No throttle response
Thread Starter
Member
Joined: Aug 2015
Posts: 174
Likes: 10
2003 CLK 320 cabriolet
No throttle response
I was driving hard for a 100 miles or so, it was hot out, and I had hardly any throttle response. The temp gauge was close to 100, I had 1/4 tank of gas. When I pushed the gas pedal, there was no response for maybe 3-5 seconds, then slowly it picked up. When I could stop, I filled up with gas and let the car sit for awhile. After that, it was fine. It's an '03 CLK 320 convertible, by the way. In an older car I'd have guessed vapor lock. Any ideas?
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Joined: Mar 2008
Posts: 1,232
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From: Glasgow, Scotland, UK
SL 350 R230 (3.7L with AMG Speedshift autobox)
It could be dirt in the fuel injectors but doubtfull. It sounds more like your MAF is on its way out, remove and have a look to see if its got any oil on the sensor as you said it was fine when you left the car for a while which may indicate that the oil has run off the sensor allowing it to 'sense' the air flow once more.
If the MAF does have oil, then there is an engine problem as it should be dry and clean. Usual root cause for oily MAF are blocked breather nozzels on the fuel rail which you'll need to remove and clean out with some fine wire like 0.8mm welding wire or piano wire etc along with some carb cleaner helps.
PS you can clean the MAF gently but you need to takle the oil issue quick if this is the case before damaning the MAF permanently.
If the MAF does have oil, then there is an engine problem as it should be dry and clean. Usual root cause for oily MAF are blocked breather nozzels on the fuel rail which you'll need to remove and clean out with some fine wire like 0.8mm welding wire or piano wire etc along with some carb cleaner helps.
PS you can clean the MAF gently but you need to takle the oil issue quick if this is the case before damaning the MAF permanently.
Super Member
Joined: Jan 2014
Posts: 535
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From: Pottstown, PA
'97 S500 Coupe, 2016 AMG S63 Coupe, 2007 Audi Q7
A1EK was talking about the clogged breather hose going to the manifold located by the fuel rail
https://mbworld.org/forums/clk-class...f-diy-fix.html
https://mbworld.org/forums/clk-class...f-diy-fix.html
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Thread Starter
Member
Joined: Aug 2015
Posts: 174
Likes: 10
2003 CLK 320 cabriolet
So I haven't tried the TPS, but I did have the issue again the other night, seemed to happen after stepping hard on the gas. I stopped and turned the car off and then started it up again and the car was fine. Does this still sound like TPS issue? I'm getting an A service on Monday and don't want to over pay for something I can do...
