Puzzling Issue for the Experts
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Puzzling Issue for the Experts
Hey guys, I've got a 03 VIII with 55k miles on it.
Recently, I've developed a strange issue with the A/C. When the car is idling, I turn on the A/C and the car's idle falls drastically. For example: If I'm going on the freeway at 70mph and push in the clutch with the A/C on, the car will stall out. No matter what gear I'm in the problem re-occurs when the engine falls to idle.
To top if off, if the A/C is on and the car is idling, it will actually stall out and die. It seems that once the A/C is turned on that it drags the engine down badly. Feels like it has such a load on the motor.
Just for reference, the A/C works wonderfully as long as I'm in gear at any RPM other than idle. If I'm crusing at 70, the A/C will do just fine - blow ice cold air. Also, the car is throwing no codes whatsoever, so I'm unsure which direction I should take to solving this weirdo problem.
The car has a 12" Kicker CompVR in it powered by a KX600.1 amp. Not so sure this would be important, but i figured I'd toss it in there just incase it could be relevant. Also the car has been tuned for the 264/264 cams it has in it. Once again, doubt it's relevant but I figured I would address this.
One time, when the car stalled out, it threw a check engine light. I scanned it and the code showed up as cam position sensor & crank position sensor. I'm assuming this is because it stalled out so abruptly. I cleared the codes and they have never returned.
I searched the forums looking for similar issues to no avail. If any of you guys have any ideas on where I could start looking for a solution to my problems, or if anyone has had similar problems, let me know. I'd definately be greatful.
Thanks in advance!
Jared
Recently, I've developed a strange issue with the A/C. When the car is idling, I turn on the A/C and the car's idle falls drastically. For example: If I'm going on the freeway at 70mph and push in the clutch with the A/C on, the car will stall out. No matter what gear I'm in the problem re-occurs when the engine falls to idle.
To top if off, if the A/C is on and the car is idling, it will actually stall out and die. It seems that once the A/C is turned on that it drags the engine down badly. Feels like it has such a load on the motor.
Just for reference, the A/C works wonderfully as long as I'm in gear at any RPM other than idle. If I'm crusing at 70, the A/C will do just fine - blow ice cold air. Also, the car is throwing no codes whatsoever, so I'm unsure which direction I should take to solving this weirdo problem.
The car has a 12" Kicker CompVR in it powered by a KX600.1 amp. Not so sure this would be important, but i figured I'd toss it in there just incase it could be relevant. Also the car has been tuned for the 264/264 cams it has in it. Once again, doubt it's relevant but I figured I would address this.
One time, when the car stalled out, it threw a check engine light. I scanned it and the code showed up as cam position sensor & crank position sensor. I'm assuming this is because it stalled out so abruptly. I cleared the codes and they have never returned.
I searched the forums looking for similar issues to no avail. If any of you guys have any ideas on where I could start looking for a solution to my problems, or if anyone has had similar problems, let me know. I'd definately be greatful.
Thanks in advance!
Jared
#2
It could be your cams giving you the bad idle with the AC on. How long have you had them? Also, I would check to make sure that the pully on the AC compressor to make sure the bearing is ok.
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The cams have been in the car for about 30,000 miles or so. However, I just had it retuned not too long ago. It seems like the issue has started since the tune, or after the stereo install.
The tune and the stereo is the only thing that has been changed since this weird issue has started.
Good idea with checking the pulley. There isn't any noticable noise with the A/C on, but it wouldn't hurt to check with the car turned off by spinning it. I'm going to try that.
Once again, thanks for the reply.
Anyone else have any ideas?
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Haha, that's funny because I "almost" never use the A/C. Which is probably what took me so long to discover the issue.
I go to school 100 miles away from home and like to use the A/C on the highway. I really don't use it around town which is where I mainly use the car at.
Thanks for the advice though!
I go to school 100 miles away from home and like to use the A/C on the highway. I really don't use it around town which is where I mainly use the car at.
Thanks for the advice though!
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well if you have stock injectors there wouldn't be any reason for the tuner to mess with the injector latencies within the tune so that's probably not the issue. however, if you want to send me your rom I'll take a look at it for you and I'll verify that it has the stock latencies so you can rule that out and move on.
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One time, when the car stalled out, it threw a check engine light. I scanned it and the code showed up as cam position sensor & crank position sensor. I'm assuming this is because it stalled out so abruptly. I cleared the codes and they have never returned.
Thanks in advance!
Jared
Thanks in advance!
Jared
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Thanks for the advice CO_VR4. I'll check these just to be sure. Everything runs so perfect though. The car runs really strong and does well with everything other than the A/C. I doubt this would be relevant, but I'll look into it anyways.
Once again, thanks for the advice!
Once again, thanks for the advice!