S2000 Under The Hood S2000 Technical and Mechanical discussions.

Engine Misfire

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Old 11-04-2007, 06:31 PM
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yes my car burns about that much maybe a little less, when I first bought it I thought the motor was ****ed but my dealer(BOCH HONDA NORWOOD, MASS) assured me it was normal for S2k's. I check my oil every other week.


I'll keep you guys updated tomarrow I'll be double checking the spark plugs and coils. I just might pull the valve cover also.
Old 11-04-2007, 06:37 PM
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you should check fuel injector too
Old 11-04-2007, 07:13 PM
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10% of 250 is 25
250-25=225 that would be 10%.
if he has a cylinder at 190 and 3 at 250 there is an issue. Take it to a professional and have a leakdown done. If number 1 is at that level check it with a boroscope and see whats wrong in there. You may be rebuilding a head, at best, at worst you have a scored cylinder wall and thats a big chunk of change.
Old 11-04-2007, 07:27 PM
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Originally Posted by ChefJ,Nov 4 2007, 08:13 PM
10% of 250 is 25
250-25=225 that would be 10%.
if he has a cylinder at 190 and 3 at 250 there is an issue. Take it to a professional and have a leakdown done. If number 1 is at that level check it with a boroscope and see whats wrong in there. You may be rebuilding a head, at best, at worst you have a scored cylinder wall and thats a big chunk of change.
yeah i was thinking about the lower compression on #1 but the weird thing is that the dtc's are showing all 4 cylinders misfiring. i guess it could be a p0300 code which will be a simple misfire code instead of p0301-4 which will be a specific one.

definitely do have a leak test done and see where the problem lies with that cylinder. and do the other test for spark and fuel.

good luck!
Old 11-04-2007, 07:32 PM
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Originally Posted by thatsahonda,Nov 4 2007, 04:04 PM
#1(first one outwards)190 <-due to the first time I dropped a valve which was fixed
but he said he fixed it
Old 11-04-2007, 07:32 PM
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it doenst matter what the actual compression numbers are... its the percentage difference between them that counts. You clearly have an issue in cylinder #1, which could be many different things, a leak down test would be the quickest way to find out whats wrong! if you do another compression test, remember to put a few spoon fulls of oil into cylinder #1, if the compression goes up, you have a ring or cylinder issue... if it doesnt, its probably a headgasket or valve issue.


good luck!
Old 11-06-2007, 04:30 PM
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IT'S FIXED!!

I took the MAP sensor of and banged the crap out of it. then put it back on, nomore blinky CEL!! looks like I need to buy a new sensor, as for the 190 compression I guess I have to do a leak down.
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