For some reason my car engine shut off when I stop and only in the morning when the weather is below 65 degree.

Here is the modification I did to the car:
motordyne 5/16 copper iso thermal plenum spacer
aem intake
earth grounding with hyper voltage system.

I live in az, on summer time is fine or in the afternoon and its only did it in the morning cold weather.

I checked the engine bay and touch it is freaking ice cold. Is that because of the motordyne spacer keep it cold and engine shut off since it is not warming up???

Please help. Thanks

the copper spacer is only for climates that are cold.

do you know what might cause the problem is? it is never happening on afternoon or even night time ?????

What? Please don't post if you don't know or research first.


Iso Thermal and Copper Iso Thermal:

Iso Thermal and Copper Iso Thermal upgrades reduce heat transfer to substantially reduce upper and lower plenum temperatures. Cooler intake air temperatures increase air density and reduces the tendency for detonation or ping.

1) The first component is an Aramid thermal isolating gasket that is installed between the lower plenum and intake manifold. By installing a Motordyne Iso thermal Aramid gasket between the intake manifold and lower plenum, the heat soak is significantly reduced.

2) The second component is the throttle body Coolant Control Valve (CCV). The CCV allows you to selectively heat (or not heat) the plenum assembly. With local weather temperatures below 55'F the valve is left open. In warmer weather the valve can be closed for maximum thermal benefits.

3) The third thermal management component is the Iso Thermal plenum internal supports. The plenum internal supports are self retaining and self sealing. In addition to providing sealing and support, the internal supports are thermally non-conductive to effectively shut down heat transfer through the six plenum internal posts.

4) The fourth thermal management component is the Copper Throttle Body heater. Copper Iso Thermal is a premium set and forget component that can be used in place of the Coolant Control Valve (CCV). It doesn't matter how hot or cold the weather is, you don't have to adjust a valve based on the season or ambient temperatures. Install it and the throttle body remains heated while the plenum continues to remain thermally isolated. Keeping the throttle body heated prevents ice formation on the throttle body butterfly valve when driving in cold weather. If it snows or gets really cold in your area, use the Copper Iso Thermal so your engine can take full advantage of the cold air you are driving in.

sorry I wasnt trying to post false info. I was always told and read that the copper spacer was for areas that get really cold and snows.

It's always good to find out for yourself. The internet is full of false info.

To the OP - go have your battery tested.

Thanks for all the reply. Just to make it clear my car is 03, and check engine light never come on so I'm pretty sure nothing wrong with the car but this thing is freak me out specially when I have my little girl in the car and when the car shut off it's hard to control the stearing wheel so I'm worried to get accident here. Any input that might cause it will really apreciate it. Hate to call dealership and pay them and they don't find anything. Thanks

Battery fine according to autozone. Car start right a way after went off but of course have to be on parking to start it

As I mention earlier only happening in the morning and it's fine during the day and night.

Next guess is you need to re-check all the torque values on the plenum. One may be loose and causing a leak until the plenum gets hot and expands.

Also check all the vacuum lines.

i just recheck the plenum and none of em loose. I followed the instruction from DIY video here.

I had it install back in august so it's been 2 months. How can I know if there is a leak?? Would it be oil coming out of the plenum and stain the engine bay??? When i checked i didn't see any oil. everything clean.

Vacuum lines? where would that be