Isaac Lewis

my car is throwing these three codes...

P0098 - intake air temperatureS2 Ckt High (to much electricity going into that circuit)

P0128 - Coolant thermostat

P0480 - Cooling Fan 1 Ctrl CKT malfunction

these are the codes but the shop wants like 90 bucks to diagnose the issue. can you guys give me some advice on how to fix these issues? my check engine light came on after flooring speed testing my car...i got up to like 140 but that did not last to long...does that have anything to do with any of this?

colodude18

iTrader: (4)

First thing to check is all your fuses under the hood.

Isaac Lewis

well when i was under the hood, i discovered that there was no coolant going to my supercharger. the system was dry....somehow. so i filled it up. but do you think the supercharger not getting coolant could cause that?

calo247

would definitely cause you IAT's to be through the roof, probably got some pretty wicked KR

Isaac Lewis

what do you mean by KR?

calo247

knock retard, engine pulls timing to prevent detonation/engine damage

Isaac Lewis

there was no knock what so ever. and no need to insult thank you.

calo247

i am not insulting you, that is what its called when you take away timing.....

and you wont hear the knock because of the KR, your engine does it before you hear it usually. i can assure you that if you did a 140mph pull with no coolant in the heat exchanger you would be getting KR. this is probably where the P0098 code is coming from as well, intake charge is WAAAAY too hot

Isaac Lewis

oh ok. i see. so KR is like a fail safe? haha. not trying to be all sensitive here either.

calo247

yes, but if you are getting KR its a sign of other problems, its still hard on the engine because if you getting KR it means you had or are having knock.

make sure that the heat exchanger pump is working as well as the engine fan and everything has the right amount of coolant in it.

Isaac Lewis

ok. so what do you think about the other two codes then? i just filled up my supercharger coolant. an air bubble in the system let all of it bleed out most likely so thats why it was empty. but as far as the thermostat code and the fan code, what do you think about those? and this is the ONLY time this has ever happened. i have put maybe 60 miles on the car since the engine light came on with 0 issues. am i good?

ECaulk

iTrader: (6)

Well the P0098 code could be a wiring issue or a bad sensor, not sure which sensor on the lsj is IAT2

P0128 is for Engine Coolant Temperature (ECT) Below Thermostat Regulating, probably need a new t-stat, what is your coolant temp at after driving around for awhile?

P0480 is likely a wiring or connector issue with the radiator fans (LSJs have 2), to test the fans turn the AC on and let it go for a few mins then pop the hood and see if both fans are on.

I also strongly recommend you get everything worked out on your car (including checking tires for age) prior to opening the car up above 110. I'm sure the ECU was pulling timing like crazy if it didn't have fluid in the heat exchanger (unless it has a crap tune on it then you'll be needing an engine soon I'm sure)

calo247

i believe the IAT2 is part of the MAP sensor on the top of the manifold

ECaulk

iTrader: (6)

Thats what I thought, but wasn't positive. Given the heat he likely built in the intake mani I'm sure it gave up

Isaac Lewis

damn. my coolant was reading at like 178 or something....pretty normal. it was like 20 degrees outside when this happened. even having this happen once is so bad, my engine could blowt? damn....and all three codes came on at once...and my tires are just fine. the tread is getting down there but i have Continental extreme contacts on my car...so no problems there. grip was just fine. and the heat exchanger cools my supercharger not the engine correct?

ECaulk

iTrader: (6)

If you have a junk tune the engine can be in danger, stock tune will be fine. If it takes to long to heat up it can cause that code

Isaac Lewis

well i think my tune is pretty good. but i have a stage 3 kit on my car....there is one issue though. i do have some very slight idle surge. my tuner says the 60lb injectors can be hard to tune and he was gonna have to fool around with them to get rid of the idle surge in them....or something like that....but my car has plenty of power. the guy that tuned my car has done all types of vehicles. from what i know that is. but i dont think its a shitty tune though. thank god i didnt go that speed the whole way to work. this was like a 2/3 to a 3/4 mile stretch i did this. then i just drove to work like normal person would....

ECaulk

iTrader: (6)

Do you have an cooling mods to go with the rest of the parts?

Definitely get the heat exchanger fluid figured out, it went somewhere.

Isaac Lewis

yeah that is weird that is just disappeared....my brother is an experienced mechanic who replaced my clutch and he said an air bubble in the system let it all bleed out. im not a mechanic and i cant work on cars so i go on his input alone....and the best cooling mod i have is probably my mishimoto radiator.

colodude18

iTrader: (4)

Unfortunately the Mishimoto radiator is not an upgrade from stock when it comes to cooling capacity. I have one myself. It's a great quality piece and will outlast a stock radiator for sure. It just doesn't cool any better than stock.

ECaulk

iTrader: (6)

If it was bone dry I would be checking all the connections and see if you're needing more fluid.

I was meaning like option b, dual pass, etc assuming you're running a 2.7 or 2.8" pulley you need something to help with the heat generated.

63 Nova SS

iTrader: (3)

I'm sorry, this just made me laugh out loud.

Isaac Lewis

ill have to double check but i think its the oversized radiator? i beleive it hold more coolant than the stock one. and no i do not have option b or a dual pass or anything....i should but neither were on the car when i bought it and i first had to buy a new clutch, down pipe, radiator...stuff like that. so now i can finally get around to dong better cooling mods.

Isaac Lewis

i would laugh too. i seriously thought he called me a retard. hahaha.

63 Nova SS

iTrader: (3)

Like I've said Lewis- keep reading about your car. When I got mine it was the first turbo car I have ever had. I've wrenched and been around cars for 35 years and I still didn't understand things being talked about sometimes (although I did know what knock was). You will get there, just keep reading the topics about things you don't understand.
Once you get some experience under your belt and start working on the car a lot, you can pass down the things you learned while doing it to the next noob that comes along. That's how it's supposed to work.