S2000 Under The Hood S2000 Technical and Mechanical discussions.

cylinder 1 misfire

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Old 12-29-2023, 07:19 AM
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Originally Posted by yellow1150GS
We bought a leak down tester at Harbor Freight and when we hooked it up the leakage was so bad that the gauge just rapidly went to zero. You could hear the air coming out the exhaust pipe at the back of the car.
This was at top dead center, compression stroke?

Sorry about that.
Old 01-28-2024, 01:26 PM
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Well, I was in the final stages of getting everything back together and found an unrelated problem. I was under the car doublechecking everything and using the borescope to check all the little crannies looking for the bolt that dropped that didn't hit the floor when I spotted a green connector hanging down up front near the alternator. Broken knock sensor. We had the code for that a while back and it went away so I didn't go looking for the problem. Wife has heard the car knocking faintly when cold, but the only codes I was getting were misfires for cylinder 1 and occasionally random misfires for 2, 3 and 4. I know I didn't break it as it was covered in road grime. So now I have another issue to deal with. Boy those things are expensive!

Last edited by yellow1150GS; 09-04-2024 at 06:41 PM.
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Old 02-01-2024, 04:39 AM
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Buy Genuine Honda 30530PCX003 (30530-PCX-003) Sensor Assy., Knock for Honda S2000. Prices, fast shipping, photos, weight - Amayama

They're really not that bad even with shipping from Japan.
Old 02-01-2024, 06:10 AM
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Default Found the sensor on Amazon.

Couldn’t believe I found on OEM one on Amazon. It’s actually out for delivery and was only $140.00 plus tax. Ordered it Sunday.
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Old 02-04-2024, 11:35 AM
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Default Giz'mo is up and running

Spent about two hours in the garage with my grandson getting the car up and running. After priming the car with the injectors disconnected we hooked up injectors and got it to fire almost immediately. No check engine lights. Engine sounds strong and ready to go. Took us probably an hour to get all the air out of the coolant system. It helped a lot to have the Matco funnel coolant system to help get it bled. Of course we couldn't drive it because my grandson borrowed the low profile floor jack and forgot to bring it back so it is stuck on jack stands. One last issue is the purge valve that is attached to the airbox is acting up and will need to be replaced. Always something.
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Old 02-18-2024, 05:04 PM
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Default switched hoses

Purge valve problem turned out to be that I switched the hoses. It doesn't work right with them backwards. Took the car out today and all I can say is WOW. Car runs so smooth and there is a huge difference in low end power. Acceleration is stronger and VTEC actuated so smoothly. It never ran anywhere near that good even from the first time when we bought it almost three years ago. So pleased and looking forward to driving all those roads again.
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Old 03-31-2024, 04:33 PM
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Default 800 mile update

Just got back from another short road trip. I have put 800 miles on the car since the repairs. Engine is running extremely well and the exhaust note is now very crisp and my wife says it actually sounds "angry". The top end noise that I thought was normal is now gone, and with the hood closed when walking up to the front of the car engine is now very quiet at idle. I have been carefully ramping up the engine speeds and today did my first pull all the way to the 9000 rpm redline. When VTEC actuates it is much smoother. Loving the "new" engine. There is so much more power at lower engine rpms that the car is so much more enjoyable to drive. Pulls strong from low rpm.
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Old 08-25-2024, 01:33 PM
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Smile 2800 mile update

Thought I would give an update. Engine is running extremely well and I am loving the "new" S2000. Did our first long road trip from Cleveland Tennessee to Clarksville Tennessee staying on two lane roads the whole way (which is our usual way of travel). Got 32 mpg average for the trip and have used 15 ounces of oil since the repair. Coolant levels are fine and there have been zero problems, no leaks and NO CHECK ENGINE LIGHTS! We have spent plenty of time running the North Georgia mountain roads and enjoying how much easier the car is to drive. Glad I was able to get it done right.
Old 08-25-2024, 03:28 PM
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Did InlinePro need to surface the cylinder head when they were repairing it?
Old 09-03-2024, 02:28 AM
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Inline Pro is very much aware of the need to take less than .008” off the surface of the head so he took .002” which is all it took to get a shiny clean new surface. He did emphasize that when removing the head bolts you use a sequence of turning each bolt less then 90 degrees per turn until they are finger loose. This helps keeping the head straight and true when releasing tension on the head bolts.

Last edited by yellow1150GS; 09-04-2024 at 06:39 PM.
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