they will identify the prob with wideband

[iow_corrado_g60 0]

Riley I really dont think you chucking the car in to darren at g-werks for a diagnostic check for a couple of hours is really going to cost you that much money at all, he certainly wont do anythihng with out telling you and he'll be quite happy for you to be there, I'd ring him up ask him what he thinks then get your map and your exhaust done!

[mrbeige 0]

Neil, if your manifold is blowing, wouldn't that cause you to have incorrect lambda readings? Could that be the problem, or was the problem there before the manifold started leaking?

[Riley 0]

Aye...sorry for the confusion, the actual system is blowing around the 2 boxes, and its only started after the problem appeared. My mates mk2 g60 had a snapped manifold stud and was blowing like crazy, he has never run a lambda but the car still ran perfectly fine.If i unplug my lambda the problem is still there too.

 

Riley I really dont think you chucking the car in to darren at g-werks for a diagnostic check for a couple of hours is really going to cost you that much money at all, he certainly wont do anythihng with out telling you and he'll be quite happy for you to be there, I'd ring him up ask him what he thinks then get your map and your exhaust done!

 

Im about a million miles away though mate :( Fuel cost would be immense, and Darren has suggested lots of things it may be, but we haven't found the problem yet,ive even had him on the phone in the past while ive been going through leccy checks etc. And ive checked everything that anyone else would anyway apart from the fueling via wideband. I can't really see how the fueling would change after simply parking the car up all that time ago either...weird :? Ive read a lot of Steve's posts, from pitstop and he seems extremely knowledgable.

 

Neil.

[Riley 0]

I think im going to go with the idea of, sort the exhaust just so i know its 'as it should be' and then look into the red tops/mapping.

 

Time to start saving...

 

Can anyone confirm that the red tops i have will be of use for mapping?

 

12ohms/350cc @ 3bar.

 

Neil.

[iow_corrado_g60 0]

neil does steve from pitstop live up your way now then?

[Riley 0]

Nah, not that i know of mate...but he does specifically do remapping now, and he has never contradicted himself or anything when speaking about the problem with the corrado. I just like the way he works with his live mapping etc, from what ive read anyway...

 

Neil. :)

[_leon_ 0]

that logic is crazy. the money for an exhaust is more than the cost to get a specialist to look at the car plus the fuel to get there. its just wasting money

[Riley 0]

How is it wasting money mate? :?

 

It NEEDS a system, its rotten around both boxes at either side and not really getting any better. And for the lambda to operate 110% perfectly in an ideal world it has to be leak free.

 

Wasting money would be to travel and have it mapped/looked at with a blowing exhaust, and then get the exhaust sorted...Im not in Ireland here mate :scratch: :lol:

 

Neil.

[dirtytorque 0]

If it's blowing then I guess you should get it seen to b4 doing anything else.

I can see leons point but its your car mate,if you want to soldier on then I'm sure people will chip in with advice as an when you need it.

 

It has to be somethig silly.

I can't see it being an engine fault as you have good compression and the car makes good power.

 

frustrating. :|

[steveo29 0]

cant see any point in getting anyone to map it with this fault , it doesnt sound like its the chip (s) youve tried and you dont want a new chip to mask up other faults with the car

 

be daft to have it mapped with a ropey exh too...although im sure a leaky zaust aint causing those problems

[flusted 0]

dont buy an exhaust, buy wideband

[Guest]

A rolling road session costing about £50 should highlight any fueling or other problems quite easily, it may also show if something else is intermittently breaking down and causing the problems, ecu etc

 

 

are you 100% sure you dont have a burnt/damaged/bent valve? seems weird how it is intermitent

[Riley 0]

It has to be somethig silly.

I can't see it being an engine fault as you have good compression and the car makes good power.

frustrating. :|

 

Aye...Ya not wrong mate :cry:

 

Personally i think its over fueling on part throttle or ignition not advancing for some reason. Why?

 

Well (before the red tops) without the wot switch taped up, it pops out of the TAILPIPE when gearing down, and throws the odd flame on gear change.

When the WOT switch is taped up, it dosn't do that and runs like a different car. So there has to be unburnt fuel in the exhaust when the WOT switch etc is operating normally.

 

Does this sound plausable? Over fuelling on part throttle?

 

I really don't know what to do next, but i think its sensible to replace the system and then either have a live mapping/rolling road/wideband to at least try and see if it is running rich/lean/when/where/how! WHY! :bad-words:

 

Neil. :lol:

[dirtytorque 0]

It has to be somethig silly.

I can't see it being an engine fault as you have good compression and the car makes good power.

frustrating. :|

 

Aye...Ya not wrong mate :cry:

 

Personally i think its over fueling on part throttle or ignition not advancing for some reason. Why?

 

Well (before the red tops) without the wot switch taped up, it pops out of the TAILPIPE when gearing down, and throws the odd flame on gear change.

When the WOT switch is taped up, it dosn't do that and runs like a different car. So there has to be unburnt fuel in the exhaust when the WOT switch etc is operating normally.

 

Does this sound plausable? Over fuelling on part throttle?

 

I really don't know what to do next, but i think its sensible to replace the system and then either have a live mapping/rolling road/wideband to at least try and see if it is running rich/lean/when/where/how! WHY! :bad-words:

 

Neil. :lol:

 

 

It will be easy to check if it is advancing,with a timing light.

I'm still trying to work out your psi guage.It seems like a part throttle fueling problem we just have to work out what information to the ecu is bad.

Still trying to work out what that -20 on your guage is.

It won't be -20 psi... :scratch:

[Riley 0]

.7bar/10psi i think?

 

Tbh the timing is advancing, but i don't think its quick enough to respond somehow...maybe...maybe not. :scratch:

Ill stay with the over fuelling for now i think, everything leccy wise has been replaced/tested.Isv/dizzy/ecu's/chips/sensors/senders/lambda/coil/c-o pot/injector loom etc absolutely everything except the knock sensor.

 

Neil.

[dirtytorque 0]

Blowing would confuse the lambda,just because the prob is still there when u disco the lambda dosn't mean its not lamda related.

 

 

wideband is a good idea but then thats money.

It may be worth as said getting the car to a tuners so they can see how the car is fueling at part throttle.

 

If that is - 0.7 bar then thats good.

Looking at your guage it looks like it is in fact - 0.7 bar which is about 30 kpa,which is very good.

No vac leak.

[Riley 0]

Sound...Id like to think all the pipework/cossie intercooler etc is leak free. 8)

 

Re:The lambda, ive done all the wiring checks on it, ive even taken it well out of the equasion by chopping the signal wire right up at the ecu.The lambda earth/heating/signal are all perfect as far as resistances/earthing/signal voltage.

 

Ive got so many print outs/wiring diagrams/notes that you wouldn't believe it...Ive half written a new bentley manual here :lol:

 

Neil.

[Riley 0]

Well im now running a red top chip, albeit for 300cc injectors instead of the 350cc injectors that im running.

 

It hasn't changed the chracteristics of the problem at all... :(

 

Definately revs higher though! :shock:

 

I gave it some stick on the motorway, and id normally change up just before it bleeds off boost...But it kept going :?

Normally change up at around 5800/6000 and this shows on my rr graph as where the power peeks...But it winds up to around 6500rpm now and its still going...

 

Anyway, nowt to do with the problem...

Ive rechecked the ignition timing, and its absolutely bang on 6deg btdc. Is it worth trying to go for 8deg? and see if it revs more responsively/stops the popping?

 

Pics for views,just like on vortex...never understood it meself :lol:

 

 

Neil.

[flusted 0]

did you ever get your Fuel pressure checked? Cars looking sweet as usual

[Riley 0]

Yeah, just by a local garage...who didn't really know what he was doing...He asked me where to check it!

 

It had bang on 3bar at the fuel rail, iirc it did drop off quickly when the engine was stopped...Only the fpr would cause it to drop wouldn't it? But ive had about 4 different ones on it (all 3bar)

 

Neil.

[flusted 0]

doesnt the accumulator keep the pressure up? should say in bently about pressure drop over a period of time