Golf IV R32 :: Misfiring At Part Throttle Whether Car Is In Gear Or Sitting
Mar 17, 2012
Getting a misfire at part throttle. Whether the car is in gear or sitting. At idle there is no misfire, and at WOT there is no misfire. But if you hold the throttle part way (like when trying to cruise) you immediately see the misfire count go through the roof on vag-com. this can be duplicated in the garage by holding the idle to 1500-2k with no load on the motor.
4 codes, which come back immediately at part throttle as described above.
multiple cylinder misfires
cylinder 1 misfire
cylinder 2 ""
cylinder 3 ""
tried moving plugs and coils with no change, problem stayed on first 3 cylinders
checked t-body readings and appears to be aligned ok
checked maf readings and appear to be ok
found one questionable vacuum line and replaced it, no change.
checked vag-com fuel trims and they showed -4.7% which appears to be with in the acceptable 5% range
watching lamda on both front O2 sensors and they seem to be following the same trend.
When I look at measuring blocks 26/27 it shows me knock sensor signal on all six cylinders, and 1-3 are much lower than 4-6. This is the only discrepancy I have located, and not sure if it is the cause or an effect of the problem. I checked the knock sensor (located below exhaust manifold on passenger side) and the sensor and wiring appear good. I checked resistance best I could and it appears in spec (infinite resistance) but the pins are so small and the spec is so vague I am not 100% on the results.
I have vag-com and a full shop access, but no R32 specific bentley unfortunately. I only have the older (up to 2002 I think) MK4 manual but that only covers the 12v. Looking for the wiring diagrams for the coils or knock sensor harness'...
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Started my car this morning to warm it up, idled for ~ 20min. weather conditions. I returned to my car, and it was misfiring and threw the p1545 throttle body code. There was a mk5 tsb for a similar problem involving wiring. 49k miles, stock tune, w CTS catted dp.
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1997 expedition 4.6 .... Figured its the same motor. I bought it for cheap with a bad miss fire not sure what cylinders just did a tune up. I forget but I think they were motorcraft spark plugs I put in. But after that it ran grate so I thought. It would be intermiten but would all of a sudden while accelerating get a boost of power. That would last untell its next shift point and would always happen around 2-2500 rpm. Kinda like VTEC in a honda. Or it gained 2 cylinders. And would also start stumbling while sitting at a stop light for two long with it in gear and break on only after its warm. Never happens when cold. I hooked up tourqe and saw when it does it its misfiring on 5-6-7-8 randomly. Its missing on cylinder 4 all the time now which I believe is a plug, wire, or water-antifreez in plug hole.
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I recently bought a used 05' prius, and discovered a flutter sound (sounds like uneven tire) while on a smooth road. It comes from the engine compartment. I has no clue what IT can be.
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I finally decided to take my car in to the dealership for this random split second hesitation that mostly happens in first gear. I have 8600 miles on the car and it has done it since the day I bought it. I thought it might have been compressor related from running the AC. I have tried driving with no AC and ESP off and it still does it.
So I take it in and they decided to let the new guy work on my car. I take him on a ride (AC and ESP off) and sure enough it does it nice and strong for him to feel it. I was happy so we went back to the dealership and they gave me a 2.slow rental and I was on my way. 24 hours later they call and tell me, "Ron we believe it might be your throttle body so we're waiting on the regional master tech to get his opinion before we put a $750 part on your car".
I'm like "ok, whatever you say, just call me tomorrow with an update because I don't want it back till it's fixed". They call me the next day to inform me that my brake light switch was faulty ($10.25), they replaced my wiper blades, adjusted my wiper arms and the car was ready to be picked up.
Now that I have it back I can say driving it now that it's acting normal is an adjustment. My mind expect that hiccup but it doesn't happen, at least not most of the time. I'm not completely convinced that this hesitation is gone because I think I felt it happen once yesterday. Time will tell... In the mean time it is 95% cured.
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Posting this because I saw many other owners with the same problem. Basically after warming up DSG every time clunk into 6th gear on light throttle and D mode, speed around 50kmh rpm around 1400.
You can hear it and feel it on pedal a little. Sometimes is not so harsh sometimes its big clunk. Of course it did on manual mode too if you try shift in the same position.
Original thread here: [URL] ....
Its well known that DSG D mode is set to shift early for better fuel economy but this is not good and really annoying.
I have same problem and its not mechatronic related mine was replaced do to jerkiness on 2 gear and clunking into 6th it is the same.
So I know that fix could be DSG tune/reprogram that many company offer. D mode is optimized and shifting moved to "normal" rpms. A lot of you don't have even problem because your its already flashed with combo etc.
But in my area no body offer DSG tune and i really don't know how to solve this problem... don't want to replace whole gearbox because in all other ways works ok.
I have 2012 MU with i think lastest SW and it didnt change anything on this.
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Whenever I completely engage the clutch after shifting into 5th, there car bogs for a second if I give immediate throttle after shifting. It doesn't happen if I wait a second or when driving in fifth gear.
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I had something weird happen to my DSG today. I was accelerating from a stop light in manual mode until third gear at half throttle then shifted to 'Drive' at about 45 MPH. The transmission kept shifting back and forth from drive to manual. The MFD gear display kept switching from S to D every few seconds at light throttle. The mode selector was set to normal on the radio display. I turned into a parking lot, shut the car off, and then restarted. Once restarted, the DSG returned to operating normally. The CEL was not on and did not see any error messages on the displays.
Should I take it to the dealer for inspection? I am a first time DSG owner after 25 years of manuals and overall I like the DSG but it does have some quirks.
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My wife's RX is really starting to give me a headache. The first problem I'm having with this car is detonation. The car starts pinging at part/ light throttle once the engine is fully warmed up. The is no CEL or codes pending. After scanning the car it seems that fueling is right where it should be and nothing else seems out of order. The pinging stops when you hit the gas harder. So far the only way to rid the car of this problem is to fill with 93 octane and that gets expensive with a daily driver. Shouldn't the knock sensors be handling this? Is there a way to test them?
The second problem I have is the heat won't turn off. Hot air always comes out at what seems to be low fan. I can move the area it comes from ( dash vent, floor etc) but I can't turn it off. With the fan set to off and no settings chosen I still get heat.
The car currently has 78k miles on it
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I recently purchased a 2012 Golf Sportline 2.5 auto. I also currently own a 2006 Jetta and 2008 Rabbit both 2.5 automatics. Both older cars run and drive great with this engine and tranny combination for me. However with the 2012 I really notice a throttle delay when accelerating from a stop and a very early shift into 6th gear when in the gear selector is in drive mode causing engine lugging. Shifts into 6'th at 60 kph doing 1100 RPM.
This I find is very annoying compared to my other two VW's which have better throttle response and shift a little later into 6'th allowing the engine to turn at 1400 RPM allowing for better acceleration without having to kick it down a gear.
I have taken it back to the dealer hoping for a ECM flash update but nothing is available from VW and my vehicle ECM has all other current settings and updates. I ve looked into aftermarket solutions such as the Sprint Booster which allows for a more responsive pedal but based on my other VW's my 2012 should not preform like this.
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03 6.0 with 90k miles. New heads, all orings , stand pipes, injectors , glow plugs, egr delete , oil cooler and studs . Has sct livewire. Just took the truck to the shop for a hard start issue and misfiring at around 30% throttle driving. It would fire up great in the mornings with some white/blue smoke till warm. But after it was warmed up you shut it off it would fire right back up but very slow to reach proper idle.
But if it set for about an hour it would crank great start but same lazy idle up but now it wouldn't get over 300 rpm before it would die. And do this for 5 or so more times before finally idling up. Then runs pretty good other than the misfire. So he said it's either the hpop ipr or icp. I had him replace all 3 with motorcraft parts. Still the same issue ! Return the truck to stock tune and it doesn't have any power . My pockets are only so deep...
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I have a 99 f150 with 171xxx miles and the other day it suck in second gear and start shaking and misfiring and would stall out. I took the truck and got the codes read and it threw codes for the tcc solenoid and shift solenoid. I put both in the transmission and it kepy doing the same thing. I check fuse 24 under the hood and it was blown, I replaced it and everything worked fine for a day then it blew the fuse 2 more times and i cant figure out why it is blowing that fuse. I cant find any shorts maybe pcm??
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I can edit the pictures to point out what's wrong if it's not obvious.
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Where I can get a replacement? Is this something the dealer carries? Or can it be found online? I've run a number of searches on Google and I haven't had much luck.
[URL]....
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1K6945105A - REFELCTOR rear left
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