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Old 10-13-2006, 11:43 AM   #1
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Engines shakes bad when AC is on

Whenever I turn on my AC during the summer time the engine shakes alot and seems like the whole car is also shaking when I sti idle. If the I rev it to one rpm then then engine is smooth and does not shake anymore.

This only happens when I have the AC on. Even without the AC on though you can still feel a little bit of shakiness but then I think that is just how a rotor engine is.

My idle rpm is about half or maybe three quarters close to one rpm when sitting idled. I was going to take it to the dealer but did not know how much it was going to cost because I just got done paying my school tuition.

Where should the idle be when your 8 is idled and does it shake bad when you turn on your AC.
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Old 10-13-2006, 12:48 PM   #2
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Old 10-13-2006, 12:51 PM   #3
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Broken motor mount.
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Old 10-13-2006, 12:58 PM   #4
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I guess im going to have to take it into the dealer to have them look at it to see if its just an idle increase that they need to do or if the motor mount is broken.

Thanks guys.
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Old 10-13-2006, 01:06 PM   #5
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yeah, you should not feel the car shake at all, ac or not. the only place you should feel vibration is in the shifter.
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Old 10-13-2006, 01:16 PM   #6
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Yeah, I remembered that when I first bought this car. I had trouble telling if the car was even running or not. I just had my engine replaced though. You would think that they would've noticed a bad motor mount then. Calling service rep now.

Edit: taking it in Monday morning.

Last edited by RotorMotor; 10-13-2006 at 01:19 PM.
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Old 10-13-2006, 01:27 PM   #7
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Hey same thing here, I got rough idle on my engine. They replaced it in the recall like yours and i woulda figured that they would have fixed any mounts that were bad.

Oh and now my clutch is squeaking. throwout bearing?


Its not even worth posting in the 4206F recall thread anymore .
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Old 10-13-2006, 01:36 PM   #8
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Originally Posted by ph0tic
Hey same thing here, I got rough idle on my engine. They replaced it in the recall like yours and i woulda figured that they would have fixed any mounts that were bad.

Oh and now my clutch is squeaking. throwout bearing?


Its not even worth posting in the 4206F recall thread anymore .
Is the squeaking due to the throwout bearing being worn???
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Old 10-13-2006, 03:33 PM   #9
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dunno, i know they took out my tranny when they swapped engines.

I hear if you take the tranny out you should go ahead and replace the bearing (its cheap..?) I'm guessing they didnt.


Oh yeah and i smell burning/hot oil whenever i run my car now, but its not really consuming that much.

I'm gonna take it back in next week. EDIT: Monday morning...

Last edited by ph0tic; 10-13-2006 at 03:43 PM.
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Old 10-13-2006, 03:37 PM   #10
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yeah the TB should always be replaced, its 35 bucks, small price to pay if you ask me.,
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Old 10-16-2006, 07:25 AM   #11
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I experience the exact same problem, only mine is rough without the AC on, just gets noticably worse when it is on. It comes and goes and only happens when the car is fully warmed up. When you are outide the car you can hear a 'popping' from the exhaust like it is missing or backfiring. As soon as you give it any gas at all it is fine. I can see a bad motor mount making it worse in the cabin, but causing the problem? I had a sorta similar issue with my Talon and it was the little servo that moved the throttle plate at idle. Obviously our electronic throttle would not have that issue, just saying.

I have had this problem for some time now and at first I didn't mind but it has been getting progressively worse. When I got the recall letter, I thought great I can finally get this fixed for good. I am still trying, see the 4206 thread. Hope you have better luck with the dealer!
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Old 10-16-2006, 10:46 AM   #12
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broken motor mount is my first thought
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Old 10-16-2006, 11:47 AM   #13
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Dropped my car off this morning and got a call back pretty quickly from the shop foreman giving me crap about the Penzoil 2-stroke oil that I keep under the hood next to the washer fluid resevior. I was in a meeting so I didn't take his call but from the sound of his voicemail it sounded like he thought I was using it as the engine oil. He gave me the whole rundown about how the Renesis uses oil to build compression and that I should call him back immediately if I had any questions. Haha. Think I should bother calling? His exact quote was "we have your car down here and I saw this Penzoil oil and have some serious concerns". I wonder what the dealerships take on premixing would be....
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Old 10-16-2006, 12:49 PM   #14
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my car is doing this and the shaking is getting bad. Need to call up my dealership to make an appointment, thanks guys! (search button FTW!)
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Old 10-16-2006, 06:14 PM   #15
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If you have an auto it is the torque converter. Try moving from D to N. But otherwise, go to dealer.
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Old 10-16-2006, 06:29 PM   #16
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Just got the call from my service advisor to pick up the car. According to him it was a bad spark plug. He said that the reman engines installed in the recall come with the spark plugs already installed so they didn't check them and one of the plugs wasn't firing correctly. He said he had his QC Foreman go over the car and test drive it and that it "got a clean bill of health". We'll see when I go pick it up....
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Old 10-16-2006, 06:59 PM   #17
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yah but it did this before with the original engine and now WITH the new reman. (new reman,... hah oxymoron!)

Anyways its in the shop right now and they shoulda called me by now.. Oh yeah the radiators leaking too, has been since i got it back w/the reman... dunh dun duuuuuHN!!!!
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Old 10-16-2006, 07:20 PM   #18
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Same issue here. Reman replacement ... idles like crap. Pulls strong but idle sux. They are breaking motor mounts when they are popping these things in and out or they are bypassing step 20 of the manual regarding engine replacement which says, and I quote,

"20. Perform the on-road test and verify that there is no vibration or noise."



Back to the shop we go ...
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Old 10-16-2006, 07:28 PM   #19
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Quote:
Originally Posted by ph0tic
yah but it did this before with the original engine and now WITH the new reman. (new reman,... hah oxymoron!)

Anyways its in the shop right now and they shoulda called me by now.. Oh yeah the radiators leaking too, has been since i got it back w/the reman... dunh dun duuuuuHN!!!!
nothing wrong with your car it just got afraid of the earthquake and took a ****!
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Old 10-16-2006, 08:02 PM   #20
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Just got back from the dealership. The tech's notes read:

Quote:
Failed G0102XRX spark plug, R&R - All
2 0000-18-N3Y1 spark plug - trailing

58854 leading spark plug onto trailing side diagnose and inspected for any DTC's prsent. Inpected spark plugs and found one leading spark plug onto trailing side from number 2 rotory. During rotory engine replacement, new reman rotory came with new spark plugs. Replaced two trailing spark plugs and checked rotory engine idle speed for proper operation. Inspected mode 6 drive cycle readings for assurance. Note: please be adviced, found quart bottle of 2 cycle synthetic oil inside engine compartment. It is strong recommended not to use synthetic oil for rotory engines due to higher flash point for burning oil properly. Damage to converter efficiency can result.
I have no idea what a good amount of this means, but they replaced the two trailing plugs. The engine is still not as smooth at idle as it should be. Mine seems to idle around 850-900 RPMs. If I blip it up to 1000, it's perfectly smooth, but there's still a little vibration at its natural idle. Overall, I'm pretty disappointed.
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Old 10-17-2006, 03:28 PM   #21
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Quote:
Originally Posted by RotorMotor
Note: please be adviced, found quart bottle of 2 cycle synthetic oil inside engine compartment. It is strong recommended not to use synthetic oil for rotory engines due to higher flash point for burning oil properly. Damage to converter efficiency can result.


HAHAHAHAHAHAHAHAHAHAHAHAHAHAAHA
d!@#!@#@!#@!#!@#@!%$!#$!@#

Well, they replaced the engine... they should replace the computer next... not flash but physically replace. do that and that should take care of it. if not, then.... its something in the body vibrating, and that would be a real bitch...

Note: Search for rattlehunt...
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Old 10-18-2006, 02:31 AM   #22
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If the vibration only occurs when your air conditioner is on and especially when it's on high, its not the engine - if engine was bad it would vibrate all time, it's not the sparks - they would be bad all the time - instead check the airconditer fan - you have something in the fan compartment like an acorn or small rock - it is messing with the fan and the fan can cause the whole system to vibrate you get to it from the hood area - ask tech for help and after you clear the fan also pull the glove box and check the filter area, you may have a small evil visitor that put the acorn or rock in the fan! Do not kill it! A dead mouse is much worse than a live one, especially in the air conditioner!
Use a glue trap so you can remove it, if caught!

Last edited by Winfree; 10-18-2006 at 02:37 AM.
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Old 10-18-2006, 10:38 AM   #23
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If the vibration only occurs when your air conditioner is on and especially when it's on high, its not the engine - if engine was bad it would vibrate all time, it's not the sparks - they would be bad all the time...!
It vibrates all the time, just worse with the airconditioner on. Thanks for the suggestion though. I'll poke around a bit.

I may be making a bigger deal out of this than is necessary, but I remember when I first got this car how I couldn't tell that it was running when I was stopped at a stoplight because it was so smooth. I just want that back...
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Old 10-18-2006, 08:17 PM   #24
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I remember when I first got this car how I couldn't tell that it was running when I was stopped at a stoplight because it was so smooth. I just want that back...
EXACTLY what I was thinking about my car! Let me know how the dealership visit goes...mine hopefully goes in early next week. s
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Old 10-18-2006, 08:21 PM   #25
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Didn't work out. I've heard good things about grounding kits smoothing out the idle so I ordered one today. We'll see how that goes.

My best guess is there's still a busted motor mount, but the dealership claims there's not.
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Old 10-18-2006, 08:21 PM
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