Toyota Yaris 1.4 Diesel 2007

[NISAR1]

Hi, I am have an acceleration issue with my 1.4 diesel yaris. When setting of in 1stvit is fine by when I change it to 2nd gear it I'd hard to speed up with full foot down on pedal. I have taken it in for diagnostic but nothing on the computer has come up. I have used redex with no success. Any ideas folks? Thanks

[johnny.5]

maybe the mass airflow sensor needs cleaning or replacing try cleaning it first

[johnny.5]

[NISAR1]

Forgot to mention the mass airflow sensor looks fine and I have given it a clean with tissue paper. I think I should have used a spray for electrical parts. Thanks

[NISAR1]

Is a mass air flow sensor cleaning spray same as an electrical circuit cleaning spray?

[bhg481]

I would try it with an air-duster - nothing to lose.

I'm surprised the computer-diagnostics didn't identify the problem (was it a Toyota dealer?). Several years ago my Volvo suffered from an airflow sensor problem (I feared it was the turbo) - the Volvo dealer diagnosed it, replaced it and the car was back to normal - I can't replace it costing a fortune but, then, I was expecting a new turbo.

[NISAR1]

I have cleaned the mass air flow sensor with the spray cleaner but with no success. It cost me £4 so not much lost.The diagnostics was run by an experienced garage owner but not a Toyota dealer. I did take it on the motorway for a blast and did notice blue smoke when I had it in 2nd gear on the slip road. I think my next step is to add those Wynn's product that clean the turbo and egr valve. :-(

[bhg481]

I think you'll be spending good money after bad if you do. Get it to a Toyota dealer - they're familiar with all the quirks.

[NISAR1]

I always find that the dealers are very expensive. I may have to go there in the end. Thanks bjg481.

[tonyav]

Get it to a Toyota dealer - they're familiar with all the quirks.

Yep, way to go.

Diagnostics will show nothing unless the engine management light has been on so it can store the fault in the ECU.

[tonyav]

Just a thought, have you checked the the air filter isn't clogged up or that the EGR valve is working properly. Or maybe checked the boost pipes for leaks ( turbo ).

[NISAR1]

The air filter is fine. I tried taking the egr valve but there is one bolt which is really hard to get to. My usual mechanic said he will have a closer look at it next weekend. I shall keep u all updated. Thanks

[derek-33]

sounds like the turbo is not working to me

[NISAR1]

Just to let you people know the car is back to normal. It cost me £12 to purchase Forte turbo diesel turbo cleaner and I then put it into the fuel tank add added a full tank of diesel. After finishing the fuel and getting over 300 miles from it there is no limp mode. It looks like the vanes on the turbo were clogged. I will have to do this once a year for maintenance and I have saved myself a lot of money. Thanks again for all your suggestions.