SteveX
Senior Member
- Joined
- Oct 27, 2009
- Messages
- 1,512
- Reaction score
- 18
Hi Guys,
Well I am nearing the end of my initial list of things to do to the CLK I purchsed.
The one I am stumped with at the moment is the power loss when at running temp then putting on full throttle (or close to it).
Here are the symptoms:
- Drives perfect from cold start (I wouldn't know if the problem is there from cold as I do not 'floor it' from cold
- Drives fine at temperature until you need to overtake on a dual carriage way for example and push the throttle quite far down
- I tested the kick down, doesn't really work, and the problem comes on shortly after so I initially thought a problem with the kickdown and box
- Pulling over and reving the car in neutral seems like it has gone into 'limp mode' Very poor throttle response, car reluctant to rev, stamping the throttle has no effect (throttle has to be open quite far and for a few second before it even starts to pick up)
- When driving the car like this it has nearly no power and just stays around 2-3k at speed, will go higher if in 1st or second when pulling away, but will take a long time, there is no power and it is not responsive.
- Restarting the car immediatly cures the issue, throttle response is back, acceleration is crisp
- I've identified that flooring the car again to overtake brings the fault back, sometimes as the car tries to go to say 5k, it then goes into 'limp mode' I guess until switching ignition on and off
- No fault lights on dash
- Unplugged MAF while the problem was occuring and engine running - no difference
- Ran with the MAF unplugged, car runs the same, seems to run ok, flooring and getting high up the revs at WOT puts the car in 'limp mode'
- Engine fan running for quite a long time, but this may not be related, I was up and down the dual carriage way working the car to get this fault to occur. Engine temp say at 80
So that's it really, the seconday cats are making a lowish pitch clonk, could at tickover, could it be the cats be heating up too much at speed, or blocked and causing an issue? If so though wouldn't a management light come on? And why would it be able to accelerate hard again after restarting a couple of time until the failt re-occurs?
The car runs identical without the MAF plugged in, I'm not sure if that proves anything or not, since the issue is at high RPM. Could it be the program that runs without the MAF causes an issue when the engine is loaded or get's higher up the RPM, then causing 'limp mode'.
Gear box changes gear fine from pulling away, but at speed just won't kick down, I guess because of lack of power.
No other symptoms, car runs smooth either way, just total loss of power as described above, I really need to get it fixed as there is a pretty big hill on my commute and I would not be confident if the error occured when I needed to give it some throttle that it would get up the hill. I also would not be happy with anyone else driving it in it's current state.
Thanks,
Well I am nearing the end of my initial list of things to do to the CLK I purchsed.
The one I am stumped with at the moment is the power loss when at running temp then putting on full throttle (or close to it).
Here are the symptoms:
- Drives perfect from cold start (I wouldn't know if the problem is there from cold as I do not 'floor it' from cold
- Drives fine at temperature until you need to overtake on a dual carriage way for example and push the throttle quite far down
- I tested the kick down, doesn't really work, and the problem comes on shortly after so I initially thought a problem with the kickdown and box
- Pulling over and reving the car in neutral seems like it has gone into 'limp mode' Very poor throttle response, car reluctant to rev, stamping the throttle has no effect (throttle has to be open quite far and for a few second before it even starts to pick up)
- When driving the car like this it has nearly no power and just stays around 2-3k at speed, will go higher if in 1st or second when pulling away, but will take a long time, there is no power and it is not responsive.
- Restarting the car immediatly cures the issue, throttle response is back, acceleration is crisp
- I've identified that flooring the car again to overtake brings the fault back, sometimes as the car tries to go to say 5k, it then goes into 'limp mode' I guess until switching ignition on and off
- No fault lights on dash
- Unplugged MAF while the problem was occuring and engine running - no difference
- Ran with the MAF unplugged, car runs the same, seems to run ok, flooring and getting high up the revs at WOT puts the car in 'limp mode'
- Engine fan running for quite a long time, but this may not be related, I was up and down the dual carriage way working the car to get this fault to occur. Engine temp say at 80
So that's it really, the seconday cats are making a lowish pitch clonk, could at tickover, could it be the cats be heating up too much at speed, or blocked and causing an issue? If so though wouldn't a management light come on? And why would it be able to accelerate hard again after restarting a couple of time until the failt re-occurs?
The car runs identical without the MAF plugged in, I'm not sure if that proves anything or not, since the issue is at high RPM. Could it be the program that runs without the MAF causes an issue when the engine is loaded or get's higher up the RPM, then causing 'limp mode'.
Gear box changes gear fine from pulling away, but at speed just won't kick down, I guess because of lack of power.
No other symptoms, car runs smooth either way, just total loss of power as described above, I really need to get it fixed as there is a pretty big hill on my commute and I would not be confident if the error occured when I needed to give it some throttle that it would get up the hill. I also would not be happy with anyone else driving it in it's current state.
Thanks,
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