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stupid dumb problems with this IS
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Joined: Jun 2010
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From: pa
stupid dumb problems with this IS
Ive got the lemons of all lemons or just the worse luck. Once i fix one thing something else pops up. Ive changed the ps rack, ps pump, water pump and belts cost me a fortune. All was good for a couple days until i turned on my AC. i feel a rumble underneath my seat and a noise in my engine. Feels like my car is goin to shut off. Think its from the exhaust im not sure. i have no clue about cars. on top of that toyota messed up my steering wheel after i got ps alignment done to it since the wheel was off after ps rack was in stalled. Luv my IS get alot of compliments i want to get past these dumb repairs and do stuff to my car that i want to do like lowering, new rims and new headlights. If anyone can chime in with any advice about why my car acts up when AC is on Let me know i desperately need it.
thanks Guys
thanks Guys
Joined: Jun 2007
Posts: 819
Likes: 1
From: West Virginia soon to be Virginia
exactly, at idle the engine will drop in rpms some due to engaging the ac compressor, if it drops too much you may need to up your idle speed.
btw where in pa are you?
btw where in pa are you?
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From: pa
thanks ill check it. in the garage now gettin aligned since toyota messed up my ps alignment. i got this local garage near me called Tiremart fixed up my alignment perfect and asked me what toyota was doing with it. toyota claimed it couldnt do it cuz they would have to remove the power steering rack which is why it was still crooked. took it to tiremart fixed the alignment in 40minutes no probs
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Joined: Jul 2010
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From: Virginia
your RPM's are naturally going to drop when you turn your a/c on because you are putting a load on your voltage system that was not there before, so when you turn it on it is not uncommon for the RPM's to drop to 500 RPM, but in a few seconds it should bounce back up to about 7500 or 850 RPM as your voltage sytem has compensated for the a/c being turned and the compressor being engaged, so if you RPM's aren't jumping back up you might need to adjust your idle, what does it idle at normally? Also could be a problem with your idle air control, maybe a vacuum leak on your intake or a bad idle air control valve? check these posibilities out.
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Lead Lap
Joined: Jul 2010
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From: Virginia
your RPM's are naturally going to drop when you turn your a/c on because you are putting a load on your voltage system that was not there before, so when you turn it on it is not uncommon for the RPM's to drop to 500 RPM, but in a few seconds it should bounce back up to about 7500 or 850 RPM as your voltage sytem has compensated for the a/c being turned and the compressor being engaged, so if you RPM's aren't jumping back up you might need to adjust your idle, what does it idle at normally? Also could be a problem with your idle air control, maybe a vacuum leak on your intake or a bad idle air control valve? check these posibilities out.
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Joined: Jun 2010
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From: pa
i checked this morning with that car in park and the rpms stayed steady when the ac was on. my guess is its related to the aftermarket exhaust but that is just a guess with nothing to back it up.
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From: pa
also, there is always the possibility that your a/c compressor is starting to go and about to lock up, which would mean you would need to replace your ac compressor with new or used, but this seems like a very unlikely possibility because your RPM's are affected by it and if your a/c compressor was bad it shouldn't affect your RPM's it should just make horrible noises, and if it locks up it will just rip your belt in two, and at that point you car will run until the battery dies as there is no belt there to turn your altenator to charge the battery, but like i said an unlikely possibility since your RPM's are affected when you turn the a/c on, hope this helps.
wow that would be a nightmare. i already spent 3k in repairs and maintanance
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Joined: Oct 2009
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From: TX
My idle rpm with A/C off is 750 -900 approx.
with A/C on its almost always at 1000 rpm, but very occasional its as low as 900 rpm approx. when the car is warmed up.
If your idle isn't in spec then fix that first.
with A/C on its almost always at 1000 rpm, but very occasional its as low as 900 rpm approx. when the car is warmed up.
If your idle isn't in spec then fix that first.
Joined: Jun 2007
Posts: 819
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From: West Virginia soon to be Virginia
youll find that lexus owners on here and other forums are all a pretty tight knit group and like to help each other out, like I chill with the guys from Northern Virginia a good bit and we do garage meets where we all meet up and do work on each others cars and stuff so get yourself a good local group and youll be taken care of