Passat (B7) :: 1.8T - High Idle On Startup
Sep 19, 2015
Even on a warm day, when I "cold start" the car....the revs hang high for a long time....at least a good minute or two. This is my first PZEV(VW) engine though--CPRA--so I'm assuming it's for the emissions? With the intake & exhaust I have on...it's obviously A LOT more noticable.
For the first 10-15 seconds, there is a HUGE sucking sound for the SAI pump and then that shuts off....but then it still screams along at 1,200-1,500 RPM's for another minute or two until it'll FINALLY settle down to idle.
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As the weather is getting colder I noticing again my RPM's taking longer to drop down to 1200 or less. Upon startup the engine rev's to 2000 and drops in 2 sec quickly to around 1500 (all these are based on the crude gauge readings, not a digital tach).
I don't like high RPM cold starts in the first place and why its stays just around 1500 and lower for about 2 minutes before it lowers to around 1200RPM. I don't like engaging the transmission at those high RPM's. My other vehicles did nothing like this and the increased start RPM was down 1000 within a minute.
What sensor is having the computer run it like that and not let it drop faster. I doubt its the O2 sensor since its the same on a hot day just doesn't rev up to 2k but 1500 or so. Jabs at the gas pedal doesn't work it drop any sooner either.
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I've got a 2003 ford f-150 with a 4.6l 150000 miles. when it is started the rpms are at 2000 for about a min. and a half then it drops to normal when its started cold. when started at operating temp. The rpms are at 2000 for about 30 to 45 sec then drop to normal. The iac, upper and lower intake gaskets, intake run controller valve, dfbe, low intake and shield, coolant temp. sensor, intake air temp. sensor, egr, egr regulator valve, maf, ecm have all been swapped out no vacuum leaks all line in good condition tps voltage reading of 0.84v...
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2004 Santa Fe .... 2.7 6 Cyl 4WD 150k miles
Recently I started experiencing RPMs surging upon startup and driving before my engine warms up. The problem has gotten worse to where I push on the accelerator the RPMs jump to 2700 and the transmission feels like it disengages. My initial thought was the tranny was going bad and slipping. I checked the fluid level in the T and found it was maybe a half Qt. low. I topped it off, but this had no impact on the problem. On a side note, I am able to use the manual shifting feature on the "His and Hers" Shifter and drive the vehicle without any issue. Transmission works fine in manual. The surging RPMs which only occur in Automatic mode, triggered the CEL and I got a code of P0123 which is high side voltage on the Throttle Position Sensor. I replaced the gray TPS with a new black one.
Upon startup the RPMS jumped to 3000 just sitting in Park. I disassembled and reinstalled figuring I had something bound in the throttle. After reassembly the idle went up to 2200, still no good! I reinstalled the original gray TPS and the RPMs, upon starting, RPMs were 1500 with the old sensor...still too high. I did reset the ECU twice during the process of putting in the new sensor and reinstalling the old sensor. Right now I found that when I disconnect the TPS electrical connector, the engine runs normal. It starts right up with the TPS totally disconnected and idles at 750 RPMs! It will not shift to 2nd gear though, when I try to drive it in Automatic Mode. I can however drive in Manual Mode and drive normal and shift right through the gears. Who needs automatic mode right?!!!
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I'm the loving owner of an amazing '02 RSX. She is just about to hit 100K, and has been completely trouble free. This past sunday, I started it up in the morning and immediately noticed a semi-harsh vibration, with high idle speed (1500ish, normal is 500). If I give it gas, the vibration and rumble noise goes away, but if it put it in reverse, it seems to get worse. After a few miles of driving, the idle speed returns to normal and seems to feel/sound fine. Also of note, if i hit a dip in the road, i get a vibration and engine sound that resembles that of a flat tire. I know this sounds random, but it's the best I can do at describing it. There are no check engine lights, temp is fine, and otherwise seems to be driving great. I initially thought bad spark plug or air filter, but have since thought of vacuum pressure or O2 sensor, maybe even an engine bolt break (from the sound it makes driving into a dip). Could this be as simple as getting a bad batch of gas?
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My question is what could cause a high idle?I have a 95 Chevy pickup 4x4 with a 5.7... Recently the lower radiator hose fell came off the radiator, dumping the liquids all over the street. The motor shut down, and every time we went to start it there would be a loud whining/spinning noise. We thought that the motor seized, so we pulled the plugs, turned the motor by the crank bolt.Turned out that the starter went bad, the spindle and bendex werent catching on the flywheel.
After examining the flywheel teeth, and gapping the plugs to the recommended manufacture gap, (they werent when we pulled them), we got a new starter installed. It started right up! But it ran at a high idle, around 1500-2000 RPM. I did not have a chance to really let it warm up (it was cold and raining). Now there is a gray flexhose that is running from the air filter housing down to the exhaust manifold. If i remember correctly, it was not seated very well when I took it off. Could it be causing too much of a vacuum?
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Per the instructions I used upfitter #4 and a 21k resistor. High idle works, slight delay and gradual ramp up to 1150 rpm, but why does the wiper turn on for just one wipe now at startup?
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I had my license revoked for a year so my baby had sit for a year with know one to drive it.. now before i had to put her in storage she ran fine no problems what so ever.. I would time to time start her up for a while over the winter but because of family problems there was a time where she sat for couple months without starting and letting her run. Now when i had the time to do it it was like i walked up and got into a whole different car, here is what i got going on....
Go to start it up and she will idle up to 600rpms then die out i would have to give it gas to try to start her but the thing is i can only go up to 2k rpms or it will just auto drop down to about 800rpms. i would usually have to floor it all the way to even get it to stay idle by her self its not as bad anymore but still does it. Also it smells like gas like crazy when it starts up,i had a half of tank when i kept her in storage so idk if its just bad gas doing this but seems like a lot of problems just for having bad gas in it, and she puts out smoke white smoke..now i know shes running rich because me and a buddy looked into it. also there is a crazy sound since shes been sitting that has never happened before it sounds almost like the belts need to be lubed up but the belts are fine and its loud from under the front bumper my friend said he thinks i blow my turbo but I don't see how that could be just from sitting for time to time.. the car and motor has a shake to it as well.
I tried to drive her up and down my hill a couple times to see if i can just break some cob webs loose or anything but you give her gas she barely once to go and if she does she get to 2k rpms then die down and hardly moves and if i floor it to the ground it takes a bit to get up and going but then drives seeming like nothing was wrong. I have never had any of this issues before I put her for storage and now i have 4 weeks till I get to roam the streets again but sadly my b5 is dying on me.
Motor specs: Stock 1.8t 75k miles 5 speed tiptronic 1999....
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Came to a stop at a loooooooong light the other afternoon. I popped the AT into neutral, and the engine idle rose to around 2000 RPM, dropped to about 1500, then started cycling in that range. CEL also showed up.
Now, whenever the transmission is in either P or N, if I blip the throttle to bring the RPMs into that range (1500-2000), it stays in that range and cycles up to 2000, drops to 1500, wash, rinse, repeat. Blipping the throttle above 2000 does not change this behavior... as soon as the RPMs drop back to 1500, zoom it goes, right back to 2000.
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I bought my 3.6 in november with 2k miles on and now have 15k, in the last month or 2 I've noticed that at odd times it idles high. It normally idles at 500-600 id say and will randomly peak to 1000-1100. It wouldn't really bother me except it sounds like hell and I have to practically stand on the brakes for it not to jump forward. I've had 13k miles and 6 months of problem free driving
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The other day when it was raining out my car started idling below 1,000RPM/running rough. I was thinking it might be the coils, so I changed those, cleaned out my TB (Throttle Body), did a TB alignment (with VAG-COM) and now my car is idling at 1,200RPM and jumping up to about 1,600-1,800RPM, like I'm constantly revving it. I even swapped out my whole TB from my A4 and it still does it! If I disconnect the throttle position sensor it seems to idle normal.
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My buddy just bought a vr6 2001 and it has a problem! the previous owner said it had an oil leak and didn't notice it until it started ticking! ok not a big deal! we changed what was left of the oil with semi synthetic 5w20, and put a new filter on it! figured out that the oil was leaking out of the filter gasket , how he didn't notice is beyond me! now the ticking has gotten quiet BUT now it idles high! there is now CEL and the previous owner said it did not do it before the ticking! so my question is how did running low on oil, and POSSIBLY messing up a lifter or two cause it to be idling high? It only idles high in park between 1 and 2000 rpm!
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When I start my car now, it will idle up to about 1900 rpm, then idle down from there (even when engine is warm!). Also, I drove about 30 minutes, and a guy in a lancer decided he wanted to race me, but it seemed like I wasn't getting all the power I should! I tested this theory in an empty parking lot, where I found that my tires wouldn't brake free even at high RPM with stage1. This has never happened before, and I am a little worried at this point. My mod list is in my cig below in case your wondering, of if that makes a difference. What should I look for.
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The notorious 3.6 high idle has haunted me for over a year now. When it first started happening, I thought it was a temporary thing. It has been happening for a year now and the stealership has not been able to diagnose it. It has started happening more frequently now, no matter the weather. The idle overall is just rough. I place the car in neutral sometimes at a red light because the vibration and idel is so rough. The transmission is sluggish, and as i come to a stop sometimes, i can feel the rough downshifts it makes from gear to gear. And just today, after I picked up the car from the dealership from a failed diagnosis of the high rev problem, my parking sensors stopped working. When the system turns on(car in Reverse), there is a steady beep even while there is nothing behind me. Even as the car is moving(below 10mph) the car makes three beeps, every five seconds or so. I do not know what to do. I have a feeling that even if I take it to a different stealership, I will get the same results.
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I have searched a decent amount on this and it seems like there is a whole list of items that could cause these problems. The car is a 2008 Passat 2.0T with the tiptronic. It is the early 2008 so it still has the FSI motor. It only has 53k on it and literally just came out of warranty a month or two before this all started happening.
It all started with the CEL coming on and the went into limp mode. We shut it off and turned it back on, the car went into limp mode again but upon the 3rd restart the car started and ran just fine. Then for a few weeks we just had a CEL (I don't know what code it was because I never scanned it at the time). Now as of lately the car is have a terrible rough idle, and at stops it will start kinda shaking and lurching forward. Sometimes it will also have a noticeable misfire upon start up. Also after going at highway speeds for some time the car will start to produce a squealing noise when not producing boost.
A few days ago I scanned it and these codes came back:
P0110
P0101
P0102
P0104
P0108
P0171
The first 5 IIRC are related to misfires and the P0171 is a lean code.
At first I thought this was the PCV valve because I had read about the lurching and the squeal that someone else had from that but after reading up more on things I am worried the P0171 is from the cam follower.
At this point I am just very tired of hearing my wife constantly complaining about the car. I want to try and figure this out without throwing part after part at it. I can't afford to buy items just to find out they aren't fixing it.
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Recently, when I start my Golf 2.5 DSG it has been revving a little loud or rough. It usually revs at under 1k at idle, but when starting up it revs at around 1500 until I put it in drive and release the footbrake.
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Car wouldn't start, would just kind of do a high pitch whining. Bought new battery and still does it. It might crank right up or take up to 5-6 times. I'm a second owner and I believe it is the starter.
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When I start my '05 Camry (4 cyl - SE) it revs up to 2K, though only briefly. I don't like to go over 1,000 rpm until it's warmed up. Toyota dealer says that's normal ... Would it hurt to try it with the cold start (water temp) sensor unplugged ?........
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My F150 at startup is reving real high, almost max rpm's, like the pedal is on the floor. What could be going on?
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I have a 1998 Chevy Blazer (2WD) with 115k miles. When I turn the key and start the car, the RPMs rev up really high for about 4 seconds and then drop down real low until the car dies. All in all this is about an 8-second process, and it sounds like I'm flooring the accelerator when, in fact, I'm not even touching it. The Blazer just started doing this, but previously for about the last few months about once a month, when I would start the car I would get a loud backfire sound which sounded like it came from under the hood (driver's side), and this was followed by the smell of exhaust coming into the cab through the AC vents. How to go about diagnosing this since I'm unable to drive it to get the codes read
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1996 Ranger 2.3 140 CID XLT 126,000 Miles. When coming to a stoplight or stopping the engine idle is low and causing engine to almost die. Engine has been stuck at high idle a couple of times. It started with the engine idle slowly coming down and now it its too low. I suspect the Idle air control valve.
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