Wierd coolant temp issue...
Jan 31, 2009, 12:45 PM
#19
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This same thing happened to me last night of what you described. I was out messing around with a my buddy's c5 corvette, we did a 2nd-4th gear pull. After I lifted at the top of 4th gear (7700rpm) I noticed my temp gauge went through the roof. Didn't hit the "H" but it was up there. After about 5 seconds it immediately came back down to normal.
I pulled over at a gas station right after wards to double check everything, downloaded the internal log via AEM EMS. Not one drop of coolant was pushed, radiator was nice and full. Checked over the logs and the run started at 176degrees, when I lifted in 4th gear it went upto 190 then came back down to 178 during decel.
So I dunno what the deal was there, 190 isn't anything. But the needle on the dash was reading otherwise. It's done this same thing to me one other time but it doesn't happen all the time. Only twice has it ever happened. I did notice something screwy with the AEM log that I downloaded last night, at one point right when I lifted in 4th gear the coolant temp glitched from 190degree to 35 degree then back up. It was a very small blip witch would make me believe that the sensor is taking a crap on me. Who knows.
I'm going to yank out my sensors (dash sensor and ecu coolant temp sensor) and check both of them over.
I pulled over at a gas station right after wards to double check everything, downloaded the internal log via AEM EMS. Not one drop of coolant was pushed, radiator was nice and full. Checked over the logs and the run started at 176degrees, when I lifted in 4th gear it went upto 190 then came back down to 178 during decel.
So I dunno what the deal was there, 190 isn't anything. But the needle on the dash was reading otherwise. It's done this same thing to me one other time but it doesn't happen all the time. Only twice has it ever happened. I did notice something screwy with the AEM log that I downloaded last night, at one point right when I lifted in 4th gear the coolant temp glitched from 190degree to 35 degree then back up. It was a very small blip witch would make me believe that the sensor is taking a crap on me. Who knows.
I'm going to yank out my sensors (dash sensor and ecu coolant temp sensor) and check both of them over.
Jan 31, 2009, 06:18 PM
#20
This same thing happened to me last night of what you described. I was out messing around with a my buddy's c5 corvette, we did a 2nd-4th gear pull. After I lifted at the top of 4th gear (7700rpm) I noticed my temp gauge went through the roof. Didn't hit the "H" but it was up there. After about 5 seconds it immediately came back down to normal.
I pulled over at a gas station right after wards to double check everything, downloaded the internal log via AEM EMS. Not one drop of coolant was pushed, radiator was nice and full. Checked over the logs and the run started at 176degrees, when I lifted in 4th gear it went upto 190 then came back down to 178 during decel.
So I dunno what the deal was there, 190 isn't anything. But the needle on the dash was reading otherwise. It's done this same thing to me one other time but it doesn't happen all the time. Only twice has it ever happened. I did notice something screwy with the AEM log that I downloaded last night, at one point right when I lifted in 4th gear the coolant temp glitched from 190degree to 35 degree then back up. It was a very small blip witch would make me believe that the sensor is taking a crap on me. Who knows.
I'm going to yank out my sensors (dash sensor and ecu coolant temp sensor) and check both of them over.
I pulled over at a gas station right after wards to double check everything, downloaded the internal log via AEM EMS. Not one drop of coolant was pushed, radiator was nice and full. Checked over the logs and the run started at 176degrees, when I lifted in 4th gear it went upto 190 then came back down to 178 during decel.
So I dunno what the deal was there, 190 isn't anything. But the needle on the dash was reading otherwise. It's done this same thing to me one other time but it doesn't happen all the time. Only twice has it ever happened. I did notice something screwy with the AEM log that I downloaded last night, at one point right when I lifted in 4th gear the coolant temp glitched from 190degree to 35 degree then back up. It was a very small blip witch would make me believe that the sensor is taking a crap on me. Who knows.
I'm going to yank out my sensors (dash sensor and ecu coolant temp sensor) and check both of them over.
Mine is actually going the opposite way, the gauge says it has cooled off. Only 1/4 up from the bottom. Did a 2-4 last nite, pull started at 188, and when I let off it was 195, then it proceeded to climb to about 215 and then back down.
Never pushes or uses any coolant..
Logged my friends evo9mr today and his car cruises at 188-195 just like mine, so I don't feel so bad.
Aug 5, 2009, 02:01 AM
#21
Any update? mine is doing the same thing..
This same thing happened to me last night of what you described. I was out messing around with a my buddy's c5 corvette, we did a 2nd-4th gear pull. After I lifted at the top of 4th gear (7700rpm) I noticed my temp gauge went through the roof. Didn't hit the "H" but it was up there. After about 5 seconds it immediately came back down to normal.
I pulled over at a gas station right after wards to double check everything, downloaded the internal log via AEM EMS. Not one drop of coolant was pushed, radiator was nice and full. Checked over the logs and the run started at 176degrees, when I lifted in 4th gear it went upto 190 then came back down to 178 during decel.
So I dunno what the deal was there, 190 isn't anything. But the needle on the dash was reading otherwise. It's done this same thing to me one other time but it doesn't happen all the time. Only twice has it ever happened. I did notice something screwy with the AEM log that I downloaded last night, at one point right when I lifted in 4th gear the coolant temp glitched from 190degree to 35 degree then back up. It was a very small blip witch would make me believe that the sensor is taking a crap on me. Who knows.
I'm going to yank out my sensors (dash sensor and ecu coolant temp sensor) and check both of them over.
I pulled over at a gas station right after wards to double check everything, downloaded the internal log via AEM EMS. Not one drop of coolant was pushed, radiator was nice and full. Checked over the logs and the run started at 176degrees, when I lifted in 4th gear it went upto 190 then came back down to 178 during decel.
So I dunno what the deal was there, 190 isn't anything. But the needle on the dash was reading otherwise. It's done this same thing to me one other time but it doesn't happen all the time. Only twice has it ever happened. I did notice something screwy with the AEM log that I downloaded last night, at one point right when I lifted in 4th gear the coolant temp glitched from 190degree to 35 degree then back up. It was a very small blip witch would make me believe that the sensor is taking a crap on me. Who knows.
I'm going to yank out my sensors (dash sensor and ecu coolant temp sensor) and check both of them over.
Aug 5, 2009, 10:43 AM
#22
All of us learn something new everyday.
There is a test you guys can do for issues like this or related.
You would need a Hydro Carbon tester. Found at some Autoparts or Truck Stops.
If you test the Coolant for Hydro Carbons and the test is possitive, that could indicate you got a leak that needs attention.
Possible problems if test is possitive, streched head bolt, lifting head, bad head gasket, etc.
There should be zero to little traces of H.C. in the coolant.
There is a test you guys can do for issues like this or related.
You would need a Hydro Carbon tester. Found at some Autoparts or Truck Stops.
If you test the Coolant for Hydro Carbons and the test is possitive, that could indicate you got a leak that needs attention.
Possible problems if test is possitive, streched head bolt, lifting head, bad head gasket, etc.
There should be zero to little traces of H.C. in the coolant.
Aug 5, 2009, 11:00 PM
#23
im not losing any coolant, but im thinking the thermostat maybe sticking??
I drive to work and in the first 3 mins the temp goes all the way hot, and 40 secs later goes to normal and stays that way until i do a pull. goes all the way hot, then gets to normal 40 secs later.
I drive home at night, 60 degrees out, drive normal and same thing.. It goes to Red hot, then 40 secs later it is lower than normal..
possible thermostat?
I drive to work and in the first 3 mins the temp goes all the way hot, and 40 secs later goes to normal and stays that way until i do a pull. goes all the way hot, then gets to normal 40 secs later.
I drive home at night, 60 degrees out, drive normal and same thing.. It goes to Red hot, then 40 secs later it is lower than normal..
possible thermostat?
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