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Model year 2000 CL500 is lagging instead hard accelerating when floored, then seems to hiccup at 3500 rpm before releasing its power...Thoughts?

826 Views 12 Replies 5 Participants Last post by  ifari
Greetings all,

I hope everyone and their loved ones are doing well.

As mentioned above my 2000 CL500 is lagging (no kick-down) when accelerating with throttle floored, then seems to hiccup at 3500 rpm before releasing its power to redline.

Car seems OK otherwise and drives normally - just doesn't seem to 'give it up' like she used to when pushed.

I'm curious to see if anyone has experienced a similar symptom.

Love the car - Rides like a dream and it's always been a gem for the 12 years of ownership - But the above situation has me perplexed.

SEARCH function showed a couple of possible options, but nothing concrete so I'm inquiring with other owners or any auto mechanics here.

Throttle Actuator?
MAF sensor need cleaning or replacing?

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I thought that too and will check it out.

Research has me suspecting the MAF (something to do with mixed signals and incorrect fuel/air ratios) but it is far easier right now to look into the gas pedal.

What should I be looking for on the "2 plugs"?

Re: MAF cleaning. I purchased - from Canadian Tires - CRC SensorKleen - Every time my engine warning light comes on, I remove the Airfilter and spray the MAF, without removing it from the engine compartment. Might be worth a try.
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Greetings all,

I got down and looked at the kick-down switch to see if I could remove it - I couldn't, but I did manually click it a few times and the car has since behaved much better.

Got it on the highway and leaned on the throttle she felt much improved - No more dawdling, just rapid acceleration - Still had a bit of soft hiccup/change at 3500 that has me a little concerned, but overall the car is behaving more like its old self.

Many Thanks for all the helpful suggestions and I will post up any other changes later.

P.S. Hoping to see Mercedes and Lewis Hamilton win the 70th Anniversary GP at Silverstone...Cheers
I was quite happy to see RedBull's tire strategy work for them. Of course, not taking away from Max's contribution....
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