Old Corolla

Thank you, that's given me a few things to work on. I hadn't thought about the cambelt but it was changed at 188000 miles 4 years ago so according to the service schedule it should be OK for another 30000 miles, but I'll get it checked anyway. I've fiddled with the idle adjustment and it only starts to run smoothly at around 1200 revs. Thanks again Ian.

My '94 SRD suddenly started using more fuel a couple of months ago, the MPG dropped from the usual 40/42 to 30. I've checked everything I can think of, there are no leaks that I can see and I've changed the fuel, oil and air filters and of course the oil. I also added a bottle of injector cleaner at the last fill up which I do every now and then anyway. Now it has started idling very roughly once the engine is warm and I mean rough, the whole car shakes. I put it in early for the MOT last week and it passed with just an advisory for a small leak from the exhaust. I thought it would fail as it was attempting to shake itself to bits. It passed the emissions test with flying colours and the MOT inspector said he couldn't fail it for being "a bit rough". He said it might be sucking in air through a small crack in the fuel lines so I sprayed loads of WD40 around them to see if the revs picked up but nothing happened. Any ideas as to what I could check next would be appreciated, thanks.

Hi and thanks for the advice. I've checked all the basics, new fuel, oil and and air filters and oil change and I added a bottle of injector cleaner at the last fill up, which I do every now and then anyway. Still getting poor mpg and now it is idling rough as well. It starts OK and is nice and smooth until the wax idler closes when the engine is hot and then it starts idling rough. A friend suggested there might be a cracked fuel pipe sucking in air so I sprayed WD40 around the fuel pipes to see if the revs picked up but they didn't. I'm now thinking it could be something more serious (and more expensive!) so if anyone has any more ideas or suggestions they would be much appreciated. Thanks!

Hi, I have a 1995 Corolla SRD with the 2c diesel engine. I've owned it since new and it has always done 40 to 42 MPG but I noticed the fuel gauge seemed to be dropping a bit quicker than normal recently and I've worked out that it is now doing only 32 MPG. Any ideas as to the cause? I've been underneath, there are no leaks and it drives the same as it always has, no loss of power or anything. Any help would be appreciated, thanks.