Passat (B5) :: 2001 VW Misfiring After Engine Replacement
May 8, 2012
I have been working on a 2001 VW Passat 2.8 for a while now. I replaced the engine for a customer. Now its misfiring bad.
I did a compression check, everything there is good
Leak down test - everything good
Replaced plugs
Replaced coil pack with known good one
Replaced spark plug wires with good ones
Its missing on 1, 5, 6, some times 4, sometimes 3
I have check all my vacuum lines, no leaks. Sprayed throttle body cleaner every place I can think of, and no change in idle.
I did replace the timing belt, but that is all good. Start's right up. Just shakes bad.
I did check for spark at the plug wires and its getting really good spark.
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i have a 01 passat with a v6 in it on 4 motion and im having an issue with soem mis-firing
i pulled the codes. P0300 P0301 P0302 and P0303 which are all saying that there are missfires in cylander 1,2 and 3 and random miss fires.
im also getting a P0340 which is cam sensor A or the right hand bank. problem is i just replaced the cam sensor and when the motor got warm, the code came back. I was told by the previous owner that the car needed a Coolant Temp Sensor....can this be the cause of my mis-fire issue? hear me out.... it only happens when the car is warm so im thinking that the car is warm but the ecu thinks its cold cause its not getting a good signal from the CTS. thus its either advancing the timing as if the motor is cold and cuasing a miss fire or something along those lines. any thoughts?
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In my 2003 3.5 awd I successfully got my used transmission in and running great. I made the mistake of washing the engine. Now, it runs like Cr@p. It pops and sputters. At one point the CEL came on with 7 codes mostly misfires. It ran ok prior to the bath but I am getting ready to do the timing belt and wp and plug wires. In the meantime, whats the most likely cause of misfires after a hosing down on these engines? I'm leaning towards plug wires or coils...
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My engine doesn't run smoothly (like a misfire) when accelerating at hwy speeds, especially when the outside temp is above 20 degrees... the warmer the temps are, the worse it is.
I have a code P0431 - "warm up cat efficiency below threshold (Bank 2)"
Is it an O2 sensor problem, and if so, which one is it and what is the Hyundai p/n for the sensor? Bank 2 is in the front, correct?
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Recently replaced plugs/wires on soon-to-be 10 year old '04 SF 3.5L (157K mi.) for the first time.
Plugs were OE Champion Platinum and all 6 looked identical except for excessive gap of .010 +/- due to all the miles. Replaced plugs with same as OE. Old plug wires looked good, but replaced them with aftermarket wires ( fit was as good as OE). Also replaced plenum gasket.
Problem is: engine runs rough at idle and high rpm and appears to be mis-firing. CEL is off and code reader shows no Trouble Codes stored.
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Started this winter as a misfire on random cylinders. I replaced all apart plugs and verified the gap. Replaced all the coils. Still occurred during the cold months. Once it warmed up it went away for a short while. The only codes present at the time were random misfire codes. Took it to a shop and they told me the injector was bad on cyl 1. Today I replaced the injectors with a matched set of 4 matched flow Denzo remand. Ran it on the TIS tech tool and was given a barrage of codes. I can unplug #1 coil and it will smooth out and stall within 90 seconds. Engine runs rough. Intake was just done as well. From Toyota TIS
P3191 – engine didnt start
P3000 - Battery Control System
P3101 – engine system malfunction
P3190 – poor engine power
P1300 - ignition circuit malfunction #1
P0303
P0302
P0301
P0300
c1259 - ABS error code meaning problem with regenerative braking. Probably caused by me forcing the car to recharge the HV while misfiring. HV battery was getting dangerously low from sitting for the last 6 months.
b0116 – LH airbag circut
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We have a 2001 passat wagon, V6 and we are told we need to replace right ball joints ...
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I did a valve cover gasket replacement. Changed all spark plugs and coilpacks. The car is still misfiring. I also just did the timing belt and water pump. Why it's still misfiring?? I'm new to this whole forum thing so bear with me lol. I'm wondering if it would be my cat, fuel pump, fuel filter. Or could it be a sensor?
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I have a 2001 b5.5 passat sedan i recently picked up for cheap. The car was on cut springs and blown struts. I just installed JOM blue Line coilovers on it to solve the suspension problem. While i was doing this i realized both the cv boots were torn and needed replacing. I replaced the axles. The passat is a 1.8t with tip tronic trans. After i did the axles when i put the car in drive and let it idle i get a fairly noticeable vibration through out the car. It does not happen while driving or while in neutral. This did not happen before i did the axles. It doesnt make much sense to me?
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Replacing the crank shaft and camshaft oil seals on a 2001 - 2006 2.4L engine?
I'm in the process of installing a timing belt kit w/water pump, pulleys and all seals. My engine has 190,000 Km with no signs of oil in the timing area, but I figure the oil seal would be worn and or cracked/dried so it would make sense to change them, plus it was included in the kit.
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I got 123000 km on my car. Manual says 144000 km is the right mileage to replace the belt, but I have heard opinions that it should be done earlier.
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I have a 2003 Passat 1.8t(B5.5) and I need to change my engine coolant temperature sensor. I have search and found conflicting answers on the forums as far as it location and description. From what I can see it is located near the bottom right hand corner of the radiator(Driver Side). I have removed the sensor and I did see some antifreeze spill out. I examined the sensor and it is blue in color with a rounded top. I called my local auto zone and received a replacement part but it is green and looks a little different.
I understand that the blue one that I removed is no longer produced. My question is is this the right sensor and the right location? All the write ups I can find say that it is located in the back of the engine yet I cannot find one there. Also when I replaced the blue senor with the green one the fan on my car is spinning at high speed(the AC fan) and will not idle. I am wondering if the new sensor is faulty/ incorrect or if i simply replaced the wrong sensor.
Here is a link to the replacement part I used : [URL] .....
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My temperature has been randomly dropping, them back to middle, and recently my engine was overheating because I'm guessing the fans didn't turn on, because I'm also guessing, the engine didn't know it was overheating?
Anywho, during my replacement, I made sure to get rid of the pressure, and the car was cold. I tightened the cap again, but when I took the sensor out, all the coolant spewed out.
Now if I understand this correctly, do I have a leak? I figured the leak I had was coming from the temp sensor as it is.
Here's some pictures for those who'd like to see ....
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I recently replaced timing belt and balance belt on my 2004 santa fe 2.4l and now the engine runs like crap and shakes badly. I went over all timing marks again and again and I am at a loss.
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Going up a hill this LS started shuddering and misfiring and set the po302 code. A small push on the accelerator sometimes seems to temporarily remedy the issue. This started about a week ago. fuel mileage : 26 mpg highway
Here's the readings I got at idle:
Fuel pressure is KOEO - 0 (That's what it read.); KOER - 30.
MAF - about 70
LT FUEL TRIM 1 - 5.5
ST FUEL TRIM 1 - STAYS NEGATIVE
LT FUEL TRIM 2 - STAYS NEGATIVE
ST FUEL TRIM 2 - STAYS NEGATIVE
ST FUEL TRIM 11 - STAYS NEGATIVE
ST FUEL TRIM 21 - STAYS NEGATIVE
O2 1 - NORMAL FLUCTUATES PROPERLY
O2 S12 - STAYS ABOVE .500
O2 S21 - NORMAL FLUCTUATES PROPERLY
O2 S22 - STAYS ABOVE .500
Not familiar with this vehicle...
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In the last year and a half I have developed a problem with my truck missing under a very specific condition. It only happens when the humidity is 100%, either right before, during, or after rain. When it's at 100% humidity outside, the first time I start the car for the day it starts missing. This continues until the truck comes up to full temperature, usually a about three or four miles, then it clears up. By the way, snow doesn't cause this unless its mixed with rain.
My mechanics are at a loss, say there is no info on the diagnostics. Since this started, I have had an inclusive tune up, they replace all plugs and wires, I've had all belts and the pulley replaced, and I've changed the intake air filter twice.
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It all started after I refueled at Mobil after a rainstorm a month ago. Could be coincidence, but right after that the car started jerking wildly and making a howling wind noise from the front. Thought it was the transmission. Brought to Lexus dealership, they told me nothing was wrong as I had low mileage on the car. There are NO Check Engine lights on the dashboard. Car "quieted down" after that, but the noise remains EXCEPT at high speed when it's quiet.
In addition to that, the jerking / misfiring continues at stops, reversing, and slower speeds on occasion only.
I tried Techron FI cleaner, but it has not made a difference. Filled up several times since then.
What's wrong?
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My dad has 2006 passat 2.0T. In December 2010 he went overseas. During his absence the car was parked in garage and not in use.
So one day I decided to start the car and as soon as I turned it on the car made this noise and check engine light came on. Took the car to a private repair shop and found out the cylinder #3 was misfiring. The tune up for this car was due so I had all four spark plugs changed and the car ran fine for few days. Then couple of days later it started making the same sound and this time around the coil for cylinder #3 was replaced.
A few days after that check engine light came back and this time it was blinking and the engine was struggling to run, took it again to the workshop yesterday and this time another coil not sure which cylinder was replaced. (all this is done at a private workshop). I have a hunch that the car is going to run fine for a day or so and the problem is going to come back
I never had any major issues with it up until now. Bought this car new in 2006 from dealer. I am afraid that this might be a start of a downhill roll from here on I will drive the car tomorrow and see how it reacts.
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A friend of mine has an intermittent misfiring problem with his 2003 Passat 1.8T (manual). It occurs mainly at start-up when the engine is cold, and also sometimes at idle. After some research, we've found out that coil packs were a recurrent problem on some B5's, so my friend wants to take a chance and replace the coils.
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I drove home Saturday morning from work with no issues. Car sat until Monday night and as soon as I had to stop at a light it was idling very rough where the rpms were jumping 3-400 up and down. I make it to work and on the way home I experienced the same idling issue along with some misfiring. I scanned and came up with the following codes. I have no CEL. I had my APR flash, Forge Intake, Turbo back exhaust all installed 2 and a half years ago. I have owned the car for four years never having replaced the DV or PCV. 87,000 miles.
10 Faults Found:
001090 - EVAP Emission Control Sys
P0442 - 001 - Small Leak - Intermittent
012403 - Fuel Pump Circuit
P3073 - 004 - Electrical Malfunction - Intermittent
004759 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
P1297 - 001 -
004243 - Bank 1; Fuel Measuring System 2
P1093 - 008 - Malfunction - Intermittent
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 002 - - Intermittent
000769 - Cylinder 1
P0301 - 002 - Misfire Detected - Intermittent
000772 - Cylinder 4
P0304 - 002 - Misfire Detected - Intermittent
000770 - Cylinder 2
P0302 - 002 - Misfire Detected - Intermittent
008825 - Leak in Air Intake System
P2279 - 002 -
000771 - Cylinder 3
P0303 - 002 - Misfire Detected - Intermittent
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I've done just about everything me or my mechanic cannot figure out why cylinder #3 is misfiring has new plugs coilpacks checked wires etc. I love this car and will not put it to sleep!!
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