power loss after warmup
09-13-2007, 04:44 PM
#1
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Join Date: Aug 2006
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Posts: 117
power loss after warmup
My car has been running pretty badly for quite some time now. It runs decent (though still not as good as it should) for the first 20 minutes or so after i start driving it, but as it starts to warm up, it gradualy looses power. Once the temp gauge gets around half way, you can already feel a noticable loss of power. Once it gets to just one mark below the red lvl, the car has lost so much torque that you can floor it just after launch, and the car just hooks up and takes off. Normaly, i have to wait to alteast 1/2 way through the rpm range to be able to floor it (in first gear) without spinning the tires. Can you all think of any problems that would make the car act this way?
I don't really know if this is related, but since it happened relatively recently i'll mention it anyways. I recently had the ecu replaced (which actualy did make it go from running unbelievably bad to decent). Right after that the car had a problem with not being able to rev very high ( i mean like it wouldnt rev above 5 grand at times) once it got hot. But after i drove the car for a few days the problem pretty much went away, so i thought that it was just the new ecu getting attuned to all the mods on the engine.
I don't really know if this is related, but since it happened relatively recently i'll mention it anyways. I recently had the ecu replaced (which actualy did make it go from running unbelievably bad to decent). Right after that the car had a problem with not being able to rev very high ( i mean like it wouldnt rev above 5 grand at times) once it got hot. But after i drove the car for a few days the problem pretty much went away, so i thought that it was just the new ecu getting attuned to all the mods on the engine.
09-13-2007, 06:00 PM
#4
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Join Date: Aug 2006
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Posts: 117
RE: power loss after warmup
the oil pressure is around the middle of the gauge. I dont have a code reader, but its hard for me to believe that after the car has been in the shop three times, and after i told them i wasnt going to come back if they didnt fix it, that the mechanic would forget to do something as obvious as check codes.
09-14-2007, 08:18 AM
#6
5th Gear Member
Join Date: Oct 2005
Location: Ohio USA
Posts: 4,616
RE: power loss after warmup
ORIGINAL: chicogotgreen
My car has been running pretty badly for quite some time now.
It runs decent (though still not as good as it should) for the first 20 minutes or so after i start driving it, but as it starts to warm up, it gradualy looses power. Once the temp gauge gets around half way, you can already feel a noticable loss of power.
Once it gets to just one mark below the red lvl, the car has lost so much torque that you can floor it just after launch, and the car just hooks up and takes off.
. But after i drove the car for a few days the problem pretty much went away, so i thought that it was just the new ecu getting attuned to all the mods on the engine.
My car has been running pretty badly for quite some time now.
It runs decent (though still not as good as it should) for the first 20 minutes or so after i start driving it, but as it starts to warm up, it gradualy looses power. Once the temp gauge gets around half way, you can already feel a noticable loss of power.
Once it gets to just one mark below the red lvl, the car has lost so much torque that you can floor it just after launch, and the car just hooks up and takes off.
. But after i drove the car for a few days the problem pretty much went away, so i thought that it was just the new ecu getting attuned to all the mods on the engine.
1.What mods do you have?
2. What is the calibration code for the ECU you took out and the ECU you put in, or was the sticker missing?
3.What did the mechanic do to your car on your work order? and what were his reasons to believe your ECM was at fault in the first place?
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