Oranoco

This is doing my head in now. The car was sorted and wouldn't pink on the drive home. I garage it whilst I move house and bring it out yesterday to have a play. It's f*ckin' pinking again! 1st and 2nd are fine but if I wind it up in 3rd it pinks once it comes on boost.

It's been suggested by a frined that the MAP sensor could be duff in the ECU. How can I check this? I don't want to fork out for a replacement if this won't cure it. Can I get my existing one repaired?

In advance

keithG666

sorry to be a complete confessed MOTOR RETARD here but....

What does Pinking sound like??? I know its DET but what causes DET??

foreigneRS

how long have you left it and what fuel is in it? i've heard that modern high octane petrols can lose their knock resistance over time.

Oranoco

The car was left for 5 weeks with about ź of atank in it.

It's still pinking though after a put 20 quids worth of Optimax in it.

Keith it sounds like somebody shaking a bag of nuts and bolts vigorously under your bonnet.

keithG666

so not a nice sound then!!

Anonymous

Its normally caused by attempting to work the petrol too hard in some manner, which could be:

excessive compression (more on N/A cars)
excessive boost
too much ignition timing
poor quality fuel

keithG666

so that'll be TOO MUCH boost for Mr ORONOCO then!!!

heeman10

Bloody hell mate, I haven't been on here for a couple of months, one of the last things I relpied to was one of your pinking threads...I come back and here you are again! This is a nightmare! Surely it's been in and out of so many places now, someone must know what the cause is? Maybe you are going to have to sacrifice a few psi to keep it at bay??

Jim Galbally

i'm guessing ignition timing problem.

unfortunately i have no idea how the E part of KE-Jet works so can't even begin to help

CliffRS4

iTrader: (1)

Would such cold weather and low charge temperatures make a difference?
Just a guess

Mind you 25 psi is quite a bit of bbost to be running or is the car just giving up from the way you treat it or should I say abuse it

Hope you get it sorted mate

Anonymous

Colder air would make it LESS likely to pink

CliffRS4

iTrader: (1)

Shows how much I know, think I'll leave it to the experts next time

heeman10

It's the thought that counts!

foreigneRS

if it's not crap fuel, and i wouldn't rule that out until you run the tank dry and fill up with what you know to be good fuel, then as jim says it must be a problem with the ignition timing not retarding (enough).

can you get a strobe timing light on it and check if the timing is changing? (you may have to fool the ecu into thinking that you have boost by pressurising the pipe going to the MAP sensor)

220TC

edited

RichardPON

where did you fill it up Steve?

The Esso on London road?

Oranoco

No Rich I always use Optimax and fill up either in Smallford or the one in St. Albans

I do run daft boost but I do have the 5th injector which has been checked and is working fine I turned the boost down to just 11psi and it still pinks at the same point (as it comes on to full boost).

Stu @ M Developments

iTrader: (12)

Not necessarily it wouldnt. its increased the air density and thus the dynamic compression has gone up, requiring less advance for the same PCP in some cases. Largely depends on how close the adv curve is to the danger point now.

However.. its more likely to be either:

1) A split ECU signal hose.
2) A faulty ECU pressure transducer.
3) Lean fuelling for whatever reason.
4) Shit fuel.

Oranoco

1) Will have a proper look next time I'm at my Mums place
2) Is that the MAP sensor in the ECU?
3) Checked and is fine and 5th injector working correctly
4) The time this has been happening for would seem unlikely.

It's cured and is fine for a day or so but then starts again

Stu @ M Developments

iTrader: (12)

Yes, some folk call it a map sensor, same thing really.

Id go for that option if its irregular pal.. OR full throttle switch intermittent, try and borrow one.

heeman10

I think it needs a good stern talking to If it's as intermittent as you say, I suppose I'd be thinking along the lines of an electrical fault, because a split hose is a split hose, and the other possibilities Stu mentioned aren't really intermittent problems are they?

Rick

It might just be on the edge timing wise - why not knock it back a couple of degrees and see?

Oranoco

By full throttle switch do you mean the Throttle POsition Sensor? Sorry for being a numbnut but I want to get it right

If it is the ECU can it be repaired or will I have to source a replacement one? Just thinking as even the last ones will be 13-14 years old now.

MadMac

oh dear mate.. aint having much luck are ya... didn't I tell ya, keep it put away for the winter cus its gonna go pop

Stu @ M Developments

iTrader: (12)

Yes, the TPS has a switch inside to signal enrichment with WOT.
Ecu cant be repaired to my knowledge and yes, the newest is nearly 15yrs old im afraid. I can test the transducer side if required.

Oranoco

Cheers Stu

JamboRS

colder air would make it MORE likely to pink
denser air more fuel,no fuel there=det

Jim Galbally

send it off to stu mate for a test trust me you can afford to be without it for a few days anyway, and at least then you know its 100%

also the ERST TPS is only a 3 position switch.... no throttle, some throttle, and full throttle... not a "proper" tps like you get on EFi that measures it exact