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Topic Re: Slight hesitation on acceleration... |
Slight hesitation on acceleration... Tony in Whittier - 8 years ago |
Re: Slight hesitation on acceleration... MarcW - 8 years ago |
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Tony in Whittier
2000 Boxster S.
When I do a mild or heavy acceleration in 2nd or 3rd, I get a light pause before the motor winds out. Have not had that previously. I do not have a check engine light. Idle fine, performance fine except for that.
Any thoughts on what I should check on? 3- 1/2 years, ~9K on the air filter.
I am thinking that the throttle body needs a cleaning.
Re: Marc has some good ideas below, but i'd like to start with fundamentals Tony in Whittier - 8 years ago |
If its between 2k and 4k you are hitting the flat post where variocam shifts. Normal. grant - 8 years ago |
I agree with Grant Guenter in Ontario - 8 years ago |
If no other explanation is found for the behavior your engine could possibly benefit... MarcW - 8 years ago |
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Tony in Whittier
I have multiple cars, so I drive it about every 2 weeks for about a week or two. During that week or two, I drive it every few days. Most of my driving is city driving and when I can I drive on the freeway, at higher speeds I do. The city driving I do always gets the engine to operating temperature. I do not push the engine until it is warmed up.
The hesitation occurs when I accelerate from about 1500 rpm to 2000 rpm on the way up to 4000 or 4500 rpm. It only happens for a split second. I would bet that it occurs at 50 % to 70% of WOT. I drive assertively, but do not drive it hard that much anymore.
The plugs have about 30K on them. Original coils.
I tried Marc's e gas reset. It appears to have worked. For the past week or so, when the engine returned to idle when stopping for a light, the idle would stay at ~1200 before settling down to 800 or 900 after ~15 to 30 seconds. That appears to be gone since the reset.
I will check it out further this week. Don't know if it makes any difference, but I just changed the serpentine belt about 500 miles ago.
Thanks guys.
Re: Question for anyone with the definitive answer: if Chevron isn't available... MarcW - 8 years ago |
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Laz
how much Techron ought to be added to how much non-Chevron gasoline to mimic Chevron's?
Just follow the direction on the bottle grant - 8 years ago |
Re: here are the asweres *NM* carlos in Montreal - 8 years ago |
Thanks. Says there are optimized formulations, Laz - 8 years ago |
Re: Thanks. Says there are optimized formulations, MarcW - 8 years ago |
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Laz
but I'm inclined to think adding a teensy bit (<.5 oz) from the bottle with each tank fill of say, 10 gallons or so, ought to be ok, too, and not too much of a bother.
I'm aware it's been said to add a bottle one fill before an oil change, to get rid of what might get into the oil. Then again, my dealer adds some sort of fuel treatment at each oil change, so whatever it is, it's perhaps getting into the new oil. Then again, so can unburned and combustion products all the time.
The extensive explanation is appreciated. *NM* Laz - 8 years ago |
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Tony in Whittier
At ~2000 to 3000 rpm. Yesterday, I treated the engine more aggressively (Left in 2nd at 4000 instead of upshifting while cruising, shifted at higher rpms, etc.).
Idle still stays at 1050 to 1100 for about 3 to 5 sec. before dropping to 600 or 700 when I lift to stop for a stop light.
Filled it up at Chevron too. Will test more.
No CEL. I checked the oil filler tube cap. Tony in Whittier - 8 years ago |
Any pending error codes? *NM* MarcW - 8 years ago |
That could be a sticking throttle body Boxsterra - 8 years ago |
Re: Slight hesitation on acceleration... Pedro (Odessa, FL) - 8 years ago |