So I recently changed my MAP sensor when the old one was going bad, or so I thought. The new one (aftermarket from ebay) is behaving the same way.

The car throws out white and black smoke when the sensor is on, without it's normal. The spark plugs were pitch black, changed these. O2 sensor is new. Consumes 19l/100km when sensor is on, so it hasn't been on for a while now. Went normal after 30 minutes of sensor change, next day issues came back. Hesitates strongly during acceleration and then suddendly accelerates, you can hear it throw fuel into the engine when you accelerate with sensor on. Very hard to accelerate during stops on low gear, could suddendly stop accelerating. Loud exhaust sound when that happens, could be because I have a hole in the muffler. Tested sensor with multimeter, no change in voltage when you accelerate, both old and new sensor behave the same way.

You're probably wondering why I'm not taking it to a mechanic, well firstly it could cost have a lot and I can't afford it yet. Secondly I like the challenge. But it's becoming very tiring now when the issue remains after so many attempts to fix it.

Throttle body is changed as well.

Anyone who had a similiar issue?

Thanks in advance.

Which engine?

It has the 1.2l engine without turbo. 60HK.

Sounds like a vacuum leak.

I use WD40

I thought so as well, I have made many attempts trying to find the leak with soap water, doesn't work. I'm afraid the WD-40 would start a fire and since I don't have a fire extinguisher, should I even attempt to do it?

There's a box with the air filter inside of it and a part of it is connected to the throttle body, that part kinda makes a hissing sound as if air is leaking out. But I've checked the bolts and they're pretty tight, I can't make it tigther, the bolts would break.

If I tried the WD-40 way, would I even hear the difference? Because the car is already reving up and down like a bull. It's like small doses of constant missfires that can be heard through the exhaust.


EDIT: Would CRC 5-56 Universal Spray work by any chance?

Rezgar said:

throttle body, that part kinda makes a hissing sound

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Still sound like its leaking here

Here's an image of the part I'm talking about. The red arrow shows where I hear the sound, the blue arrows indicate the parts I'm having difficult tightening, feels like they're loose even though the screws cannot be tightened further.



Might buy a fire extinguisher and try with CRC 5-56 spray, should work like WD-40 I assume.

Oh yea, I forgot to mention that the OBD II scanner gives P0110 and P0105 as fault codes, removing doesn't help.

Rezgar said:

Here's an image of the part I'm talking about. The red arrow shows where I hear the sound, the blue arrows indicate the parts I'm having difficult tightening, feels like they're loose even though the screws cannot be tightened further.

Might buy a fire extinguisher and try with CRC 5-56 spray, should work like WD-40 I assume.

Oh yea, I forgot to mention that the OBD II scanner gives P0110 and P0105 as fault codes, removing doesn't help.

Click to expand...

Those screws only serve to secure the airbox to the engine; their tightness will make absolutely no difference to your issue. Overtightening just risks breaking them and causing you a further problem.

Do you by any chance know where the IAT sensor is located on this car?

It's so hard to do anything without the service or workshop manual and it's not available anywhere, except maybe on Ebay where you could buy one.

Rezgar said:

It's so hard to do anything without the service or workshop manual and it's not available anywhere, except maybe on Ebay where you could buy one.

Click to expand...

You can download eLearn from the downloads section of this forum .

Built into the map sensor

I would fix the leak before chasing ghosts

Yeah, I guess I'll get back when I've tested for leaks. Any specific areas I should spray at and areas I should avoid?

Guess if you can hear it under the air box. The gasket on top of the throttle body and the little pipe next to it. Never had a problem spraying anywhere myself. Even if it did set alight it's in such small quantities. Even petrol on a hot exhaust just evaporates. It's a matter of being sensible. Don't use vast quantities and do it outside so there is no vapor build up.


High performance brake fluid is different as it self combusts when it gets hot. Not there's any in a Panda. LOL

We also need to sort out the air box screws not clamping down. As far as I remember they clamp tight and the air box still move via some rubber mounts. I was going to check but forgot today.

Yes it has a slight movement because of the rubber mounts. However I forgot to mention something. The new sensor that I had installed on the car had black/green stains on it, is that normal? Now the sensor has not been used that much, perhaps a few hours total and cable has not been attached to it since few months back. I remember clearly when I bought the sensor, the tip of it was completely yellow.

I took a few pictures to show you how the spark plugs and map sensor looks. Keep in mind that I've used the MAP sensor a few hours since I changed it a few months ago, since then the cable has been off.

These spark plugs were new when they were changed, that's how they look the day after. The performance is huge when you clean it and reattach it to the car. But since they go black every time I clean them I gave up on doing that.



Do you see the black spots on the yellow? That was completely yellow when I bought it.

Spark plugs will be black with the senor disconected as it can adjust the mixture correctly and will default to a safe rich mixture.


Let gets the obvious faults fixed first as they have a knock on affect.



By the way is the hole in the exhaust after the O2 sensor

Sure. I'm getting back to town later this weekend, will post progress then. Peace out for now.

I have no clue on how to check that. I think the hole is on the muffler, right at the end of the car. Mechanic told me muffler had to be changed.