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  • Yeah I'll probably end up replacing the O2 sensor again eventually - for now I don't think it's that just because I replaced it last November and the code came back a month later..not going to lie, the symptoms do definitely fit that though.

    Base idle speed seems ok to me, and I've just cleaned the air filter, (test drive coming up on Monday)

    Next thing I want to check are the spark plugs, and ignition coils (my bet is on the ignition system to be honest)
    So I took the cover off the engine thinking I'd know exactly what go expect from various videos etc and I was surprised to see this:

     


    Can someone shed some light on this for me? I was expecting to see 4 'holes' for spark plugs etc but I'm seeing two at best and it just generally looks very different, or maybe not? 

    Didn't want to start messing about without knowing as I don't want to add issues 

    Thanks as always guys, appreciate everyone's time.
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  • So, here is an update, and maybe someone can help shed some light on this. 

    Although the problem used to appear when driving this is how it currently plays out:

    For the last month or so, every single time I start the car, it idles for about 30 seconds, then starts shaking more and more until it finally just stalls or I usually take pity on it and turn it off myself. However, I then restart the car and it's as if nothing ever happened and it runs perfectly. I get incredible mileage (400 - 500 miles per tank on the motorway) so I'm positive the 02 sensor is fine even though that is the only fault that is being flagged.
    It doesn't matter if the engine is cold, warm, halfway there, mornings, evenings, just arrived and driving off again....I always have to start the car twice. Sometimes I drive off at first go, and it's a struggle at higher revs - a restart then sorts it out. I've never knowingly witnessed a misfire but I think that's what it sounds and feels like. But why only at first go? 

    Anyway, so then the engine light went off. Now suddenly the car is happy at the first go. Then the engine came back on..and I have to restart the thing each time. This went back and forth for about a week. 

    Here is something else that I noticed today. My TF lives in a garage that I always reverse into. The fumes have always been quite strong whenever I drive off and I put that down to the exhausts not having anywhere to go so it's simply a strong smell. Today I started the car though, and the engine light didn't come up (nor did I have to restart the car). I let it idle for about a minute, then turned it off, got out, and was expecting to be hit by the nauseating smell of fumes but there was nothing...I did it again and still no smell. I usually hold my breath when closing the garage door it's so bad, but not today, and today the engine light was off. 

    So, I have no idea what any of this means. I have a few things I want to try, starting from easiest to trickiest (for me anyway), so cleaning the air filter, maybe the spark plugs, maybe even the HT leads if it is a misfire? Not sure...but any suggestions would be super appreciated at this point if this rings a bell at all to anybody. 

    Thanks everyone!
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  • Hi David,

    So this got interesting.

    I grabbed a multimeter and checked the following:

    1) I removed both fuses for left and right, turned the lights on via the steering stalk and checked for voltage where the fuses are usually inserted. One of them, I think RH had a roughly 12V reading, the other one was dead.

    2) I put both fuses back in, went under the bonnet to the bulbs, disconnected the wire plug from the bulbs and with the lights switched on, measured the voltage there. Both left and right lights read a 12V measurement. 

    ​This is odd right? Why would one of the fuse ports be dead but power is going to the light at the front? 

    Anyway, I took both bulbs out, and sure enough they were blown and I have an emergency bulb which I plugged in (only one at a time as I only have one spare) and low and behold both lights shine a lovely light. 

    So for now, that's great news and I'm about to head off to Halfords to grab a new set.

    However, it's strange for the following reasons:
    1) why is one of the fuse ports not showing voltage but the light turns on 
    2) why did both bulbs blow at the same time given that they were both replaced as a set only 8 months ago. Decent bulbs too, not cheap.

    It could of course just be an innocent coincidence - that's certainly how I'll treat this for now, but I think there might be an underlying (small) electrical problem at play.

    Either way, new bulbs for now, and I'll wait to see how they get on.

    Edit/Update: Bulbs replaced and now working.
     
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  • MG_OS created a new forum post in MGF/TF Pitstop
    Good morning everyone, 

    So, apologies if this is a repost, I suspect so, but I need some help with my dipped Beam headlights and I have a night time drive ahead tomorrow (hopefully).
    So, randomly they both just won't turn on anymore. I turn the lever (?) to position two and rear lights turn on but not front. Fog lights, main beam and park or side lights still work fine. As it's both I suspect it's not the bulbs although I will test that later today. I read somewhere it could be the fuse, but if I'm correct don't both left and right have individual fuses? 

    I'm really hoping this is a simple fix.. knowing these cars that is a lot to hope for.

    Edit: Silly me, it's a 2002 MGTF 
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  • Thanks for the tips! I will try do that sometime this week. Is it worth getting any air cleaner fluids at all?
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  • MG_OS thanked the user David Aiketgate in the forum post, Unknown Air Filter Type
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  • MG_OS thanked the user David Aiketgate in the forum post, Check Engine Light / O2 Sensor
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  • MG_OS created a new forum post in MGF/TF Pitstop
    Hi everyone,

    So I am trying to get to grips with my 02 TF. Being fairly new to cars in general this means covering the basics first such as air filters. I have some idling issues and before things get too complicated it seems best to clean / replace the air filter, so I opened up my engine bay and found I have a performance air filter installed rather than what came as standard. 

    My question is has anyone seen one of these before and know what to do with it? It reminds me of those cone shaped K&N filters but then why is there a metal housing around it and how on earth am I meant to take it apart? Being new to all of this I'm worried of making things worse..so I'm also a bit hesitant to start unclipping random things without knowing what they do.

    Any suggestions would be a huge help!

    Thanks!

     
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  • Obviously, as soon as I write to ask my questions I also find answers online. So the IACV is called Stepper Motor in this case, right? That would explain why I didn't find it. 

    What is the difference between the plain 'stepper motor' and the 'stepper motor with housing' ? Is it possible to clean these on a TF or is it best to replace them?
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  • Hi everyone,

    Apologies for keeping quiet the last few weeks, I do very much appreciate everyone's input and I think I've been able to narrow down the fault a bit recently. 

    As David mentioned above, I now also think it's less likely to be the O2 sensor. The sensor was replaced back in November and the code was cleared at the time so it is a bit odd that it has returned, however, I think the computer might be misreading a problem and reverting back to the O2 sensor. I scanned the car and it still came up with P0135 and no other faults, using a cheap Bluetooth scanner and Torque Pro, not the best I know but all I have at the moment. 

    So, what I have learned from driving the car around the city as well as on longer motorway stretches is that it runs absolutely fine when it's up and running. The problem exclusively exists when the engine is cold / at start-up that much is clear now. What happens at start up is that the engine starts rev hunting from around 400rpm-800rpm and then just dies down to 0 until it stalls. This all happens within a few seconds of start-up and then if I restart the car everything is fine. Sometimes when I notice it starting to complain I just turn the car off myself now and back on and then it's fine. What I have noticed is that it tends not to do this if I start the car and just let it sit there a bit first, but if I start and basically get going straight away it starts complaining. Especially, if my first move is to reverse out of a car park or similar - it basically always stalls on me if the first action is to reverse. 

    So, this does seem like the IACV could be having difficulty. Here's a probably silly question mind you - I have a TF160 VVC - surely this also has an IACV but I can't find it neither does the workshop manual point one out? Am I missing something? 

    Another thought is that it might be the alternator as the problem also exists more if I start the car with the radio and fan on at the same time, also I read somewhere that being in reverse puts extra load on the alternator but I'm not sure about that. For clarity, this car does not have air-con. 

    Well, my next step would be to have a look at the IACV anyway...if only I could find it?


     
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