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Old 04-23-2013, 06:27 PM   #1
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HELP!!

My engine has seemed to be working extra hard and almost shaking at idle. The idle is normal 650 but it almost feels like its cammed cause the car shakes and its worrying me. Anyone have any clue what it could be?? Please help anything helps.
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Old 04-23-2013, 06:41 PM   #2
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What mods do you have? Is it tuned?
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Old 04-23-2013, 07:01 PM   #3
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A CAI and pype bomb axle back no tune
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Old 04-23-2013, 07:04 PM   #4
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And the CAI is all tight, no leaks? Is your check engine light on?
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Old 04-23-2013, 07:05 PM   #5
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No leaks checked and no DTCs yet either.

---------- Post added at 06:05 PM ---------- Previous post was at 06:05 PM ----------

Well is there a positive way to check for leaks? I dont think there is
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Old 04-23-2013, 07:09 PM   #6
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Check your fittings on your CAI. One of mine came loose once and the tube slid out enough to suck extra un-metered air and my idle did something like your Mustang is doing.

---------- Post added at 08:09 PM ---------- Previous post was at 08:07 PM ----------

Maybe you got some 'bad' gas?
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Old 04-23-2013, 07:15 PM   #7
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Check your fittings on your CAI. One of mine came loose once and the tube slid out enough to suck extra un-metered air and my idle did something like your Mustang is doing.

---------- Post added at 08:09 PM ---------- Previous post was at 08:07 PM ----------

Maybe you got some 'bad' gas?
Thats why I only put shell V-Power 91 gas
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Old 04-23-2013, 09:20 PM   #8
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Thats why I only put shell V-Power 91 gas
And your car requires 91 lol and since ive got the car ive only put in 91 NOTHING else.
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Old 04-23-2013, 10:18 PM   #9
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And your car requires 91 lol and since ive got the car ive only put in 91 NOTHING else.
But do u put ****ty gas? Or good stuff?
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Old 04-23-2013, 10:25 PM   #10
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But do u put ****ty gas? Or good stuff?
Only shell
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Old 04-23-2013, 10:35 PM   #11
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Only shell
Oh thats good sh*t then
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Old 04-23-2013, 11:45 PM   #12
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Probably a bad tank of gas that happens a lot if you use anything less than 91
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Old 04-23-2013, 11:46 PM   #13
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Probably a bad tank of gas that happens a lot if you use anything less than 91
Ive filled up 2 already
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Old 04-23-2013, 11:47 PM   #14
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Hm so the whole car shakes or its vibration? Have you checked your air to fuel?
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Old 04-23-2013, 11:54 PM   #15
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My car vibrates all the time, you said something about pype bombs so if you modded your exhaust that's the pipes being so close to the bumpers/undercarriage.

My car always vibrates at those RPMs until I give it some gas which tweaks the exhaust a bit away from the bumper. Metal shrinks and expands so.

My boyfriends BMW does it as well, he saw his exhaust tip a bit low so he had it pulled up, now he complains it shudders as much as mine while idling. Poor luxury boy

When I put my intake in it was rattlin too, be sure to bolt it down as much as you can without blockage. Some 3M or block caging is good.
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Old 04-23-2013, 11:56 PM   #16
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My car vibrates all the time, you said something about pype bombs so if you modded your exhaust that's the pipes being so close to the bumpers/undercarriage.

My car always vibrates at those RPMs until I give it some gas which tweaks the exhaust a bit away from the bumper. Metal shrinks and expands so.

My boyfriends BMW does it as well, he saw his exhaust tip a bit low so he had it pulled up, now he complains it shudders as much as mine while idling. Poor luxury boy

When I put my intake in it was rattlin too, be sure to bolt it down as much as you can without blockage. Some 3M or block caging is good.
Its not the exhaust hes had pypes for months before this happened.
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Old 04-24-2013, 12:00 AM   #17
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Could be your driveshaft or trans. Do you have an auto or manual?
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Old 04-24-2013, 12:30 AM   #18
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Could be your driveshaft or trans. Do you have an auto or manual?
It happened after his CAI
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Old 04-24-2013, 12:31 AM   #19
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Probably air/fuel mine did that it made the idle ever so different to set it off
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Old 04-24-2013, 12:40 AM   #20
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I'm with primer, Cai is probably sucking air.
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Old 04-24-2013, 01:19 AM   #21
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I'm with primer, Cai is probably sucking air.
We keep going over it and we tighten it all down but his car still vibrates
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Old 04-24-2013, 01:26 AM   #22
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To me it sounds like a bad 02 sensor, but that would throw a cel.
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Old 04-24-2013, 01:44 AM   #23
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At this point I think his car is gna blow up in a catastrophic meltdown lol jk chris haha
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Old 04-24-2013, 02:23 AM   #24
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Check spark plug gapping. Timing can cause odd idle. Sucking in too much air will throw a CE light... Timing might not do that. Did he power wash his engine? Suck in water in his CAI? The exhaust won't cause a rattle that will vibrate a car. It would just be a rattle.
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Old 04-24-2013, 02:32 AM   #25
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Check spark plug gapping. Timing can cause odd idle. Sucking in too much air will throw a CE light... Timing might not do that. Did he power wash his engine? Suck in water in his CAI? The exhaust won't cause a rattle that will vibrate a car. It would just be a rattle.
Nope the guy has never washed his engine in over two years its gross under the hood lol ill check the gapping on acouple plugs
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Old 04-24-2013, 02:34 AM   #26
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Can't remember, did you say the cel does work ?
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Old 04-24-2013, 02:38 AM   #27
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Don't just check a couple, Charlie. If a single one is off by even .01, it could cause a rough idle. Unlikely at that small of a gap, but it could. And if one is off by more, it most likely will cause misfiring issues. So, I'd check all and make sure they're all good, just to be sure.
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Old 04-24-2013, 06:09 AM   #28
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If this happened after the CAI install, then remove it and reinstall the stock air box. If the problem goes away, you have the culprit. Once removed, inspect the CAI kit carefully for any cracks in the plastic, any fittings you did not connect properly (the automatics have one additional tube that connects to the intake tube), and check the rubber couplers.

Who is the manufacturer of the CAI?
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Old 04-24-2013, 10:34 AM   #29
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Don't just check a couple, Charlie. If a single one is off by even .01, it could cause a rough idle. Unlikely at that small of a gap, but it could. And if one is off by more, it most likely will cause misfiring issues. So, I'd check all and make sure they're all good, just to be sure.
Ugh guess ill rip apart his engine :p
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Old 04-24-2013, 10:56 AM   #30
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What are they gaped at is the question?
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Old 04-24-2013, 11:13 AM   #31
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What are they gaped at is the question?
Stock bro. Besides cai and axlebacks the car is stock
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Old 04-24-2013, 11:27 AM   #32
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Well I I know that but I'm saying look what they are gaped at I had to regap mine from the factory
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Old 04-24-2013, 11:44 AM   #33
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Well I I know that but I'm saying look what they are gaped at I had to regap mine from the factory
That's what I was saying, Charlie. Might be a factory fault.
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Old 04-24-2013, 11:47 AM   #34
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Well I I know that but I'm saying look what they are gaped at I had to regap mine from the factory
Alright ill tell chris we gotta rip apart his engine lol thanks for the info
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Old 04-24-2013, 12:06 PM   #35
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Don't have to rip it apart... Just pull the spark plugs.
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