Sebastian
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| posted on 3/9/09 at 07:59 PM |
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Injector problem.
I have been working on my engine again, a Zetec 2.0 with a (older) Dunnell system now the following problem occures, i asked in the past where the low
resistance blue injectors cam from and the outcome was Cosworth, but now i fitted the injectors and the engine gets way to much fuel and can't
get the emmission in the correct percentage even after turning the fuelpressure way back it still stays to high also adjusting the mixture with the
laptop doesn't give the required result, so i am looking into which injecrots to use now which are giving less fuel.
Any ideas??
Is there someone using an older Dunnell system out here.
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big_wasa
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| posted on 3/9/09 at 08:01 PM |
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How standard is the engine ? Try standard blacktop ones there end fed.
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Sebastian
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| posted on 3/9/09 at 08:05 PM |
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The engine is a standard 2.0 silvertop from a Mondeo.
Are the standard ones also low resistance?
The ECU is a AAE i believe.
@ biw-wasa what do you mean by End Fed??
[Edited on 3/9/09 by Sebastian]
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big_wasa
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| posted on 3/9/09 at 08:20 PM |
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Fuel entry at the end instead of the side like the early zetec ones.
Are these in a set of Tb's ?
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Sebastian
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| posted on 3/9/09 at 08:27 PM |
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I have a throttlebodie set with the 4 injectors in it so 2 "houses" with each 2 injectors.
And since the guy i bought it from used the injectors on his new engine i don't know what the specs are of the injectors and he can't find
any markings on them.
I still have a picture in my archive zetec of a similar system.
[Edited on 3/9/09 by Sebastian]
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big-vee-twin
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| posted on 3/9/09 at 10:01 PM |
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I had an emissions problem with my R26 it took a while to find out the issue.
The problem was that an injector had an incorrect spray pattern so although the engine ran fine emissions were a problem I changed the injector and
problem went away.
I did think at the time too much fuel because I could smell un-burnt petrol in the exhaust, but because the spray pattern wasn't correct this
was causing the fuel not to fully burn.
So do your injectors need cleaning? how old are they? were they new when you got them?
[Edited on 3/9/09 by big-vee-twin]
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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jeffw
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| posted on 4/9/09 at 05:38 AM |
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The pictures you have in your archive are they your car ? Is the water temperature sensor connected to the ECU as it sounds like it is in warm-up
enrichment.
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Sebastian
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| posted on 4/9/09 at 06:33 AM |
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The injectors are as good as new and it seems he gets to much fuel because after a time of driving it really starts badly but when it starts he first
blows out al lot of unburned fuel (black smoke) and then runs perfect but after a time when it runs at idle he just drops out so we think he then
again gets to much fuel, so that's why we think that the amount of fuel and the spray pattern is just to rich for this system.
So it's not just the emmmission but the overall running of the engine that isn't good, when i drive i reallly have to keep the revs high
in order to drive away and when downshifting for a corner it also doesn't pick up on the throttle as it should do unless i give a lot of
revs.
@ jeffw, the picture is not my car but a system fitted on a car from a friend of the guy i bought the system from and this is exactly the same system
and i also have everything fitted as it should be, so i don;t think this should be an issue and all the sensors work fine according to the laptop.
[Edited on 4/9/09 by Sebastian]
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jeffw
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| posted on 4/9/09 at 06:53 AM |
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what capacity are the injectors ?
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Sebastian
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| posted on 4/9/09 at 08:28 AM |
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I don't exactly know the capacity but i do have some numbers, i have a brand new set as back up but what i noticed is that out of the four
injectors 3 have the same number and 1 has a different, this is also the case with the ones fitted now so is there a order you have to fit them
meaning is de 1 with the different number the first or last?
The numbers on it are the following:
3 with the number 0664/10
1 with the number 0634/10
Also found the number: IW 044
Can you tell what the capacity is through these numbers?
[Edited on 4/9/09 by Sebastian]
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jeffw
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| posted on 4/9/09 at 08:37 AM |
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Where did you but them from ? Are they Bosch ? Whoever you bought them from should be able to tell you what capacity they have.
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Sebastian
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| posted on 4/9/09 at 10:11 AM |
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OK i will try to contact the guy i bought them from and try to figure out the capacity.
They are from Weber btw.
[Edited on 4/9/09 by Sebastian]
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will121
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| posted on 4/9/09 at 11:38 AM |
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lots of info and links on injector flow rates and pictures on this previous post
injectors
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