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Edd

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Edd

Evening,

I have been having running issues with my car for a while now. Please don't suggest where to get it looked as, as I know  ;)

I am currently using approx 7.5 litres of fuel per 35 miles aka approx 17mpg. This is for a mix of fast road, majority sub 60mph ie just driving around locally.

Does this sound about right or a bit excessive?

Also between 2-3k rpm in any gear the car is very hesitant on a very slight touch of the throttle, the exhaust sounds very blowy and backfiring and also have a metallic sound from the engie bay which kind of sounds like when carbs spit  ???

If i accelerate the car drives through it but on part throttle of say under 20%throttle between 2-3k it sounds like a muffled machine gun out the exhaust and very hesitant.

Is this the normal characteristics of the engine of a standard sport 2000 from the factory?

The car has been off the road for almost 3 months and just got it back on the road and I can't even remmber how it used to drive and perform  :(

would appreciate any help.

By the way the car was recently dynoed after having a lamba sensor replaced and new standard map installed an made 184bhp and a very smooth chart

any thoughts? I'm just trying to find out if I am being paranoid and trying to find problems due to the issues I've had.

thanks

Edd

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Cleggy the Spyder Man

Hi Edd

When I first got my car it was super smooth with literally  no hesitation

however I have noticed over the last six months, that it has been getting a little hesitant all the time under part throttle,  when under larger throttle openings it pulls like a train and always ticks over at idle smoothly

after my last track day the problem got a lot worse and now it is a real b***h to drive when in traffic slowly

anyway to answer your question, if your car is on throttle bodies whick I know it is, it should be super smooth, at the end of the day it is fuel injection

you need to get it looked at as do I - and I know what your gonna say to that  :(

try NMS chap

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nikpro

If this is when you back off the throttle then re-apply light throttle it's probably the closed throttle engine map.

Some tuners 'write' the map so that zero fuel goes into the cylinders at closed throttle above a certain RPM to help fuel ecconomy/emissions. (There are other reasons for tuning a race spec engine like this as well)

Others write the map so that the AFR stays around 15:1 on a closed throttle - this helps with the above condition and stops 'popping' on the overun.

It could also be an air temp compensation map being incorrect - as the air temp is now cooler than it was 3 months ago when you used the car it might not be adding enough fuel at part throttle to compensate for the denser air causing engine to run lean at these throttle openings.

Neither are serious problems and easilly corrrected but they do need looking at.

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stephenh
Definitely wrong, Edd. Get it looked at by someone who knows what they are doing with this sort of engine. NMS would get my vote as well if they are within reasonable reach of you. I was getting that sort of fuel consumption last Friday, but that was a trackday at Oulton Park!!

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Edd
If this is when you back off the throttle then re-apply light throttle it's probably the closed throttle engine map.

this seems to be the case. If I was driving the fast on a track it would be a nightmare as soon as you back off and re-apply throttle it makes this hesitation/backfiring which is quite rapid from the exhaust.

Also the hesitation between 2-3k on very light throttle is annoying when driving slowly

But does this mean the car has a problem or is this just a characteristic due to the closed loop system etc

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Edd
Definitely wrong, Edd. Get it looked at by someone who knows what they are doing with this sort of engine. NMS would get my vote as well if they are within reasonable reach of you. I was getting that sort of fuel consumption last Friday, but that was a trackday at Oulton Park!!

Stephen,

I'm not here to open a can of worms but I have been working with the factory to resolve the issues with the car and I've pointed Julian to this thread.

My car was off the road since about July and have only recently got it back so I really cannot remember how it used to drive.

Baring in mind I bought the car in June I've only managed a few hundred miles in the car due to running problems and with winter approaching I'm keen to get the car running correctly before it gets less winter use

:(

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DAVE.B

Is this running fault the reason that the car has spent so much time back at the factory?.If it is i would take it to a well known specialist and let them have a road test / power run and give you an independant report.

If they agree that its not right ,you then have to make the desicion of.

A) Return car / report to factory for them to correct.

B) Pay to have your car sorted out while you are there and then pass the invoice / report back to the factory for reimbusement.

I know that your grievence will be with the factory,but how long will they have it back for and will it then be ok.

If you have it rectified whilst your there,you will know straight away after a road test yourself if its ok.But then you will have to pay then reclaim.

I think i know which option i would choose.

Best of look / keep us posted

PS

Did you get any further with your Suzuki problems?

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hoobahole

Edd,

I'll PM you later.

What EMS are you running?

Roger

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Edd
Is this running fault the reason that the car has spent so much time back at the factory?.If it is i would take it to a well known specialist and let them have a road test / power run and give you an independant report.

If they agree that its not right ,you then have to make the desicion of.

A) Return car / report to factory for them to correct.

B) Pay to have your car sorted out while you are there and then pass the invoice / report back to the factory for reimbusement.

I know that your grievence will be with the factory,but how long will they have it back for and will it then be ok.

If you have it rectified whilst your there,you will know straight away after a road test yourself if its ok.But then you will have to pay then reclaim.

I think i know which option i would choose.

Best of look / keep us posted

PS

Did you get any further with your Suzuki problems?

I hear what your saying but I'm trying to sound out whether it sounds like a I have a problem or not as I am slightly paranoid the car hasn't run right for a while now.

I feel for all parties an external assessment may be best and if it turns out the car is fine, then great i'll foot the bill (which would be small if everythings fine) and if not, then I can deal with the consequences.

As for suzuki - they are collecting the car this week to fix problems and have asked them to make a gesture of compensation for lying to me and we'll see where that takes us  :bangshead:

As for ECU I'm not sure  :laugh:  It's a 2008 std factory built sport 2000

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Cleggy the Spyder Man
Edd - the car should run smooth

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Edd
Edd - the car should run smooth

It does run smooth, after the slight hesitation  ???  ???

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hoobahole

Edd,

Can you remember what colour the intake trumpets are on the TBs.

Factory used to use Webcon, but switched to KMS (not sure what they supply now).

Roger.

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Cleggy the Spyder Man
Edd - the car should run smooth

It does run smooth, after the slight hesitation  ???  ???

you should get virtually no hesitation at all (reading again your other comments in your first post something is not right)

I can only talk from my experiance of owning the vehicle for a year and covering 5000 miles in that time - I know for a fact that my car run super smooth with no hesitation when I first got it - and it has slowly over time either gone out of tune or developed a fault

mine as as per yours is a standard duratec, although I feel you will have a different ecu to mine

the stuttering you are getting and the problems with going slow in traffic sounds exactly like my issues which I am yet to sort

take it to NMS chap and get it sorted - no ifs no buts  :p

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Edd
Edd,

Can you remember what colour the intake trumpets are on the TBs.

Factory used to use Webcon, but switched to KMS (not sure what they supply now).

Roger.

I believe it is the KMS system

not sure on intake trumpets

Cleggy - you have pm  ;)

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stephenh
I hear what your saying but I'm trying to sound out whether it sounds like a I have a problem or not as I am slightly paranoid the car hasn't run right for a while now.

I feel for all parties an external assessment may be best and if it turns out the car is fine, then great i'll foot the bill (which would be small if everythings fine) and if not, then I can deal with the consequences.

As for ECU I'm not sure  :laugh:  It's a 2008 std factory built sport 2000

Edd the engine should pull cleanly and smoothly virtually from tick-over up to the rev limit, on any throttle opening. I'll pm you, but it will be later in the day as I have some people waiting to see me.

If your car is a 2008 spec. it will more than likely be the Dutch KMS system.

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