Last night I wasat a set of lights. I was in my Supercharged 2000 c5 (exhaust, 42 lbs injectors, 90mm fast intake) 623 Ninja beside me, 350Z behind me. Need I say more. Everything went as planned, but my car shut down after I merged off. I beleive it said "Shut down or protection mode" can't really remember? I couldn't understand why. It would just turn over -nothing would fire! Lots of fuel pressure...58psi, 1/3 tank of gas on gauge, no smoke, no weird noises, etc... So i went home grabbed my laptop and scanner. Brought the codes up and "P1258 engine coolent overtemperature" sure enough I looked at the temp gauge and it is wrapped. I let the car cool down for a couple of hours thinking I could just clear the code a take it home. But no it still wouldn't start, just turn over.
A FAST intake has about 25 hours on it soI don't think the waterjacket is blocked. I had it tuned when i put the intake on. They said they bumped it from 16 degree total advance to 20 degree total. I've also had problems with my mass air flow sensor, tps, and accelerator pedal. I didn't want to drive it, let alone raceuntil all my other problems were fixed. Anyways, how do i get this thing out of protection mode??? Thanks guys/gals.

 

In my not so humble opinion, you DON'T get it out of protection mode, til you figure why it hasn't done it by itself. And of course, you DO be glad it did go in that mode.

How much would a meltdown cost?

If you do manually re-set the protect mode, you'll have to make sure it's still capable of shutdown.

 

Well, you have serious problems if the car went into protection mode. The car gave no warning at all -- no hazard or check engine lights? Was it running rough or detonating prior to the problem?

I'm not clear though on what happened. You say the car won't turn over at all? How did you get the car home?Not turning over allis a really bad sign ,given it clearly has power since you read the codes (worst case, a seized motor -- not worth thinking about ).

I don't think the FAST manifold has anything to do with it.

If it were my car I'd first determine if the engine will turn at all (will the starter budge it, will putting it in gear and pushing move the engine at all). If so, it ought to try to start (if not, I'd probably just godrink alot and cry).

As to the overheating, I'd check the temperature sending unit, the water pump and see if the thermostat is blocked. Assuming that car is undamaged and you get it running, I'd recommend an upgraded radiator (SC'd engine put out more heat) with an integral oil cooler (oil does about 1/4 of the cooling on a big engine).

Good luck.

 

Thanks. I agree I'm totally happy that it went into shut down mode. But its pretty hard to diagnose something in shut down mode. Anyways.... Lee my car wasn't running rough at ALL! And I don't beleive it was detonating either. No pinging nothing. The car gave no warning what so ever. Actually, the carDOES turn over just fine. The starter cranks the motor fine and there is no mechanical noise ( knocking, squelling, etc..) Just does not fire.
The car is parked in front of a house in a local area. Ileft it there so I could go back and inspect it today in the light. I agree I'm gonna put a better radiater in but I don't know where I should go to get one. I'm putting a 160 degree thermostat in this week too. The oil cooler is another thing?? What do you recommend for that??? My synthetic oil was changed yesterday morning so I'm sure i never did any damage to the engine. I'm gonna check the coolent system tonight. Thanks again.

 

If it turns over you are probably okay on the basic engine. The no start could be some extreme protection code, although my experience is it usually starts again if you let it sit overnight.

Good luck.

 

C4 has a shutdown (of the fuel pump), if the oil pressure drops to a critical level. I'm sure C5 has equivalent or better protection.

So you changed your oil yesterday? And you skeedaddled off the line right before the shutdown, huh?

Do you have a baffle in your oil pan? And never mind checkin' the oil now. Under high G's, guess where the oil is gonna' go? Where's the pump pickup in a C5 - ALLLLL the way back in the pan???

 

I pulled off the codes on my car. P0606 ECM/PCM processor and P1518 Throttle Actuator Control Module Serial Data Circuit (TAC). I beleive when the TAC code sets the ECM/PCM code will also go off but still not too sure why they set. I tried to reset the computerby unplugging the battery for 2 hours but it still won't start. My closest tune shop beleives I my electronics are heating up due to the supercharger. I'm ordering a heavy duty radiater and a blower hood from motorcitymold. Has anyone else had these codes go off or can give me a little insight on why??? Thanks guys.

 

What type of supercharger to you have?

 

Hi Lee. It's a centrifigal vortech. The boost is 7.5 pounds. I can't remember the size of the pulley, I beleive it is 4". The tune shop says it is an old kit probably put on in 2000. I wonder if vortech made any changes to their kits? Maybe they enlarged the intercooler?? Please let me know what you think of these codes and how they relate to my blower. Thanks.

 

Ok here is the final verdict.

The car wouldn't even let me reset P0606(ECM) and P1518(TAC) codes. I checked all the fuses for the TAC module but nothing had blown so that led me to beleive there was a problem even before the fuse box. I started fishing around my battery and tracing the line to the starter. I found that right over my diff the B+ cable had sagged enough to weld onto the exhaust. It was poorly routed. I replaced that. I still couldn't reset my codes. I ripped apart all the wiring harness and also found connectors wired in to my TPS (BOO!)It was like finding a bunch of mold in your fridge! So i soldered the wires hoping maybe my codes would now reset. They never. I ripped out the old computer and bought another programmed one for $150. Installed it and went through the relearn sequence and it fired up instantly on thye 4th cycle.

Basically the computer shorted out and gave me several false readings. So my car never did overheat it just showed the gauge was wrapped. I never really beleived it was overheated cuz there was no boiling, no exhaust ticking, no weird smells, nothing! All together it was a blessing in disguise because I had an intermintant problem with the TPS, so now its rewiredand nowgone. I also boughta motor city mold hood to pull out some of the hot air out of the engine bay (looks deadly!). I think i might go with an methonal/water injectin kit too but not too sure on everyones thought on this?