Difficult Starting From Cold

[alleng4]

If you have a similar problem to that below here is a possible solution. After my own garage and a specialist diagnostic firm failing to find the fault I simply replaced the spark plugs and that cured the problem.

I have an intermittent fault where my Avensis is difficult to start but does eventually fire and then runs for a short time with a missfire then runs ok and continues to start until the car is left for a long period say overnight and then the problem is back but not always! The local garage can't find a fault - fuel and spark are fine - but cleaning and replacing the plugs seemed to clear the problem. Toyota weren't much help but thought using none Toyota plugs was the probable cause - the car has run fine on cheaper plugs for four years!!! Could it be a sensor playing up or am I looking at the engine magement unit? Any thoughts or advice would be graetly appreciated.

[rf76]

Try checking the butterfly vacuum valve at the end of the inlet manifold to see if the rod ia dislocated. Common fault on the 7A-FE engines which leads to high mpg but not sure if it'll cause poor starting. Worth a look though.