Santa FE SM (2001-06) :: Misfiring Under Specific Condition
Feb 22, 2014
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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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 car is misfiring, codes p0171 and p0300 come up on the code reader. It idles rough and has very little power. I have checked my exhaust , it is not plugged. When I unplug coil #2 while idling there is no change as to the engine performance so I switched the coils around with no difference when coil is unplugged on cylinder #2. I have changed the plugs, there is power to the coil, all plugs are firing and when removed plugs 2 and 3 are wet with fuel indicating I am getting fuel and fire. I have replaced the cam sensor with no change.
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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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2001 windstar, IMRC works fine (closed) under 3000 rpm. When above 3000 rpm the intake runners open and i get surging/loss of power.
No error codes.
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Brought home tonight a 2001 Ford Escape 3.0L 24 Valve V6. Bought it from a mechanic who's customer didn't want to put any more money into it. Has 185000 miles on it and it throwing the P0303 & P0171 codes. Cylinder 3 miss and Lean condition bank1.
Mechanic thinks it is a valve seat in the cylinder head next to the fire wall. Before I start replacing the cylinder heads with new remanufactured heads I plan on doing a compression test and leak down test.?
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i have a 2008 santa fe with a 2.7 61,000 miles 2nd owner ,out of warranty. It started missing and the check engine light came on. I took it to a local parts store who put an analyzer on it an it showed the #3 spark plug was misfiring. I am hoping its the plug. I do my own work but havn`t been able to find a correct sequence to replace the plugs.
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To start off with I am not car smart! I have a 2008 Santa Fe 3.3L V6. Last year about this time (December) I had problems with the vehicle upon start up would be miss firing and the check engine light would come on. I would turn the vehicle off and restart and it would be fine and not happen again sometimes for a week and sometimes for months. I hooked it up to the computer and found that it was missing on the #6 cylinder. I had the coil pack replaced and that seemed to fix the problem (replaced spring 2011). About a week ago it started doing the same thing (December 1). Upon initial start up when the car is cold and the outside air is very cold it started missing again and having a rough idle. Would turn of the car and restart and would run fine but check engine light would come on.
Hooked it up to the computer once again and it read random misfire. This has happened twice now in two weeks with the same reading each time. Always when it is cold (engine and outside temp) and seems to reset itself when turned off.
I spoke with a mechanic who recently had this same issue with a different vehicle and after trying many things replaced the engine coolant temp sensor and that did the trick. He said it was a cheap start therefore i bought the part and now am looking to replace it. The only problem being i am car dumb and cant find it. I have done many searches and the diagrams i have found don't do me any justice. The past posts on here have given pictures of older models that dont match what i am looking at. It probably is right in front of my face. Any picture of a 2008 that will show the correct area I should be looking at? The vehicle only has about 57,000 miles on it.
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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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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 2001 Ford Mustang, V6, 3.8 Liters, automatic transmission, 120,000 miles. Recently, my car has started to stall/misfire at when I come to a full stop at a red light. It feels like the car is going to shut down and like it has no power. I have to press the gas really hard to get it to pick up power and speed. It doesn't happen every time and I've noticed that it happens less early in the morning or at night, and it happens more often during the day when it is really hot (I live in Az and temperatures are currently in the 100sF).
The "service engine" light is not turning on. The battery was checked and it's fine (recently replaced in September 2011). The alternator was changed 1 month ago. The cooling fan was replaced 1 month ago. I took it the the Ford agency and no codes are turning up and they can't seem to duplicate the problem even though the ran the car for 15 miles. They checked coils, spark plugs, fuel injectors, fuel filter, gas pump pressure, and it all seems fine. They advised that I fill up my gas tank with Premium gas and add fuel injector cleaning fluid. I did and the problem is still there. They then advised to fill up gas tank again with Premium and add Techrnon additive. I did and the problem is still there.
I am scared that my car will stall and turn off while doing a left turn with oncoming traffic or in the freeway.
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I have a 2001 Dodge Durango with the 4.7 liter V8. I recently changed the spark plugs and it ran for a few days misfiring periodically. Then overnight after a good day of running it would not start. The engine will rotate but not fire. I changed the individual coils but only to get the same result. I think that I may have the wrong spark plugs but where to go next.
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Need some input on miss firing on acceleration on a 2001 Ford SuperCrew F-150 Lariat, 5.4 engine. 200,290 miles.
Have replaced all spark plug boots covers (Sept 2012), number 1 plug (Sept 2012), 3 and 7 plugs replaced, 3 and 7 has heli-coil kits (2011) installed for blown out plugs. New in-take manifold (2010). New gas line filter, air and oil filters (Oct 2012) and oil changes every 3000 to 3500 miles. Have poured 12 oz. fuel injector cleaner in gas take two times with 6 to 7 gallons of fuel in gas tank (last 2 weeks).
Have No check engine light on for service engine but have had an diagnostic scanner analyzer plugged into driver side, in cab outlet, 4 different times to see if I have a bad coil on plug or other problems. No codes show up indicating any problems. The engine idles nicely when at stop lights but does have a slight intermittent miss at times when warmed up and stopped at lights. Engine misses when warmed up on acceleration (when it is under a load and on acceleration).
Had a mechanic tell me he could plug an analyzer into engine but couldn't guarantee he would find anything wrong. This sounded like a little snow in July to me and the mechanic didn't sound optimistic.
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My 06 Elantra started to stall / misfire when I was driving it. It doesn't seem to matter how fast I am traveling as it will " misfire" for lack of a better word. It has an automatic transmission, and the rpm's will start to bounce as the car begins to jerk when this occurs.
I don't live anywhere near a dealership, so I brought it to the garage that I take my other vehicles to, and they had a hard time diagnosing the problem due to the fact that there never was an error code coming up or check engine light. They ended up finding a bad coil and changed it out.
That was 2 months ago and I haven't had a problem with it till today when the exact same issues resurfaced. And again no check engine light comes up, just the misfiring and when stopped at intersections, subsequent stalling.
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I've got an issue on my Escape, and I'm at a dead end. '01 XLT V6 150K miles.
About a week ago, driving to work, it started stuttering or misfiring while accelerating up inclines. Cruising and idle were smooth with no issues. I found that if I let off the gas as it was stuttering, it would stop, and then I'd give it gas again, and it would be fine. It was pretty intermittent.
Opened the hood and the large vacuum hose that goes from the top of the intake down to the PCV, has an L boot that connects it to the intake. That boot was collapsed down on itself while the motor was running. It went back to normal when I shut it down. I felt the boot and it was very thin and worn out, so I replace the whole two piece hose, along with the PCV valve. The old PCV came out and was rattling, so I believe it was ok, but I installed a new one anyway.
Drove it after that and it still had the stutter. It was now also doing it just barely at idle. I'd hear the motor miss, and it would really start when I would give it gas. I thought it was still a vacuum issue, and that there were probably other bad hoses. I found two. There's a small hard plastic line that comes off the air intake hose from a T, and those lines go to the camshaft covers. The hard lines go to rubber boots on the cover, and the one in the back was in two pieces. Replaced it. No change.
The other line is a small rubber line that comes off a round component, (I still haven't found out exactly what this part is called), that is bolted to the drivers side shock mount, and has a couple soft lines coming off of it. One of the lines goes over the top of the motor and ties into a T right where that large PCV hose goes into the intake. The part is circled in red, and the arrows point to the hose in the attached pic.
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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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I have a 2001 Jeep Liberty Sport 4x4. 150,000 miles. I had the ignition coil changed on cylinder #5 last weekend and then this weekend it started spewing black smoke out the tailpipe. Dealer says cylinder #2 is misfiring and he would have to replace the cylinder head. The main issue is that the part is backordered for an indefinite amount of time so I have no way to know if or when it could be fixed. If it could be fixed there wold be no guarantee it would work for much longer. It is obviously cheaper to repair the car than get a new one, but at some point the is the law of diminishing returns...
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I'm so frustrated after running several errands in the rain yesterday, and being unable to unlock the Touareg (V6) using the remote key fob unless I'm right next to the car and in a certain spot. It's been an ongoing problem since we got our car in November, but I'm at the end of my rope. It's also embarrasing to be standing in a parking lot circling the car trying to get it unlocked with the remote key fob. This is affecting both the doors and the rear hatch. What solutions are available?
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2001 MK4 GTI VR6 put brand new coil pack, wires and plugs in the car because it was misfiring. Was fine for about a week than I got a clogged cat code and could feel the affects. I now have no cat, no resonator, and no muffler. The car is finally driving good and then the check engine light came back. It says only a misfire in Cylinder #3 and when accelerate hard to speed up my check engine light starts to blink until I stop accelerating hard. So my guess is the clogged cat caused that cylinder to misfire but I do not know the actual solution to this. My EVAP hose is semi-pinched and when u squeeze it you can almost kill the engine. The weirdest thing of all is this: driving normal I shift in between 2000 and 3000 RPM and once i get into 4th gear about 2000 RPM......my car starts shaking badly and i feel like my engine is going to fall out. I have searched and the only thing i can think of is a bad injector...
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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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