The Student Room Group

peugeot 106 (1997) problems

hey peeps, i have a pug 106 and its having a few probs, its a 1.6i (xs) and has only very latley acted weird. when driving all of a sudden the revs will shoot up (even when not in gear sometimes) to around 4000rpm (or 40,000rpm - not sure wich lol) so we turn the car off and on and it still does it, then all of a sudden it will stop and then it will start again when driving. the engine isnt overheating as the gage is in the middle and the oil light isnt on either. also, we have checked under the bonnet when its happening and the accelerator cable isnt moving at all, its in its "normall place" when the revs are really high as if it were just ticking over?

would really appreciate the help

thanks very much

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Reply 1

Two things most likely

1) Stuck throttle
2) A problem with the throttle position sensor, you will need to check the resistance of this as you move the throttle in and out.

Either way the ECU dosn't appear to be getting much of a signal with regard to your throttle position. Btw read my sesnor threads its covering this exact issue in some detail :smile:.

Reply 2

AT82
Two things most likely

1) Stuck throttle
2) A problem with the throttle position sensor, you will need to check the resistance of this as you move the throttle in and out.

Either way the ECU dosn't appear to be getting much of a signal with regard to your throttle position. Btw read my sesnor threads its covering this exact issue in some detail :smile:.


wow thanks for the quick reply! i dont think that it can be the throttle being stuck because we checked when it was doing it and the throttle was in the "correct place" as if it were not stuck if that makes sence? please tell me it does lol!

can i have the link to the post you refer to

Reply 3

Yep the TPS basicaly sends a resistance to the ECU depending on the throttle position, if there is a fault with that the ECU won't know where the throttle is properly.

I have no idea on the 106 but I know on Fiestas the problem is often the electrical cable itself that goes into the TPS.

Having a look at this, a picture from my engine.



The black thing at the back of the throttle with a cable going into it? That is the TPS. You need to measure the resistance of that.

It is actually very easy to do for a none machanic but you do need to be electricaly savy.

Reply 4

well, i think im electrical savvy (i hope?!) lol

ive attactched a picture to confirm the location?

what should i do now?
also, is it common then, if the ecu doesnt no the position of the throttle for it to occur at random times? becuase wouldnt it happen all the time?

Reply 5

That pic is of my engine, its probably a problem with TSR. Could you please resend the image.

The electrical connector is damaged to it then it could well cause this problem to be at random. Does it only rev when you're slowing down and released the throttle?

If its reving too much when you're driving randomly then its probably not the TPS.

Although my last Fiesta revved at random on idle when the connector to the TPS broke.

Reply 6

in the Rover i used to have if you disconnected the air flow meter it would keep reving up like that on its own. check your connectors are all tight.

Reply 7

Interesting DAC because I have just done a OBD II test and its giving H02511 which is too too rich mixutre. 2 indicates its a fuel/air mixture problem which could the MAF.

Mine is not over revving randomly though its very constant.

Reply 8

i think it might be to do with the air thingy, becuase where the air filter is there was a bluck rubber tube that kept disconnecting, so i connected it back up but it did it for a while after

would low water, oil or something cause it possibly,

also it does happen randomly when driving :s

Reply 9

Low oil or water won't cause that, but if you drive it like that it will certainly require you to have new engine.

Lack of water = overheating and HG failure
lack of oil = engine siezure.

Make sure both are properly topped up.

Sounds like the wiring loom into the MAF may be the problem. What is petrol consumption like?

Reply 10

pretty normall for a 1.6 i think (although it has done 146,000 miles)
also as far as petrol consumption it seems a lot as my previous car was a 1.1!

Reply 11

AT82
Low oil or water won't cause that, but if you drive it like that it will certainly require you to have new engine.

Lack of water = overheating and HG failure
lack of oil = engine siezure.

Make sure both are properly topped up.

Sounds like the wiring loom into the MAF may be the problem. What is petrol consumption like?


but not too much as this will cause too much hydraulic pressure (caused by excess oil) in the crankcase and the result is not pretty.

Reply 12

Graham my dad managed to over fill the sump on his Escort, the result was lots of almost steam pouring out the exhaust! I thought the HG had gone until the garage said there was too much oil in the engine, oops!

I don't think any damage was caused though in this case.

Reply 13

lol!

You were lucky, i have never done it but when i was doing hovercrafting i left a minion change the oil because i thought that was pretty simple. Stupidly i didn't check the level before i started the engine, a minute later, BANG! Piston flies out the top of the cylinder and a huge hole in the crankcase.

Ask the minion how much oil he had put in and he said he filled it up to the top of the dip stick, i was like ok, well that is correct. Until i asked him again and found out he meant the literal sense, filled it up to the top of the dip stick!

Mind you these were powerful lawnmower engine on this particular hovercraft so not surprising really!

Reply 14

Need to warn my mate about this, he is putting 1 litre of oil in his car every 100 miles and sooner or later he is going to over fill it.

Reply 15

once id changed the sump and then had a break, dinner coffee etc and completely forgotted i didnt fill it back up with oil, then started the thing up and drove down the driveway. well, it started clicking as if the timing was out, and then off it went. never to be started again lol

Reply 16

Dac_10
once id changed the sump and then had a break, dinner coffee etc and completely forgotted i didnt fill it back up with oil, then started the thing up and drove down the driveway. well, it started clicking as if the timing was out, and then off it went. never to be started again lol

my car ticks a little bit, is that coz of the mileage? is it bad?

Reply 17

I've not done this yet. When I'm servicing tractors, I leave the oil can in the footwell once I start emtying the oil. I only move it to fill it back up. I've not forgotten yet, but I would hope it would remind me.

Reply 18

Minardi
I've not done this yet. When I'm servicing tractors, I leave the oil can in the footwell once I start emtying the oil. I only move it to fill it back up. I've not forgotten yet, but I would hope it would remind me.


When i ever change the oil and leave it, i stick a whacking great big red flag in the dip stick tunnel thing. Leave the bonnet up and you can't miss it!

Reply 19

Exactly. You need something to remind you. The bonnet is usually off too, which is a good clue.