S2k2490

sigh*.. went to get the codes read, however there weren't any to read. The check engine light came on while I was driving over to autozone, but as usual as soon as I turn the car off the check engine light goes away and the PCM has no history of any codes coming up.What the heck? lol I had to get a new hose for the over flow tank as well. I'm starting to think that since I didnt have a hose connected to the overflow on the radiator (the old one had to be used else where during the build lol) I was losing fluid through there as well as putting air into my cooling system which might have been the culprit for the random spikes in temperature. Now as far as the random check engine light and miss.. thats still up in the air. I'm going to keep an eye on my oil and coolant to see if I see any change in color or a loss.

I definitely agree with you when you say no need to hurry and tear the motor down again. Hopefully its something minor, instead of a defective headgasket. thanks again, stay tuned!

Billman250

your back-up fuse is blown or missing this is why the CEL keeps going on and off. Data is lost each time, hence why pulling the fuse in the first place clears the data.

fix that then you can get your code.

Billman250

You cannot run an s2000 without a coolant expansion tank or you will air the system and overheat.

S2k2490

You are correct sir, learned that the hard way lol. the past 2 days havn't had any kind of overheating problem nor a check engine light coming on. However, I do still have that odd miss. Not really a miss because the engine isn't really stumbling over itself, just an obnoxious on going popping noise. occasionally it will smooth itself out. I'm assuming that the cheap castrol gtx oil i put in it could be playing a part. I kind of was running low on funds at the end of this project and had to put cheap oil in it :/. its only until next friday (payday) though lol then its going to get its usual mobile 1. Hopefully that will make a difference in it.

S2k2490

Update with the car... I finally was able to put mobile 1 in it, and also noticed that the headgasket is not leaking. The oil looked fine, and I have lost no coolant the past week. However, I still have an ugly miss with definite power loss. Before the car was driving great with plenty of power, but had the miss at idle. Now the car has a rough idle with a significant power loss. Im going to pull the injectors tomorrow and clean them out to see if one is possibly clogged.

some information that I did not add earlier: I ran the car for about 3 days with out the underside valve cover seals (the ones that seal off the sparkplug holes from oil getting in) because I ordered them saturday and unfortunately honda could not get them until tuesday. well.. after 3 days of driving, the oil filled up the spark plug holes. FML lol I had no choice but to drive the car to work those three days otherwise I wouldnt have done so. I cleaned the coil packs thoughly, as well as, the sparkplugs themselves. I let the oil that was in the spark plug holes to drain out in the cylinder (I was told it would burn out the oil, which it seemed like it did fine..) it now currently has a rough idle, as well as, power loss. I hope the oil didn't mess with the coilpacks.. I was told by Honda that it was risky, but in all probability safe until tuesday to drive.

JohnsS2000

if you did not properly bleed it out before running you could have overheated and warped/cracked the head or block. The S2000 is not the easiest car to bleed out the cooling system. If your heather is not so hot you can not keep your hand in fron of the vent it is not 100% bled out meaning you can overheat EASY

JohnsS2000

when the car is running do you have a sweet smell from the exhaust?? if so that is the smell of coolant in the exhaust

RacerXI

Have you pulled the plugs by chance and checked for contamination on the electrode?

S2k2490

ok.. so after a good valve adjustment the car has somewhat returned to normal. The valves were extremely loose come to find out. spark plugs looked normal, compression is solid. after the valve adjustment the car is much quiter and isn't missing no where near as much. However.. there is a significant power loss. There are two codes that I was able to pull today. I cant remember the number codes, but do remember what they were for. The first one was for "malfunctioning knock sensor". which is weird, because naturally we broke it during dissassembly. so I replaced it with one I bought off of ebay thinking it would be fine (trying to save cost lol). I guess I was wrong? would a knock sensor cause a significant power loss? which includes odd jerking when ever I shift. The second code was "incorrect secondary air flow" or something like that. I'm assuming its refering to the hvac system? Perhaps I have a hose connected wrong? which I find hard to beleive.. is there anything else that can cause this code?

Its so close to being perfect! just having to work the kinks out of it now.. thanks for the help guys!

LeonV

I would bet if it detects a bad knock sensor, timing would be retarded into a safe "limp" mode. There would be a significant power loss if this were to happen. I'm not that up-to-date on the S2000 though, just my best guess.