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Dexterdog

Member Since: 23 Jun 2018
Location: gloucestershire
Posts: 108

Injector Tolerances

Hi,

Still chasing a hesitation / misfire on my 2001 TD5.

Live data showed the injector balance tolerance to be varying. One or two of them was as far out as -19 on occasions. A couple never went far off the graph pattern and stayed around -4

Tried googling but cannot find info. Is -19 indicative of a dying injector ?

Thanks

8th Aug 2020 9:07am

TD5Neil

Member Since: 02 Nov 2017
Location: Cambridgeshire
Posts: 42

Mine were all close, +/- 1-4. I don’t know how far out is out of tolerance though.

8th Aug 2020 4:11pm

BaronDefenders

Member Since: 28 Jun 2019
Location: London/Cotswolds
Posts: 805

I think +/- 1-5 is good and anything up to 7 is acceptable. 19 is totally off. Charlie

1949 Series 1 80 (SOLD)
2002 Td5 90 (SOLD)
2008 Freelander 2 (SOLD)

1958 Series 2 88 Pastel Green (2019 LR Legends Best Restored)
1983 V8 110 Limestone (Previously owned by Tom Sheppard MBE)
2004 Td5 90 Santorini Black (Td5INSIDE Powered & Rebuilt by CSK)
2012 Puma 110 Zermatt Silver (Overlanding Build)

Instagram: @BaronDefenders

8th Aug 2020 9:31pm

rallysteve

Member Since: 10 Feb 2014
Location: Cumbria
Posts: 2197

2002 Defender 110 Td5 DCPU Keswick Green

Was the -19 at idle or under load?

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8th Aug 2020 9:47pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

I had 2 injectors way out of trim. It was the early warning sign of head gasket failure. Since replacing head gasket (and a new head) all the injectors are within a few points. Nothing definite but worth considering

2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
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8th Aug 2020 9:57pm

Dexterdog

Member Since: 23 Jun 2018
Location: gloucestershire
Posts: 108

Thanks for the responses.

It was semi under load. The car only hesitates / misses just before the turbo spools up. Once you have it revving, it goes very well and you can actually drive it hard and drive straight through the problem. The reading was just as it was stuttering as I was holding it at the right point on the accelerator just before the turbo spools up properley.

Interestingly I cannot get it to miss a beat when its stood still. When stationery I can search for the point in the revs for it to miss and it doesnt happen but when going along i can find the point just before the turbo spools up and hold it there. In low ratio it will kangaroo. When driving along at 50mph, it hesitates and stutters but momentum dulls down the effect compared to low ratio slow speeds.

8th Aug 2020 11:21pm

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