Does it consume any oil? Oil consumption can couse some erratic missing or hesitation. You do have an early Ap1 in which this is fairly common.

 

if you know another s2k in the area try swaping out the distributor and see if that does anything.

when the ignitor was going bad in my prelude i would get hesitation and heat amplified it.

 

no distributor in s2000! prelude yes, and i've been through it b4.



~tina~

 

yes normal s2000 oil consumption. and i check/fill it weekly.



~tina~

 

Bingo, I would say this is related in some manner, either through directly or has cuased some other components in your car to be clogged or suffering from oil contamination. IE: enjectors, throttle body/intake manifold, build up on valves through seals, guids leaking oil. Plugs. These are all mechanical things that are related to hesitation and linked to oil consumption as a possible source.

One way to eliminate some of your oil consuption and usuage is through the path of your throttle body and manifold, which is to install a catch can on the pvc side and remove and cap off your front breather to your intake tube and filter it on your valve cover. it does several things. Eliminate oil passing through your combustion chamber via intake, which also keeps your intake clean fee from oil build up, also eliviates some recirculated engine heat through your intake which all these things added up increases performance as well. Been running this way for a good wile, it works well. You may see a drop in your oil consuption if you are filling weekly, but at the same time, if you are filling weekly, you may be consuming the majority though your Valve guids/seals and possibly through your piston rings as well.

 

thanx

i should have clarified that i do not have excessive oil consumption. staying out of vtec keeps the oil in there just fine. even longer trips don't seem to suck it up all that much. when i get on it consistently it will eat a little oil, which i am sure is fine. i don't see how that is linked to hesitation, however

plugs, intake, etc. are clean, and injectors/valves certainly should be (without pulling them), as i use the same gas, clean tb often, and threw injector cleaner in once or twice. i can see clogged injectors being a problem on a higher mileage/not properly maintained car. car has 39k and runs super strong. acceleration is perfect. am i wrong?

~tina~

 

s2k has coil back, not a dizzy. have you checked under your hood lately?

 

Mmm, welcome to the joys of owning an Ap1. Be thankfull they updated your ecu for 02. Is it consistant or once in a wile? Does it feel like more of a serging when you keep your throttle constant or is it like you go to take off from a stop and the car hesitates? Do you find that it does this when just creeping allong in first gear trafic, just above idle almost, maybe 10mph? I have experienced this when in this last scenario mentioned and contribute it to the ecu getting a little confused for some reason when driving this way, its different then heat bog entirely but it goes away once you stick your foot on the clutch and rev it.

 

it is once in awhile, consistent with a lot of driving. seems to be more prone w/the presence of hot air/hot engine. i think i just need colder air coming in as i said before. with the occurrences happening as they have been, that is my best guess. that better fix it!

thanx all

~tina~

 

Mine was doing nearly exactly the same thing, never threw a code either. I checked the TPS voltage, plugs, oil, MAP, cleaned the IAC. Not heak soak either.
It would idle fine and hard acceleration or boost runs were fine, but from 2700-3000 rpms there would be an occasional hesitation. My AFR gauge would show a little lean when it happened. I checked air and fuel delivery next - all good.
Turned out to be the IAC, the reference voltage in or out of the IAC motor must have drifted out of range over time. I adjusted the motor position relative to the valve body (cut slots in the tamper-proof screws that hold the motor so I could use a screwdriver) and it works fine now, hesitiation gone.