I'm having probs with the acceleration on my TD100. It takes ages to get to 60 and that's in 3rd gear. To get to 80 I need to stay in 4th and I can only get to 90 at a push and going down hill!!!!!

The car has had the Oil sump replace lately due to a bit breaking off!!!! but the car was slow before this.

I have also replaced the front-end exhaust, ran Redex through the engine, tried disconnecting the Airflow Sensor all with no joy.

It's really starting to p*ss me off.

The cam belt was changed at 68000 miles

The car is a 97 P reg with 78300 miles.

Any suggestions/solutions!

Cheers

There is clearly something wrong as acceleration in these is pretty lively when the turbo kicks in. Take it back to the place that did the recent work is my advice.

If you've disconnected the Air Flow meter sensor with no difference then that's your problem. If reconnected the engine should be a lot livelier. As it is not you need a replacement.

The car's been this way since I got it about a month and a half ago. I test drove it on purchase but thought nothing of the lack of acceleration as I never put my foot down during the test drive. I know this was stupid but I'm sure this must be fixable!

Something I did notice the other day but forgot to mention is that in 3rd,4th and 5th the accelerator only seems to be effective for the first half of pressing. After that i can lift off and on with no change in speed or revs

loss of power

hi mate took my 1.6 to fiat with same fault diagnosis was the knock sensor replaced it easy to do dissconect it with ignition off and nudo bolt and reconnect job done

Re: loss of power

Where is the knock sensor and how much to replace, either by fiat or DIY?

Re: loss of power

Didn't think there was a knock sensor on a diesel......

YAH

hello..i love bravi i thing,no i`sure is the beste ever bild..ypur problem resumuses to your filçter clearnear..put an corbon air filter..my td100sx...give 235km.. i hve pictures..its the best...don`nt give a dam from the tdi`s bravom rules...only air cleaner.....

Re: loss of power

Can you feel any turbo kick at all (from about 2000rpm upwards)?
Suspect a turbo problem if you are sure the air flow sensor is OK.

Sounds like a job for a garage

Re: loss of power

I've disconnected the Air flow sensor and tried running the car without it but it makes no difference.

I replaced the exhaust due to a hole, but while I had the hole I could hear the turbo whistle so I think the turbo is working!

Re: loss of power

If it whistles then part of it is working! Doesn't mean that both ends are still connected together. There is also a wastegate to stop overboosting. If this is stuck open then the turbo can whistle as much as it likes but there isn't going to be much boost. There also might be pipes off.

You might also have a fuel supply problem. A bit unlikley but a fuel filter change might be in order.

If the turbo is OK you should feel a very strong push under acceleration from about 2000rpm to about 3500. Granted yours is struggling above 3000, but can you feel anything from 2000 upwards at all? It should be a real surge.

The air mass sensor will have an impact at higher rpm as well. Not sure about this car, but on others you can measure the output of the air sensor at different rpm to see if the signal is changing in an appropriate manner. Its not foolproof but would give an idea that the sensor is doing something. You'll have to use a voltmeter and connect to the appropriate wires by poking pins through the insulation, but someone else will have to tell you which wires. The output should rise with rpm. If it doesn't then suspect the air sensor.

Re: loss of power

look, you ran it without the air sensor or with it disconnected and you say there is no difference, so it is this which is faulty. get a new one.

Re: loss of power

its gonna b the air flow meter it allways is when the power dies off at around 3000rpm

Im Driven to Earn, and I Earn to Drive......

Re: loss of power

But I thought if you disconnected the air flow sensor the engine ignored it and it ran faster. And that the only reason to reconnect the sensor was to make sure that there wasn't too much air getting into the system?

Re: loss of power

Just because you have disconnected the air sensor and it makes no difference, doesn't mean its the air sensor. The air sensor could be doing its thing but other problems can cause lack of power.

Granted the finger of suspicion does point to the air sensor, but its not guaranteed. They do cost money so it is cheaper to measure its output as a first approach as described above. If money is no object then just replace it and be done with it.

Re: loss of power

not being funny and owning a TD100, the TD's dont have an air flow sensor like the JTD's do, well I aint found one yet,

sounds like the engine aint getting boost from turbo, mine did similar thing, but that was a hole in the turbo pipe, before it was dead, now it goes like **** off a shovel

Re: loss of power

If it's the same as Tempra turbo diesel, there's a small rubber pipe about 8mm ID that runs to the injection pump( dunno what it does). This splits & you notice lack of turbo boost. When it falls off you get NO turbo boost. Cure is to cut an inch off & refit, permanent cure is to renew the whole pipe. Mine split once at the other end, connected to a solenoid type thinggy - dunno what that does either.
Gotta be worht a look since the permanent cure is 80p !!
Cheers
John L

Hello,

am assuming you have checked the air filter. you should be able to hear the turbo whine at around 2000 rpm, this indicates it is working somewhat, but you could check the wastegate to see that it is not jammed. There is an airflow sensor, but on the TD100 its under the battery, and to get at it clearly you need to remove the battery tray. Also, check the hoses to and from the intercooler, e.g. from the turbo to the intercooler, and back to intake. There are several places where hoses could rub, and punch holes in them (near the battery being one spot). after that, you could try and get a diagnostic done and see if there are any memory faults..

Owen.

just to me and from wot both my TD100 and my dads astra TD did, sounds like a hose has split somewhere and the engine aint getting the boost coz its leaking, mine split on the pipe to the intercooler, replaced it with some new hose and its right as rain again!