Yesterday my throttle kept sticking so quite often when I disengaged the clutch the idle was at about 2k-3k RPM, Ive had this problem before it but it disapeared for a while now its back. Ive lubricated everything I can think of inside the car first using WD30 and then grease by taking the panel under the steering collum off and getting at everything I could see plays a part in the throttle movement. Im just wondering if theres anything else that could be causing this problem. Once I stopped I kicked the throttle from full to nothing a good few times and on the drive back it didnt have a problem.
- Joined
- Nov 27, 2004
- Messages
- 4,800
- Location
- Southampton
- Car
- 65 Plate E350 CDI Convertible, 2006 CLS 55 AMG, 1997 C230K, 1999 C43/55 AMG
Hi,
What year is your W202? As the early pre-facelift vehicles had a purely mechanical linkage, and can be prone to partially siezing at the throttle body, and snapping return springs.
The face lift vehicles had a cable operated variable resitor, and this resistor was fitted by the ECU under the bonnet in front of the windscreen on the passenger side, i do very much doubt if you have this set up that your problem will be a sticking throttle cable, but possibly the variable resistor, Throttle valve (obscenely expensive new) or even an ECU issue. If you have this system and you are satisfied the cable and resistor is moving freely, I would be looking at any fault codes logged.
What year is your W202? As the early pre-facelift vehicles had a purely mechanical linkage, and can be prone to partially siezing at the throttle body, and snapping return springs.
The face lift vehicles had a cable operated variable resitor, and this resistor was fitted by the ECU under the bonnet in front of the windscreen on the passenger side, i do very much doubt if you have this set up that your problem will be a sticking throttle cable, but possibly the variable resistor, Throttle valve (obscenely expensive new) or even an ECU issue. If you have this system and you are satisfied the cable and resistor is moving freely, I would be looking at any fault codes logged.
Its a very early (registered december '93) pre-facelift car, partial siezing at the throttle body sounds like it could be the problem, is it something that more WD40 (the answer to everything) could solve?
I dont have much experience dealing with stuff under the bonnet anyone got any tips on what/where I should check?
I dont have much experience dealing with stuff under the bonnet anyone got any tips on what/where I should check?
- Joined
- Nov 27, 2004
- Messages
- 4,800
- Location
- Southampton
- Car
- 65 Plate E350 CDI Convertible, 2006 CLS 55 AMG, 1997 C230K, 1999 C43/55 AMG
Hi,
I used carb cleaner and a small brass detailing brush to clean the throttle body, then a good soaking in WD40 Whilst working the linkage, and 3 in 1 oil and a smearing of grease to finish. But do check for the condition of the return spring.
I used carb cleaner and a small brass detailing brush to clean the throttle body, then a good soaking in WD40 Whilst working the linkage, and 3 in 1 oil and a smearing of grease to finish. But do check for the condition of the return spring.
Last edited:
Had to do this on several cars and either used brake cleaner or carb cleaner and an old toothbrush.
Basically remove clean inside and outside, refit dry and clean and away you go, if electronic throttle may take a couple of days to feel normal again.
That other brush sounds to harsh to me.
Lynall
Basically remove clean inside and outside, refit dry and clean and away you go, if electronic throttle may take a couple of days to feel normal again.
That other brush sounds to harsh to me.
Lynall
- Joined
- Nov 27, 2004
- Messages
- 4,800
- Location
- Southampton
- Car
- 65 Plate E350 CDI Convertible, 2006 CLS 55 AMG, 1997 C230K, 1999 C43/55 AMG
We are talking about the external surfaces of the throttle body, and the external cable linkage, not the internal surfaces, and yes I would agree the "brass" detailling brush would be too harsh.
