When I accelerate hard, say in 2nd or 3rd gear I find that the acceleration is good but a little odd in that in seems to come in bursts. Once a certain number of RPM is reached it’s almost list a little turbo kicks in at a few stages. Is this normal or do I have clogged injectors or something?
You may have some issues. Check your fuel delivery (fuel pump, filters, distributor, accumulator and injectors) and spark (plugs, cables, etc.).
Might want to try a tank of gas with a can of Techron fuel injection cleaner first. Cheap and simple.
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Regards,
Axel
1990 SEC, Arctic White w/gray interior, M119.960 326 Hp. engine from 1992 500 SL, 722.370 transmission from 500E (reinforced clutches), 2:82 Differential, Euro Headlamps, 1st Gear Start module, One-Touch Window module and Keyless Entry module all from BergWerks, Bilstein HD Shocks on front axle, H&R lowering springs front and rear, AMG 3-piece 17" rims, 8.5" in the front and 10" at the rear.
When I accelerate hard, say in 2nd or 3rd gear I find that the acceleration is good but a little odd in that in seems to come in bursts. Once a certain number of RPM is reached it’s almost list a little turbo kicks in at a few stages. Is this normal or do I have clogged injectors or something?
Thanks
Norm
420SE
I have to agree with axlewulf on this. It sounds like the engine is surging and the power comes in bursts and wanes off. This is often a fuel related problem.
Thanks guys, I'll maybe try getting a fuel injector cleaner and then change the fuel filter. I dont think its too big a problem because I would still say the acceleration is fairly smooth.
Sounds like your mixture needs to be checked, both via the CO (up to 2500RPM) and via the EHA, 2500 rpm +..
Ideally I would have an extra O2 bung installed then visit a dyno w/ a wideband o2 sensor setup. This will tell you Exactly what's going on w/ your AF.
Actually, would a car without a catalytic converter even have an O2 sensor? Being a UK car I dont think mine has a cat.
Having done a quick search on the forum I found that it seems to be that when the check engine light is on, its time for a new O2 sensor. My light certainly hasnt come on.
Just because your light isn't on does not mean you don't need a new sensor. Sensors get very slow with age, making it hard to get a mixture correct. Couple a worn O2 w/ incorrect settings and the symptoms you describe are not out of the question.
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