Injectors misbehaving but trying to understand the numbers
Moderator: RichardW
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Injectors misbehaving but trying to understand the numbers
Hi Lads I ran a diagnostic on the car because she smells fuelly, yes it's the C5 that has all the problems but I bought it thinking it had an injector problem. Can anyone tell me what the us stands for. To me none of the injectors look right numbers wise but I am hopeful if being corrected. No fault codes apart from the glow plug fault but we know that is a ghost code
Darren
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Re: Injectors misbehaving but trying to understand the numbers
I ran it on Delphi and diagbox, Injector 3 stays at 143.14 Ms in diagbox and the others jump around quite a bit so it's trying to correct for injector 3 so I have to try and pull it out. I have a spare but 3 is welded in.has anyone any tips on pulling these when they are badly stuck.I think it's just stuck open.i have a big slide hammer but it wouldn't budge. Does anyone have a known good list of values for a 138bhp Delphi injector C5 at idle
Last edited by darbuck on 14 Mar 2023, 20:19, edited 1 time in total.
Darren
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Re: Injectors misbehaving but trying to understand the numbers
I'm not sure on the numbers here either, if you select one of those 4 lines, is there some more information at the bottom? Think is normally a description of each line when you click on it.
Regardless of the units seems odd 3 are negative and 1 positive, so Injector 3 is behaving/ determined as different by the ECU
Regardless of the units seems odd 3 are negative and 1 positive, so Injector 3 is behaving/ determined as different by the ECU
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Re: Injectors misbehaving but trying to understand the numbers
Engine nice and hot (assuming it'll run well enough to get it good and hot)darbuck wrote: ↑14 Mar 2023, 20:16 I ran it on Delphi and diagbox, Injector 3 stays at 143.14 Ms in diagbox and the others jump around quite a bit so it's trying to correct for injector 3 so I have to try and pull it out. I have a spare but 3 is welded in.has anyone any tips on pulling these when they are badly stuck.I think it's just stuck open.i have a big slide hammer but it wouldn't budge.
Have read cellulose thinners melts the black gunk well too, cant confirm that as not tried it personally as yet
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Re: Injectors misbehaving but trying to understand the numbers
Yeah I redone a diagnostic it's definitely 3 it's stuck open now.
I'll warm it up as you suggest cellulose thinners on a hot engine wouldn't be a good idea could explain HDI engine fires. I will have to pull the bonnet off to get a good swing at the slide hammer.
I'll warm it up as you suggest cellulose thinners on a hot engine wouldn't be a good idea could explain HDI engine fires. I will have to pull the bonnet off to get a good swing at the slide hammer.
Darren
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Re: Injectors misbehaving but trying to understand the numbers
Yes, a very good point, I'll rephrase it - get it warm and see if that works, if not then give up when it's cooled down and then chuck the thinners on it. I guess it's the challenge of getting some down the guide tubes.
Could end up like brandy with a Christmas cake = feed it a little, often
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Re: Injectors misbehaving but trying to understand the numbers
Oh mine gets fed a lot. I suppose that makes sense maybe a bit of carb cleaner might do the same job.i don't have a bottle of thinners I do have a bottle of carb cleaner though.
Darren
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Re: Injectors misbehaving but trying to understand the numbers
Cheaper sources available if buying larger quantities, but just over four quid at Wilcos
https://www.wilko.com/en-uk/wilko-cellu ... /p/0182560
Halfords have it too, GSF etc too.
Carb cleaner evaporates very quickly (as does thinners too I suppose!) But would guess that both would likely work equally well
https://www.wilko.com/en-uk/wilko-cellu ... /p/0182560
Halfords have it too, GSF etc too.
Carb cleaner evaporates very quickly (as does thinners too I suppose!) But would guess that both would likely work equally well
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Re: Injectors misbehaving but trying to understand the numbers
Thanks Matt I will let you know how I get on
Darren
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Re: Injectors misbehaving but trying to understand the numbers
have a look at this, hope it helps
https://www.aliexpress.com/item/1005004 ... FwAyRMfFN3
https://www.aliexpress.com/item/1005004 ... FwAyRMfFN3
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Re: Injectors misbehaving but trying to understand the numbers
Thanks for that, Interesting tool Its a bit expensive for my needs. I'm going to pull the bonnet. Brute force and ignorance combined with pent up frustration and plenty of expletives and chemicals will remove it.
Darren
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Re: Injectors misbehaving but trying to understand the numbers
Is it the X7 C5?
Bear in mind the bonnet will continue up to completely vertical. I tied mine up like that when taking gearbox off for slave cylinder replacement. Bungy rope between bonnet catch hoop and the roof rail, jobs a good 'un
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Re: Injectors misbehaving but trying to understand the numbers
Yes the car that just keeps giving. I was afraid of the corners snagging and chipping, but yes sounds like a plan overthinking as usual.
Darren
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Re: Injectors misbehaving but trying to understand the numbers
That'll work yeah likewise I have jackets from the early 90s that'll never fit me again but I refuse to accept it
Darren