After tune, A/C having issues
Mar 30, 2013, 05:25 PM
#1
After tune, A/C having issues
Is there anything in V7 that that would cause my A/C compressor not to run at a standstill? A/C works great when car is rolling, but when you come to a stop, the compressor stops as well.
It all worked great before I was tuned.
It all worked great before I was tuned.
Oct 15, 2013, 07:52 PM
#5
My A/C issue was caused by getting my car tuned. I have no idea why, or what happened, but after yet another re-tune my A/C is working as designed.
I've concluded that either something happened during the download of the ROM or during the flashing process. It is fixed now and that is what I care most about.
Sometimes weird things happen when flashing the ECU. Please note this the next time someone asks if it could be caused by getting their car tuned. The answer is yes, yes it could be caused by that.
I've concluded that either something happened during the download of the ROM or during the flashing process. It is fixed now and that is what I care most about.
Sometimes weird things happen when flashing the ECU. Please note this the next time someone asks if it could be caused by getting their car tuned. The answer is yes, yes it could be caused by that.
Oct 15, 2013, 09:03 PM
#6
Glad you got it resolved.
When I saw this thread today (I know it's old) I immediately thought of the AC Limits table. But I don't see how this table can make it do that. Perhaps somehow the TPS was reading incorrectly (just grasping at straws).
When I saw this thread today (I know it's old) I immediately thought of the AC Limits table. But I don't see how this table can make it do that. Perhaps somehow the TPS was reading incorrectly (just grasping at straws).
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Oct 19, 2013, 06:46 AM
#9
Problem had nothing to do with this. It was ECU related. By the time I posted here, I had looked at all of the normal A/C issues.
A/C didn't work at speed 0. RPM didn't matter, throttle position didn't matter. If the car wasn't rolling, the A/C compressor clutch wasn't getting power from the ECU.
Problem started after getting tuned.
After exhausting all other possibilities, I determined it was a problem with the computer. I went back to the tuner. He had never heard of this problem be for and researched it himself. He wanted to try a 3d SD tune for other issues I was having. I said sure, but put a base map in and we'll check the a/c operation. He did. We started up the car and the a/c was working at speed 0. No other changes were made. Just new tune. I concluded that something happened during the download of the ROM or during the upload to the car. I work at a dealership and we have issues all the time during programing so I know it happens.
Oct 19, 2013, 07:18 AM
#10
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This is sorta what happened to my car only worse
Once I went SD and dual map e85/91
With fic 1650 injectors and a single pump
On e85 the car was flawless at idle with AC on and at all times
But with the 91 flash... If I came to a stop with the AC on the car would shut off.
And I mean every time... So it would work driving, but if I left it on it would kill the car.
Sadly it was becuz my tuner could not seem to steady out the 1650 injectors on 91 to hold the idle with the AC going.
So I guess I wish I had your problem lol
But after new injectors and new tune, all is well.
Once I went SD and dual map e85/91
With fic 1650 injectors and a single pump
On e85 the car was flawless at idle with AC on and at all times
But with the 91 flash... If I came to a stop with the AC on the car would shut off.
And I mean every time... So it would work driving, but if I left it on it would kill the car.
Sadly it was becuz my tuner could not seem to steady out the 1650 injectors on 91 to hold the idle with the AC going.
So I guess I wish I had your problem lol
But after new injectors and new tune, all is well.
Oct 19, 2013, 08:40 PM
#11
Problem had nothing to do with this. It was ECU related. By the time I posted here, I had looked at all of the normal A/C issues.
A/C didn't work at speed 0. RPM didn't matter, throttle position didn't matter. If the car wasn't rolling, the A/C compressor clutch wasn't getting power from the ECU.
Problem started after getting tuned.
After exhausting all other possibilities, I determined it was a problem with the computer. I went back to the tuner. He had never heard of this problem be for and researched it himself. He wanted to try a 3d SD tune for other issues I was having. I said sure, but put a base map in and we'll check the a/c operation. He did. We started up the car and the a/c was working at speed 0. No other changes were made. Just new tune. I concluded that something happened during the download of the ROM or during the upload to the car. I work at a dealership and we have issues all the time during programing so I know it happens.
A/C didn't work at speed 0. RPM didn't matter, throttle position didn't matter. If the car wasn't rolling, the A/C compressor clutch wasn't getting power from the ECU.
Problem started after getting tuned.
After exhausting all other possibilities, I determined it was a problem with the computer. I went back to the tuner. He had never heard of this problem be for and researched it himself. He wanted to try a 3d SD tune for other issues I was having. I said sure, but put a base map in and we'll check the a/c operation. He did. We started up the car and the a/c was working at speed 0. No other changes were made. Just new tune. I concluded that something happened during the download of the ROM or during the upload to the car. I work at a dealership and we have issues all the time during programing so I know it happens.
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