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Old 04-10-2004, 06:49 PM   #1
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Default service engine soon light on.

I my service engine soon light has been on for a while now and I finally ran it to the dealer to see what the code was. The code was my coolant temp is below normal operating tempature. I changed my Them stat to a 180 has anyone else ran into this problem?

thanks,
Jason
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Old 04-10-2004, 09:06 PM   #2
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No I use a drilled 180 stat, no problems here.

Is yours drilled? what size hole?
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Old 04-10-2004, 10:13 PM   #3
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yes it is drilled not sure on the size holes I got it from zzperformance.
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Old 04-10-2004, 11:30 PM   #4
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Yes, this is a common problem. Mine did that too when I had 4 holes drilled in it like the ones ZZP sells.
The computer will set this code if the engine takes longer than a certain amount of time to warm up.
I am now running with only 1 hole but I think you could get away with 2 holes.

This problem is even more prevalent if your trips are short and in colder weather.

ZZP now sells a modified temperature sensor that will trick the computer and then you could run with more holes.

Remember that the holes will only delay the time it takes for the engine to warm up but it will still get up to the rating of the Thermostat...180 F.
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Old 04-11-2004, 12:11 AM   #5
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Quote:
Originally Posted by 2000SilverBullet
Yes, this is a common problem. Mine did that too when I had 4 holes drilled in it like the ones ZZP sells.
The computer will set this code if the engine takes longer than a certain amount of time to warm up.
I am now running with only 1 hole but I think you could get away with 2 holes.

This problem is even more prevalent if your trips are short and in colder weather.

ZZP now sells a modified temperature sensor that will trick the computer and then you could run with more holes.

Remember that the holes will only delay the time it takes for the engine to warm up but it will still get up to the rating of the Thermostat...180 F.
I just had the code programmed out of the PCM.
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Old 04-11-2004, 02:03 PM   #6
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thanks for the info.
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Old 04-11-2004, 02:56 PM   #7
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Hey Rogue, I bet you can hardly wait for the DIY Ipaq or Laptop programming system that will allow you to make changes to your PCM and flash it yourself.

.....tailor made for an IT techy like you.
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Old 04-11-2004, 03:52 PM   #8
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Quote:
Originally Posted by Rogue
Quote:
Originally Posted by 2000SilverBullet
Yes, this is a common problem. Mine did that too when I had 4 holes drilled in it like the ones ZZP sells.
The computer will set this code if the engine takes longer than a certain amount of time to warm up.
I am now running with only 1 hole but I think you could get away with 2 holes.

This problem is even more prevalent if your trips are short and in colder weather.

ZZP now sells a modified temperature sensor that will trick the computer and then you could run with more holes.

Remember that the holes will only delay the time it takes for the engine to warm up but it will still get up to the rating of the Thermostat...180 F.
I just had the code programmed out of the PCM.
And that is probably the best solution if you have that option available. I know that part of the standard DHP PCM is removing that code. I would bet the Intense PCM is the same way.

Shawn
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Old 04-13-2004, 05:33 PM   #9
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When I had that problem, my fans would come on as soon as I started the car and ran at high speed the whole time the car was running. Only if I cleared the code the fans would shut off until the code reset again. Even with DHP shutting the SES light, the PCM still picks up the problem and puts the fans on at high. The only difference is there is no SES light to let you know this is happening unless you here the fans on. The code stayed in the PCM but the light was off.
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