Hi all,

After changing the timing belt I am now on a quest to get the timing spot on. The two Y10's I have owned have always pinked a little when under load and I always put it down to a characteristic of the car - or not using 'Super' 97 RON fuel. (It's 5p a litre more!)

But after much tweaking on the current car I am unable to get rid of pinking entirely. So I bit the bullet and bought a full tank of Super - but it still pinks!

So my question to those FIRE 999CC owners out there is: do your cars pink a little?

Regards,

Martin

Fix It Again Tony!

What the hell is a pink?

Panda Power!

Mine never had unusual noises so far except for a bit of detonation when i overgapped the plugs but i got it sorted out. The valvetrain can cause a funny noise if improper oil is used.

Originally posted by panda power
What the hell is a pink?

Panda Power!

Click to expand...

red with a hint of white

no its a little ting ting ting noise fron the engine

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Cheers dave,

Spose i get a bit of a very subtle grinding noise when i first start up, but it goes away when the clutch is dipped.

It's done it since i had it so it doesn't bother me.

Panda Power!

The CL is prone to it - but, some brands of petrol suit it better than others..

The CLX doesn't..

According to Haynes the compression ratio on the CLX is a bit lower, and I suspect the engine management doesn't chuck the fuel in quite the same way as the carb

IMHO the different brands of fuel are not the same, or rather their specific additives are different.

YMMV.

correct me if i`m wrong but would having a lower compression make the engine less prone to pink/knock?

Thanks for the comments - I can't blame the fuel as it is currently running on Esso Super Unleaded.

Re: Compression
The compression is a bit low on one cylinder (no 4) and it still pinks so I would say not. If the spark is too early in the cycle it will ignite prematurely regardless of the compression. With a diesel engine (Since there is no spark plug) then lower compression may reduce premature ignition. Though I am no engineer and don't mind being corrected on this....

Fix It Again Tony!

Originally posted by kevin_ross100
correct me if i`m wrong but would having a lower compression make the engine less prone to pink/knock?

Click to expand...

Yes.

That's why I mentioned that the CLX (which doesn't knock) is lower compression.

Oddly enough I measured it (cold) yesterday:
1 - 13 Bar
2 - couldn't get the adaptor in[!]
3 - 13.something Bar
4 - 13.something Bar.

Pretty healthy, in the middle of the green section on the Gunsons "Hi-gauge"

I still suspect the engine management contributes too:
it doesn't give the same "acceleration shot" when you put your foot down, that the carburettor does.

Maybe it's part of the "looking after the catalyser/emissions" baggage that it has to contend with.

Regarding fuel - the CLX likes Esso (cooking unleaded):
it goes measurably further on a tankful (averaged over hundreds of miles and numerous tankfulls.

hmmmmmmmm maybe its a ecu type problem have you checked the co2 levels to see if its running lean/rich?

My CLX is Jan 1993, and as such is catalysed, and engine managed.


The CO level are checked as part of the MOT - My testing station gives me the printout.

First test, shortly after I got it (to see if it was worth continuing with) was

0.08% at fast idle (which is a bit on the low side)
0.37% at natural idle (891 rpm), which is under the 0.5% limit for this age of vehicle.

The most recent set
0.04% at fast idle
0.08% at natural idle (940 rpm), which is a bit too low.

I asked him if his gas tester had got a cold but he thought not.

It turned out the vacuum advance unit had popped (again) which gave a huge inlet leak..


I can't pretend it is going correctly/at its best, but the original question was about pinking... and it doesn't.

Here for "fast idle" is intended a rotation of 3000rpm...my Clx emitted less than 0.10% of CO at 910rpm, but I don't remember the exact values...btw they were pretty lower than the limits.About the "pinking": I suspect carbon deposits inside the chambers, so you could use an appropriate additive to see if the problem disappears!

Never experienced any ignition problem even at heavy load/throttle


Do I turn fast enough!?

It's a 1987 car so no ECU type nonsense to worry about!

I have bought some additive stuff and will see what happens....

Fix It Again Tony!

Reading through this, I'm just glad I've got a carb!

If it helps, mine pinks a bit on unleaded, but I've found that she prefers Jet LRP. The Texaco LRP made her pink terribly, although the Esso LRP was alright until the local garage stopped stocking it [!] She's also happy enough with Murco's LRP (John, it's in Droitwich) but seeing a Murco garage now is a rare sight.

In terms of additives, I use a combination of Redex petrol treatment, Redex lead additive, and a very good Castrol product (£9.99 from Halfrauds) that treats the petrol as well as adding an octane booster.

Martiny 10 - you may wish to try this and see what you think...

Regarding fuel, and additives..

LRP would kill the catalyser, which would write the CLX off - even a "pattern" fitting for the early '93 version is £228.60 UKP at
www.sapmotorparts.com

Regarding additives - I used big doses of injector cleaner in the early days, which transformed the way it goes.
But in terms of other things, IMHO it is cheaper to buy good brand fuel rather than supermarket stuff and add things.
Around here they are within a penny or two per litre, which isn't much difference on my usual 30 litre/300 mile fill up.

It's not worth a significant drive to save a penny or two per litre either, as the fuel cost alone on a drive is 8p per mile:
anything above 4 miles for 1p/litre, or 8 miles for 2p/litre round trip is uneconomic for me.

YMMV..


Regarding carbs versus ECU.. they are different, and a carb isn't as simple as you might imagine.

Try setting up a Pierburg E3 from scratch, so that the auto choke works correctly, and the mixture, and tick over speed, is correct when warmed up.

Then watch an ECU relearn settings after a de-power reset.[8D]

What do you guys think of redex. I used it on my motorbike is it worth it in the panda?

Hi all,

I bought some no brand fuel additive out of Woolworths - octane boost and cleaner. I may move onto Redex - Though my friend uses a Castrol additive in his Beta Twin Cam engine and swears by it, so I may opt for that instead if the "no frills" solution does not work.

Getting a carb to work porperly isn't easy - but with no cat to screw there is margin for error.

Regards,

Martin

Fix It Again Tony!

I always try to buy pre-cat Panda's simply because of the 'room for error' on the carb settings. SANDRA'S 'DOG-CAR' only runs well when it's pinking like a gud'un ! I've no idea why............

HHmmmmmmm