Problems already

[dsmdizzle]

I just bought my car 2 days ago and it already has a problem. Last night I went for a drive and forgot to turn on the slimfan (it is hooked to a switch) and it got alittle hot, about 3/4 of the way to overheating. I noticed it when I got home so I shut it down til morning. My girlfriend wakes me up this morning and told me to move it, so I went out and started it up and the check engine light turns on. The first thing I always do when the cel turns on is reset the car by disconnecting the battery. I did that and restarted it and about 30 seconds later it turns back on. I decide to go for a drive to see if it still runs the same......Needless to say it doesnt. I am in second and it feels like something is holding it back, I get to about 3200 where it starts to spool and it doesnt feel right, I hit 10 psi at about 4000 and the car isnt pulling at all. I shift and the rpms go down for the 3rd and it does the same thing. Please help me. I checked all my intercooler couplers to see of they were tight and all of them are. I checked all the electrical connections and everything is hooked up. The only thing is there is a little whit wire for the safc hookup that is not connected to anything. The last owner said it needs an o2 sensor, my quesion is would the o2 sensor cause this or is there something else?

It is a 90 gsx with some mods:
evo 3 16g
walbro 255
fmic long route
slimfan
1994 tb
3 inch turbo back
safc 2 no tune at all
there is more but not important.

 

[dsmdizzle]

Oh it has no emissions bs.

 

[EclipseTrbo420A]

First off its not a problem, if YOU forgot to hit the switch....you cant expect the car to say hey Its getting hot, eh? Second, dont just reset the ECU its got a CEL for a reason. Get the code pulled and that will most likly narrow your search drastically. As of now...get the code pulled check for smoking from the vehice and look for oil in coolant and the other way around. Also a compression test is in order. Goodluck.

 

[dsmdizzle]

I dont see why, because it didnt overheat.

 

[EclipseTrbo420A]

I dont see why, because it didnt overheat.

Over heating isnt when the gauge is pegged at the H its when your car reads anything over normal and even then the stock gauge has a wide range and when in it, is very leniant. Think of it as burn degrees, its not either your crispy or un burnt...theres 1st, 2nd, 3rd. Its like I tell people when teaching them to drive a stick. The clutch isnt on/off its a percentage of pressure. Anyway, 3/4 of the way up makes me crap my pants if I see that. I would try those obvious things first.....All you did was over heat and then had this power loss problem which means that its a direct result of that. Its not like you over heated and while freaking out about that accidentally curbed your IC and then lost the power. Know what I mean? only 1 main thing happend and now all these problem. Im putting my money on the over heating.

 

[dsmdizzle]

Well There is no sign of the head gasket being blown. No oil in the coolant, vise versa. I really think it is the o2 sensor, becuase the a/f guage doesnt cycle from rich to lean, how it is suppose to. It idles fine but the safc shows 100% air flow. Is that normal?

 

[nightspeed87]

are you saying theres no 02 sensor in there at all? If so you have to have an 02 in there it helps the ecu measure the a/f ratio and know whats going on and what to give the engine... As far as unplugging the battery Ive done that to my car many of times (never to fix a cel though ) and it takes time of driving to get the fuel maps back correct, mines wouldnt idle for shit when I unplug my battery, and sometimes it feels slower and sometimes it feels faster and sometimes nothing changes when I unplug it... Also over heating it shouldnt of hurt power as far as I see, unless you got hotter than you thought and warped the cylinders or something odd like that but I doubt it, i mean how long were you driving while it was on hot, because I wouldnt drive a minute on hot if i see it going up... Not a good idea how you have your fan set up if you could forget that easy, just hook it up the way its suppose to be, i even have my cooling fans direct ported to where they both always stay on soon as the ign is on... Do a compression test, do you have a logger, see if its knockin and pulling back timing also and figure out why its throwing a code... thats all i can come up with.

 

[dsmdizzle]

I only drove about 5 blocks with it like that. For the fans, the last owner did it and I am not used to that so that is why I forgot. I have an o2 sensor, it is just a pos and is bad.

 

[DGajre777]

Find out what code the CEL put out.

Yes, the front o2 sensor will make the CEL come on and make your car run like crap. Sometimes when the o2 sensor is bad it will give you very bad gas mileage and not throw a code until it is dead. Go to www.densoproducts.com for o2 sensors, they are less than $50 for 2Gs, not sure about 1G. A dead second o2 sensor will not make your car run bad, but it will throw a CEL.

FYI - It takes my car 15 minutes of driving around to reset the fuel maps after I disconnect the battery.

 

[dsmdizzle]

Ok, I guess we were all wrong, and I am just stupid. I was messing with the afc last night and I accidentally switched it to something other than karman (spelling). I switched it back and it is running like a champ.