injection quantities on pd150 leon cupra

[Andrewcupra TDI]

can someone help or advise here

mine on idle is showing

C 1 : -1.76 fluctuating
c2 -0.24 fluctuating
c3 -1.01 fluctuating
c4 +2.99 was the only one not moving around

held at 1000rpm stationary

C 1 : -3.01
c2 +1.48
c3 +2.07
c4 -0.45

held at 2000rpm stationary
C 1 : -2.75
c2 +0.89
c3 +1.76
c4 +0.02

 

[cocadave]

I'm sure i read that these injection readings tell you which cylinder(s) are low on compresion, when i did mine one of my values was greater than the others, I was told this was because that particular cylinder was lower on compression than the others so the ECU was injecting more fuel in order to get a smooth idle, not sure if this test is meant to be carried out whilst revving though... I thought it was just an idle test.

 

[Andrewcupra TDI]

there was another one where you idled car for 1 minute when temp was above 90 degs

wanted to know if the injectors were naff as im led tp believe ive been sold pd130 injectors -- at the time they were listed as 150s

 

[cocadave]

130's and 150's are the same.

 

[Andrewcupra TDI]

thats what i thought but once my car is hot it struggles to start you have to hold key on to force it to start

then whiles car is ticking over at lights its blows out blue ish grey smoke out

car seems to judder at lights like aircon is being turned on then the smoking starts if you rev it stops and returns to tickover fine then few minutes later a judder then smoke


but none at all when driving even hard pushed !

 

[towcester vag]

those figures are out mate
number 1+4 are out of spec really
try running some forte injection cleaner through and recheck
also did you replace injector loom when you did them as this could cause rough running and injection quantity issues

 

[Andrewcupra TDI]

those figures are out mate
number 1+4 are out of spec really
try running some forte injection cleaner through and recheck
also did you replace injector loom when you did them as this could cause rough running and injection quantity issues

i did buy a new loom and gave to the garage , but did not witness them changing it over
and they were a bunch of monkeys so wouldnt dismiss this

just bought some spare injectors and a tandem pump so might swap them out and see

loogs like No4 is just dumping constant fuel in and think that No1 is trying to recover the over balance