MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: ald1717 on February 12, 2022, 04:32:54 pm

Title: loss of mpg and performance
Post by: ald1717 on February 12, 2022, 04:32:54 pm

car has been down on power and around 5-6 mpg worse lately, thought it was bad fuel but after using different station made no difference, 2 months ago i replaced injectors as 2 were misfiring getting fuel cuts, car was running like a dream until last week, no eml, i did add the rs4 return valve as i was planning to go loba, im wondering if somehow the extra rail pressure is messing with things, but i dont see how thats possible when it ran fine for over a month?
any ideas, chave checked dv, done the dipstick test with pcv checked hoses,
even when its off boost its lost mpg and performance, so im rulling out boost leak,

Title: Re: loss of mpg and performance
Post by: ald1717 on February 13, 2022, 09:37:41 pm

UPDATE,    seems to be coil pack related as i bought the lemark ones at £20 each they lasted about 15000 miles or 18 months so probably cant complain,