hi bob update on my project if your pump is a two solenoid one i,ve found i had to put a switch on the lower sol wire [black/ white] or connect brown and b/w together i think i had to fool the ecm/nats system. it seems to have done the job. the previos owner had fitted a start button and done abit more wireing on ign systm so i had to ad lib abit .as the only w/diagram i have is from a 2002 one.hope yours goes easier.
fuel pump[ again]
- Thread starter Smegg
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Thanks smegg yes it is the two solenoid basically these solenoids will send a message through electrical impulses or an open and closed circuit.The ECU will then act according to its program.As my ECU never had a management light problem I think I can use the top off the old pump to fool the ECU it is still there and wire in the new pump stop solenoid through the old wiring.Well thats the plan LOL.
Thanks for the info it might well be very helpful.
The throttle pedal shouldn't be a problem as its fly by wire but still has a cable kick down so all I need to do is make the slit in the peddle longer and connect the new throttle cable.All the main electrics on the top of the pump do is work in place of the old mechanical throttle.So as long as the fly by wire thinks its still there it shouldn't be a problem.
yes Ray it does has the electronic box but it comes out of the side with the cover over it being Aluminium just like a vp 37.As I remember the vp44 has all the electronics on the top in a black box.It is a zexel copy of one or the other for sure as it is bosch licensed
Timbo_1975
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Bob, can you remind us what vehicle you are talking of here? AFAIK, the Terrano 2.7 never had anything more elabourate than the vp37 / zexel version, which is not coded to the ecu.
The Bosch EDC15c2 is certainly not a digital ecu either !!
The Bosch EDC15c2 is certainly not a digital ecu either !!
Its a 99 Terrano SE auto 2.7 TDI Timbo with what looks like a vp37 with uprated electronics(zexel) made under licence from Bosch.
According to the fella who works on these pumps all the time the zexel is coded to the ECU and you cannot even clear this ECU.
Of course he could be wrong but it matters not now as I am going to fit a mechanical pump and use the fly by wire to control the gearbox ECU.
Timbo_1975
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I would put money on that not being the case, but as you are going to the TD pump, then its all rather irrelevant .
If you have chance, perhaps a photo account of the swap might help future people!?
If you have chance, perhaps a photo account of the swap might help future people!?
Will do Timbo I think it is the best alternative anyway as my other half will be driving it and as I posted the other day this pump revved out on its own which could be very messy.
hi bob , seems like you know exactly what your doing,[thats a lot more than i did lol]. i replaced the pedal with the cable one and as i said my elec one was a bosch but i think that had been a replacment as i found afew soldered and taped joins iwasnt sure if it was the pump or the immobiliser system but as i need the car dependable [and being an old fart with c.o.p.d and used to old tech] i decided to retro it as much as possible i hope you can take some photos of the job as i havent been able to take good ones with my phone.and i know that between you timbo and ray you,ll come up with a better way of doing it. it will help i,m sure to keep a lot of these older tdi,s out of the scrap yard. [well i never had these probs with the mav] and i.m sure lots do.
Look on the bright side Smegg at least you don't have to work on it every weekend or be permanently welding it up.
Could be worse you could own a Landrover!
Just thought I would give you all an update.
I have got it running and driving with the manual pump.The main problem I have encountered is the Tacho/Rev counter picks it pulse from the old pump via a 4 pulse pick up.This is also instead of a crank sensor!
So the gearbox is slow changing up and the revs are high before the gearbox will change gear as it is not receiving any feedback from the pick up.
I am considering using the alternator as the pick.If like some it still used a crank sensor this obviously would not of been a problem.
Timbo_1975
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"cam" sensor is on the front of the timing case of the Zexel though, have you not left this inplace??
I certainly have not removed it Timbo I cannot see it either.I have searched high and low for another pick up but cannot find one.As I said I the only pick up I seem to have was on the side of the old pump which has a four pulse per revolution pick up.I will take another look tomorrow but at the very least this is the rev counter pick up so I have to work out another way for the rev counter to work.
There is a guy who does a box of tricks to convert the sine wave from the back of the alternator into a pulse so it might have to be one of them.
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Just been and measured my CKPS output against the alternator AC output.
The CKPS at idle is 21.23mS, at 4 PPR = 84.92mS or 706.54 RPM.
The AC element of the 36 pole alternator at idle is 1.95mS or 512.82Hz, this give an alternator shaft speed of 1709.4 RPM, so, roughly 2.5 times crank speed.
The alternator AC output is almost 11 times the frequency of the CKPS, so it will need some modification before you can use it for the TCM.
A divide by 10 might be close enough though......
Thanks Ray this box of tricks is adjustable for the pulley so I should be ok.
I will find a link in a bit.
http://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=128/prd128.htm
This should do the trick.
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This may be worth a look too, certainly the the price is ok
http://www.jaycarelectronics.co.uk/productView.asp?ID=KC5435&form=CAT2&SUBCATID=965#11
http://www.jaycarelectronics.co.uk/productView.asp?ID=KC5435&form=CAT2&SUBCATID=965#11
Thanks Ray I will give them a call tomorrow to see if this converts the signal.
Just to let you know Timbo I do not have any other pick up I have checked the bell housing and front cover.It maybe something to do with being an auto.:nenau
