FMIC installed...now overheating

metalhedskater · #1 09-01-2005, 10:58 PM

Okay so i have a 1g j pipe and the FMIC kit i got was to fit an evo 3 16g turbo and im assuming with the j pipe. So what i did is i stretched the stock LICP and it ended up making some bends which look like its restricting air flow in two places. one right after the turbo and one right before the hard pipes leading to the FMIC. Also, the Core is not hot at all as well as the pipes after the core, but before the core the pipes are a nice warm temp.

Overall, Can airflow restriction affect the engine overheating? Im thinking the MAF is reading all this air coming and increasing the RPMS but in the long run not enough airflow is coming through because of the two restrictions. Could safc2 tuning also contribute to it as well? I havent had time to tune the car for the FMIC yet.

This weekend im gonna change the thermostat and if that doesnt work maybe i need to buy a longer J pipe???? I just hope its not something serious.

Thanks guys!!!!

metalhedskater · #2 09-01-2005, 11:00 PM

ALso, i was told to rewire the fan so it comes on at lower speeds, but the thing is the car overheats even at idle.

gsxeclipse97 · #3 09-02-2005, 02:57 AM

I don't think that the bends in the pipe are going to do anything the air is going to pass through it anyway at a high speed so...

kjewer1 · #4 09-02-2005, 08:05 AM

Are the fans still working? THe FMIC should have nothing at all to do with overheating at idle. At speed a large FMIC can block airflow to the radiator, causing high temps. When I went from a 10" tall core that worked fine to a 12" tall core it would overheat even at 70 mph. I had to install the second fan finally on the drivers side, as a pusher, and all was well. Wire both fans to come on at the same time. The ECU has fan control on a 2g, so wire up the relay triggers so both come on when the ECU commands the passenger side fan to come on. There is a vfaq on this.

metalhedskater · #5 09-02-2005, 12:43 PM

Yea i will try that. Both fans do come on, but i dont think at the same time. I was also told by one of my buddys that i should really get around to putting the heat shield on as well. As soon as i get back to chicago ill do just that. Im gonna try watter wetter and a different water coolant ratio to see if that will help as well.

metalhedskater · #6 09-02-2005, 12:50 PM

Can tunning issues have to do with the overheating as well? I was thinking about disconnecting the safc2 ( right where the plug is not the wires to the ecu) just to see what happens with the overheating, but im not sure if it will mess up the car or not.

kjewer1 · #7 09-02-2005, 12:55 PM

That sounds like a stretch. Focus on what changed since it last ran normally.

metalhedskater · #8 09-02-2005, 06:07 PM

Well i figured something out. I put a little water wetter and the idle was fine. I had the hood open though, so keep that in mind. I drove the car around a little without the ac and the car ran fine. I put the ac on, and only on the first setting. The car was still fine. When i put the ac on the second setting, the car overheated very fast. So i think it is the fans as everyone says. Man i hope the fan mod is easy to do.

What do you guys think?

Jack4161 · #9 09-03-2005, 12:15 PM

I had a 91 Eclipse Turbo stock that I thought had an overheating problem as did the dealer. Seemed to run hotter at higher rpm and then I noticed electrical load influenced it. I did some further checking of temperatures when the fan went on and off etc and found it was not an overheating but a faulty alternator regulator. It was raising the system voltage about 1/2 to 1 volt higher than normal and that was enough to cause the temperature gauge to read high. I knew something was up when the gauge would sweep a little bit faster than the water temp could change.

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