UK & Ireland S2000 Community Discussions related to the S2000, its ownership and enthusiasm for it in the UK and Ireland. Including FAQs, and technical questions.

Stutter at slow speeds

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Old 03-21-2005, 02:24 PM
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MB
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I got it in traffic while hot the other day, with the roof off. Had some people laught at me

Is there a mass airflow sensor in the intake that calcs engine load? Not explored too much yet...

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Old 05-05-2005, 11:26 AM
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Have you tried cleaning the throttle body? That might be the problem..
Old 05-05-2005, 12:06 PM
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Originally Posted by DanTheMan107,Mar 21 2005, 05:23 AM
Thanx for advise, but ive got a CAI already that routes through to the bottom of the inner wing for better cold air and I have only ever put Optimax in it. From the sound of it, it seems a common trait then ? Surprised no-one has pinned it down yet tho.

Is it the same with post 04 cars aswell ?
Yep, I've had it a few times on my '05. Been putting in Optimax from the start.
Not a major problem once you know it might happen.
Old 05-05-2005, 12:11 PM
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Originally Posted by thatguyjosh,May 5 2005, 08:26 PM
Have you tried cleaning the throttle body? That might be the problem..
If it was the throttle body needing to be cleaned, would it still happen on a car thats only a few weeks old?
Old 05-05-2005, 12:15 PM
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Originally Posted by GTFCTIM,May 5 2005, 02:11 PM
If it was the throttle body needing to be cleaned, would it still happen on a car thats only a few weeks old?
Most likely not, it usually takes some time (more than 30K miles) for the grit to build up enough to start making the car stutter at low RPMs.
Old 05-05-2005, 01:35 PM
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More likely the throttle position sensor, which is a potentiometer (if its the same as other cars - not looked yet!) But again it would only wander with age. Lambda and MAP sensors are othe bets, as both these have an input into fuelling....

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Old 05-05-2005, 02:10 PM
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My 54 has been doing this recently - caught me out the other day turning right across traffic, nearly killed me !

I assumed it was just hot air and I needed to save up for a CAI
Old 05-05-2005, 03:18 PM
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I drive a lot in heavy traffic every day to and from work, about 65 miles including motorway and about 7-8 miles of 'crawling'. Can't say it's a problem I'd thought about until reading this thread.
Having thought about it while driving I can see what people mean, I think I just compensated by revving a little more and 'feathering' the clutch. I had an MGF that was mildly modded before the 'S' and it was a problem with that too so maybe I'm just used to the quirks of the car.
Old 05-05-2005, 09:52 PM
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Had my S2 for 9 months now & had same problem although as the 20K approached & passed the problem went too. I asked the dealer for his opinion as he also drives an S2 & yes his does the same.
When it first happened to me i was so surprised ( & embarrassed ) that i stalled the er.There was a massive ' dead spot ' at low revs & then it started to jump around like a kangeroo & i even briefly thought that id bought a duff motor as my Type-R never did anything like this at all. Thats all history now & you will get used to it. Spending money on mod's is great fun & running on Optimax may enable the car to operate more smoothly but i don't think it is a fuel delivery or intake problem so we are all going to have to live with it. Don't worry its just a quirk in the engines design. Cough's like a sailor on 60 woodbines a day at low revs but sings like a saprano at 9000. U know what i mean............. : :
Old 05-06-2005, 01:08 AM
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Another thing to check is the freeplay in the throttle cable. I took mine up and it eased the problem immediately.

p.s. Leave some free play!


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