I have a 1990 series 2 rs turbo....recently been tuned, and setup, by local rolling road specialist, also had new injectors.

Basically took car out today..and when driving, and dropping down gears, when revs are relatively still high..ie 3rd gear to 2nd....there is popping/back fire from exhauset..this can be multiple back fires/pops..dependant on revs..

any ideas what is causing this?

 

Are the new injectors the same or bigger?

 

hi....should be the same..i bought them new from Ford.....

 

Sounds like unburnt fuel in exhaust,must be overfueling. were did you get it tuned???

 

Hi-Tec Motorsport in Cradley Heath....

he is normally alright the guy down there, i took a couple of rs's there in past....i suppose it has to go back to him....

 

oh..also whilst car waqs at Hi-Tec....

he told me compression is higher than he is used to...compression was 175 all the way across....not sure wat this means....????

but car engine has had full engine rebuild using mahle pistons..and barely done more than 100 miles since rebuild.

 

Yes ide take it back to him and get him to re do it as if its overfuelin your fuel bill will be silly,especialy with the price of fuel these days,every little helps

 

Have you checked your exhaust joints? that makes them pop and fart if they aren't sealed right, it lets air in causing the pop and bang, just before you take it back to him, it may be worth checking.

Debs

 

thanks i havent checked exhaust joints, but it only started popping after i took it to Hi Tec..it was alrite before....!....but i will check before i take it..