The 75 and ZT Owners Club Forums - View Single Post - Advice on whether my injectors have had it

Alan_M · 14th December 2019, 16:30

I’ve only had this car a very short time and the list of jobs done and needing to do seems to be getting longer every time I look at it.

Today’s problem to sort.

The idle is quite lumpy, it can be a little smoky at idle and when revved - black/blue, low on power and seems to have a little miss.

I’ve downloaded a diagnostic program and looked at the injector values and I believe 3 of them are outside normal values. One of them doesn’t even fluctuate.

The values at idle are (mm^3)
Cyl 1 +10.00 and no fluctuation
Cyl 2 -0.43
Cyl 3 -3.04
Cyl 4 -9.99

RPM values
Cyl 1 748
Cyl 2 804
Cyl 3 770
Cyl 4 792

At 2000 rpm
Cyl 1 +10.00
Cyl 2 -1.57
Cyl 3 -3.23
Cyl 4 -7.08

RPM
CYL 1 2008
CYL 2 2032
CYL 3 2018
CYL 4 2024

These are all with the MAF disconnected as this is also duff.

So am I looking at needing to replace number 1 and 4 and possibly number 3 as well?

Is it worth running some neat injector cleaner through them?

14th December 2019, 16:30	#1
Alan_M Regular poster Rover 75 Tourer + saloon Join Date: Apr 2019 Location: Newport Posts: 99 Thanks: 16 Thanked 27 Times in 21 Posts	Advice on whether my injectors have had it I’ve only had this car a very short time and the list of jobs done and needing to do seems to be getting longer every time I look at it. Today’s problem to sort. The idle is quite lumpy, it can be a little smoky at idle and when revved - black/blue, low on power and seems to have a little miss. I’ve downloaded a diagnostic program and looked at the injector values and I believe 3 of them are outside normal values. One of them doesn’t even fluctuate. The values at idle are (mm^3) Cyl 1 +10.00 and no fluctuation Cyl 2 -0.43 Cyl 3 -3.04 Cyl 4 -9.99 RPM values Cyl 1 748 Cyl 2 804 Cyl 3 770 Cyl 4 792 At 2000 rpm Cyl 1 +10.00 Cyl 2 -1.57 Cyl 3 -3.23 Cyl 4 -7.08 RPM CYL 1 2008 CYL 2 2032 CYL 3 2018 CYL 4 2024 These are all with the MAF disconnected as this is also duff. So am I looking at needing to replace number 1 and 4 and possibly number 3 as well? Is it worth running some neat injector cleaner through them?