Cl9 engine issue (really need help)

[thomwootton19]

Hi guys I've had my cl9 for a couple of years now and ever since I've had it, on and off, the engines power isn't smooth.. It's awful and lumpy and around 5500 it refuses to rev anymore like then engines power is being halved. Obviously most evident when heavy throttle used

Not much info on the net hopefully someone can help a brother out ?

Thanks in advance

[Jasemas]

Is it an auto or manual?

[thomwootton19]

a manual mate,

having my mechanic plug his competure into it friday, will post results!

[EKVTIR-T]

yeah I would have said check for ecu error codes

also make sure the basics are correct,oil level spark plugs clean air filter etc.

[littlebo]

first of all check for compression !

[thomwootton19]

compression?

i was thinking its a fuelling issue. will post results

[littlebo]

Yep, if its stable for all 4 pistons. if fuel pump is weak then you might have power dips in higher revs and lean afr CEL.

[thomwootton19]

that sounds like it! at like 5000 rpm it feels like it leans out heaps..

wonder how to upgrade fuel pump..

[littlebo]

Fuel pump is a rather weak point , check fuel rail pressure while pump on , idle , under load.

[thomwootton19]

How do I complete such a task?

[ECU-MAN]

could be a bad ignition coil

[littlebo]

If you dont have handy guys around then stealership is only option... ECU-MAN , it could be bad anything, faulty coil will do misfires or detonation , this can be rather easily be found.

[thomwootton19]

thanks man yeah my mechanic is a bit of a weapon hes plugging it in tomorrow. wonder if he can change fuel map to suit me only using bp ultimate?

[littlebo]

Bud , this engine been designed for 95. using 98 or higher on this stock engine = waste of money.

[thomwootton19]

ahh the butt dyno lies! thanks mate really appreciate your input even though you owe me nothing.

Still have faith in the world

[Jasemas]

Using anything less than 98 is asking for trouble
Especially with the K24s notorious pinging

[littlebo]

Using anything less than 98 is asking for trouble
Especially with the K24s notorious pinging

Man, you are wrong. if only you could see what shit our guys fill in da tanks sometimes here when no 95 available ... We have worst gas in EU and CL9 can run on 92 without any signs of pinging. stock cal has very conservative ignition timing. early CU2 cals had a serious flaw which caused pings with any type of fuel, with fixed fw it can also run on 92 with slightly reduced performance. cal use knock sensor to engage ignition retard map to run engine without detonation on bad gas.

So all you 98 and 100 premium lovers , i can bet my car that you will not see even a limping pony with 98 vs 95 on stock car. its waste of money and i wanna help u to save and to bust this myth.

[Jasemas]

Here are a few threads that involve some of our Euro guru's

http://www.ozhonda.com/forum/showthread.php?171919-CL9-Fuel-Premium-or-normal-unleaded

http://www.ozhonda.com/forum/showthread.php?100027-Shell-E10-Fuel-Suitable-for-CL9

[RenzokukenJ]

Mind blowing information

OP any word yet?

[thomwootton19]

Okay guys the timing is being severely retarded apparently, mechanic says probably awful batch of fuel combined with an old filter. Going to do a new fuel filter and run this tank dry and let you know. Thoughts?

[DaRKNT]

Siphon out the shit fuel when you do fuel filter.

[EKVTIR-T]

Siphon out the shit fuel when you do fuel filter.:thumbsup:

[curtis265]

Man, you are wrong. if only you could see what shit our guys fill in da tanks sometimes here when no 95 available ... We have worst gas in EU and CL9 can run on 92 without any signs of pinging. stock cal has very conservative ignition timing. early CU2 cals had a serious flaw which caused pings with any type of fuel, with fixed fw it can also run on 92 with slightly reduced performance. cal use knock sensor to engage ignition retard map to run engine without detonation on bad gas.

So all you 98 and 100 premium lovers , i can bet my car that you will not see even a limping pony with 98 vs 95 on stock car. its waste of money and i wanna help u to save and to bust this myth.

keep in mind your EU tune is different to our AU tunes. I'm willing to bet that if they recommend 95 they've tuned it based on 91 for conservative measure.

But I do agree, the only reason why you'd want to use 98 is to have a slightly 'cleaner' and processed fuel running through the injectors which in turn may save you some sort of costs on maintenance in the future.. that's if you intend on keeping your car till the end of tiem though. Your call. I'd personally never bother unless i was tuned for it.


thanks man yeah my mechanic is a bit of a weapon hes plugging it in tomorrow. wonder if he can change fuel map to suit me only using bp ultimate?

A stock ECU will not allow the fuel map to be changed.

[thomwootton19]

Yeah I might siphon all the shit out and wipe the tank out a bit...

[littlebo]

Hey Curtis, AU and EU tunes are the same. JDM and US tune is slightly diff. I dunno what tech process is used to achieve 98 ron on oil plants in your region but all the plants we have here can do only pure 92, then they mix in some additives to bump octane to 95 or 98. More additives - more dirty fuel is, more harm and clogging for injectors , spark plugs and so on . I use pure 95 imported , without additives. I think SG plants can do pure ( real ) 95 and 98 and 98 isnt more "clean" then 95 )) So its no sense to pay more. If you wanna prolonge engine life - run LPG , its really less stressful for engine , if installed and tuned correctly, of course.

TS , i cant believe that you can have a shitty fuel there, unless gas station is operated by russians or ukrainians lol ))) Unplug battery for 5 min to reset ECU trims and then try to make a few runs to see if its still go in limp mode.

[thomwootton19]

Pretty sure it was bro, put 30 bucks of caltex in it and it's nearly perfect again. Still going to do fuel filter

[Fredoops]

Hey Curtis, AU and EU tunes are the same. JDM and US tune is slightly diff. I dunno what tech process is used to achieve 98 ron on oil plants in your region but all the plants we have here can do only pure 92, then they mix in some additives to bump octane to 95 or 98. More additives - more dirty fuel is, more harm and clogging for injectors , spark plugs and so on . I use pure 95 imported , without additives. I think SG plants can do pure ( real ) 95 and 98 and 98 isnt more "clean" then 95 ))

I think we refine to 95 then add boosters to 98

or the Singapore imported fuel is 95/98 out of the refinery, but by the time it reaches Australia, it's back down to below 95/98 or something so boosters had to be added to bring it back.


TS , i cant believe that you can have a shitty fuel there, unless gas station is operated by russians or ukrainians lol ))) Unplug battery for 5 min to reset ECU trims and then try to make a few runs to see if its still go in limp mode.

Contamination at fuel stations is a regular occurrence here.

not because operator is dodgy, it's just wear and tear on the pump/tank.

[DaRKNT]

If you wanna prolonge engine life - run LPG , its really less stressful for engine , if installed and tuned correctly, of course.


One could also run E85. I'd rather E85 over 98.

[littlebo]

This car cant run safely on fuel with more than 10-15% of alcohol, fuel system must be prepared and ECU retuned. E85 has different AFR to be fully burnt. give or take , LPG is more clean, e85 is a lil more stable to run and easier to tune.

I cant imagine what kind of contaminators can get into fuel station tank... water ? - car will stall very fast. dirt ? - filter will be clogged and fuel pressure will be low.

[RenzokukenJ]

What exactly happened to your fuel? Did you put a lower Ron fuel in your tank op?

[thomwootton19]

No I had a full tank of 98 in it.. Apparently a bad batch.. Fuel filter goes in to,orrow getting a ryco unit installed and the new fuel I put in seems to be helping too

[thomwootton19]

Just got the filter replaced with the ryco unit and the mechanic cut the old one open. It was gross.

Car is now perfect, starting first time and had more power I've had since I bought it!

Super happy best $100 over ever spent on my car!

[littlebo]

So it was clogged filter and fuel flow been low to feed the engine at high revs.. I highly recommend to check fuel pressure in such cases to see the problem and if it been soved in full. Sometimes fuel pressure regulator and pump get bad too. How much km you made on that filter ? Usually they must be changed after 40-60k.

[EKVTIR-T]

Just got the filter replaced with the ryco unit and the mechanic cut the old one open. It was gross.

Car is now perfect, starting first time and had more power I've had since I bought it!

Super happy best $100 over ever spent on my car!where do you usually buy petrol?


I reckon try to use newish stations with new holding tanks

[thomwootton19]

i try to buy it at bp in newcastle city but travel a lot so its not 100 percent.

never put crap in though.

as for the fuel filter age mate i cant say, had the car for around 40000km so definitely needed changing even though my service manual didnt say as much. stoked