Senna is right..

If your car was tuned on a extreme hot day, and your tuner uses open loop boost control, you will find coming upto winter, your boost is now higher in the cold, and since timing was on edge before, its most likely got more timing than that boost level can handle.

A melted cat is also another posibility.

or even possibly Fuel filter and or failing fuel pump, what type of pump got installed ?

pete

Headsex is on the money I'd say!

or a melted cat.

or even possibly Fuel filter and or failing fuel pump, what type of pump got installed ?

pete

walbro pump was installed and when I did contact him he said that about the timing.headsex dont think I have had the pleasure of meeting you im peter