engine missing
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Adz
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Can anyone tell me what it does, as far as I am given to understand it is on the return pipe to the tank,why would you want to filter the fuel FROM the pump (which should have good clean fuel anyway), the only reason I can see is to provide a fixed pressure to the pump by reason of a return restriction, but I have not seen one of these filters, Briggies did not have one, and I run a petrol, but I find id hard to see that gause filter could provide such a restriction? Rick
Toolbox
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Its in the inlet supply to the pump so restricts the amount of fuel when dirty, it’s a sort of last resort filter stopping any thing that gets past the main fuel filter due to poor fuel servicing maintenance or crap filters.
Its very common in many fuel pumps of its era CAV/ Delphi had them in for years.
Its very common in many fuel pumps of its era CAV/ Delphi had them in for years.
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That make much more sense, do not know where I got the idea it was on the outlet, and did not think to check Briggies at the time, checked the banjo for the filter while engine out, but much more interested in the drive plate issue, on the Perkins 6 354 in line 6 truck engine with a CAV rotary pump with hydraulic govnor they had a return banjo bolt on the filter with a metering hole in it, and if it got blocked or restricted smoke and poor running was the result, most did not even know it was there but it played havok with the govnor, Rick
i have a 98ish, not sure age, on irish plates, v5 is vauge, "declared new after 31st of dec 97"?
anyway, car was down on power, i have put 5000 miles on it in last 6 weeks, and on friday started to missfire.
so today i decided to find minifilter,it was not where it shown in downloads, no sign in pump or banjo.
long story short, after finding sign of egr type thick black gunge in inlet manifold, so removed to clean manifold, and properly blank off egr, i will make a plate that cover hole to exhaust, lots of scraping and soaking to make clean, but build up of gunge must have been +15mm in places, maybe more, engine didnt smoke,and was doing 27mpg, at motorway speeds, and over longish drives.
so manifold off, for some reson i chose to take out rear banjo fitting to zyxel fuel pump, would be hard to do without manifold off, anyway, mini filter is in rear banjo of my maverick, it has a ball bearing spring and gauze filter, i asume the spring and ball are some sort of syphon back arrester? to stop fuel returning to tank overnight? gauze filter in banjo of return? i have no idea, it was filthy, and crimped in place, plenty of clean diesel and wd40 cleaned it, i can now blow through it, so are all ones that peopel thought were removed, actualy in the return pipe?
anyway, car was down on power, i have put 5000 miles on it in last 6 weeks, and on friday started to missfire.
so today i decided to find minifilter,it was not where it shown in downloads, no sign in pump or banjo.
long story short, after finding sign of egr type thick black gunge in inlet manifold, so removed to clean manifold, and properly blank off egr, i will make a plate that cover hole to exhaust, lots of scraping and soaking to make clean, but build up of gunge must have been +15mm in places, maybe more, engine didnt smoke,and was doing 27mpg, at motorway speeds, and over longish drives.
so manifold off, for some reson i chose to take out rear banjo fitting to zyxel fuel pump, would be hard to do without manifold off, anyway, mini filter is in rear banjo of my maverick, it has a ball bearing spring and gauze filter, i asume the spring and ball are some sort of syphon back arrester? to stop fuel returning to tank overnight? gauze filter in banjo of return? i have no idea, it was filthy, and crimped in place, plenty of clean diesel and wd40 cleaned it, i can now blow through it, so are all ones that peopel thought were removed, actualy in the return pipe?
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I do not have a diesel so no first hand on this, but I have raised this issue before and as an ex diesel engineer cannot for the life of me think what a filter can do on the return, a gauze filter at that, :nenau:nenau:nenau Rick
R1cho
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undo ya fuel cap makesure u not got a vacuum goin on, i had a fuel leak got it fixed still had white smoke and a misfire, mine was a simple solution found by accident when i went to refill, undid fuel cap to refill and had a big intake of air, sorted the misfire and white smoke
reduction in intake appertures of manifold will be a big issue on performance, +15mm is bad, have seen this loads on renault/nissan engines, but not on proper nissans, has anyone else come accross egr marmite in manifold?
look at all the racers who port or free flow heads for performance.
it is egr/exhaust soot mixing with oil vapour, i have cured oil vapour by using good qaulity oil now.
but without removing pump or manifold, checking rear return pipe for filter would be hard.
the banjo bolt has a central bolt, this allows spring and ball to be removed, some people on here have mentioned in tdi, a similar discription in inlet to pump, i will get a picture, so someone can compare, but could the spanish man building it, get it wrong?
if banjo bolt looks the same as some have seen in inlet, maybe they left filter in, and just used its ball and spring, to stop leaking back to tank overnight, lrts face it, they may have decided it would never clog as in return, i tried blowing, and very limited flow, if any.
i had already followed link on download section for egr mod, but mine was probably stuck open, so mod would not have worked, off out to make blank plate and rebuild, got to get ready today, as need for work.
look at all the racers who port or free flow heads for performance.
it is egr/exhaust soot mixing with oil vapour, i have cured oil vapour by using good qaulity oil now.
but without removing pump or manifold, checking rear return pipe for filter would be hard.
the banjo bolt has a central bolt, this allows spring and ball to be removed, some people on here have mentioned in tdi, a similar discription in inlet to pump, i will get a picture, so someone can compare, but could the spanish man building it, get it wrong?
if banjo bolt looks the same as some have seen in inlet, maybe they left filter in, and just used its ball and spring, to stop leaking back to tank overnight, lrts face it, they may have decided it would never clog as in return, i tried blowing, and very limited flow, if any.
i had already followed link on download section for egr mod, but mine was probably stuck open, so mod would not have worked, off out to make blank plate and rebuild, got to get ready today, as need for work.
ok, more news, the throttle/butterfly device on inlet manifold, appears to be linked to egr system, anyone else agree on this? It appears it works in tandem with egr, so as egr opens the butterfly closes, makes sort of sense, as air coming in from intercooler would otherwise collide with hot air from egr? So does this butterfly even or try and even the two incoming airs out?
If this is the case, doing egr mod will stifle/strangle engine, as with no egr air coming in and butterfly limiting incoming air?
So I have remove plate on butterfly as well as blanking both ends of the egr system, also deguncked all of the inlet manifold and cleaned out intercooler and inlet pipes to turbo.
As I said in an earlier post, oil vapor was bad when lifting oil cap and dipstick, changed oil to Castrol (no idea what was in it, or how old) and now no oil vapour from dipstick or filler cap, I went for 20/40 as I felt the heavier grade would be beneficial for an old engine.
So off out now to complete rebuild, and then test, I am lucky in that I do a high mileage, which at present someone else is providing fuel/expense for, so over last 4500 miles, about 4 weeks, I have averaged 27 mpg.
Drive has been great, but intermittent kangarooing and missing at low revs, normally when cold, or after being stuck in traffic.
I have lots of miles to do over the coming weeks, so should be able to see if the egr removal is worthwhile, maybe going to France this weekend, so that would be best part of 1500 over a few days, hopefully I can get at least a few more mpg, 2 or 3 would be brilliant.
Thoughts on egr / butterfly setup use would be nice.
also on the old setup, why are we bothering with intercooler, then stuffing hot gas in? surely if egr is open at low revs, inetercooler is not used, and when it is used it will at least for a short while have to cool down the inlet manifold before it become effective?
new cars, i believe for this reason, cool the egr incoming air, in a sort of aftercooler?
If this is the case, doing egr mod will stifle/strangle engine, as with no egr air coming in and butterfly limiting incoming air?
So I have remove plate on butterfly as well as blanking both ends of the egr system, also deguncked all of the inlet manifold and cleaned out intercooler and inlet pipes to turbo.
As I said in an earlier post, oil vapor was bad when lifting oil cap and dipstick, changed oil to Castrol (no idea what was in it, or how old) and now no oil vapour from dipstick or filler cap, I went for 20/40 as I felt the heavier grade would be beneficial for an old engine.
So off out now to complete rebuild, and then test, I am lucky in that I do a high mileage, which at present someone else is providing fuel/expense for, so over last 4500 miles, about 4 weeks, I have averaged 27 mpg.
Drive has been great, but intermittent kangarooing and missing at low revs, normally when cold, or after being stuck in traffic.
I have lots of miles to do over the coming weeks, so should be able to see if the egr removal is worthwhile, maybe going to France this weekend, so that would be best part of 1500 over a few days, hopefully I can get at least a few more mpg, 2 or 3 would be brilliant.
Thoughts on egr / butterfly setup use would be nice.
also on the old setup, why are we bothering with intercooler, then stuffing hot gas in? surely if egr is open at low revs, inetercooler is not used, and when it is used it will at least for a short while have to cool down the inlet manifold before it become effective?
new cars, i believe for this reason, cool the egr incoming air, in a sort of aftercooler?
wow just completed test drive, and wow!!
upon power, easier to start, no smoke what so ever.
i can now hear the turbo spooling up, never heard it before, to this extent.
very worthwile way to spend weekend, i am hoping that the free breathing engine is now going to return some etra mpg, will top tank up in morning, about 400 mile journey, so will see what we see, used to do about 400 to a tank, which worked out at about 27ish mpg.
no rattles on switch off, which i had read the butterfly throtle thingy stopped, so maybe i am right about it, seesawing the egr with fresh air? sort of makes sense, and i note it is classed as egr on the vacume switching thing, so as egr opens, it closes?
whatever, WOW!!
upon power, easier to start, no smoke what so ever.
i can now hear the turbo spooling up, never heard it before, to this extent.
very worthwile way to spend weekend, i am hoping that the free breathing engine is now going to return some etra mpg, will top tank up in morning, about 400 mile journey, so will see what we see, used to do about 400 to a tank, which worked out at about 27ish mpg.
no rattles on switch off, which i had read the butterfly throtle thingy stopped, so maybe i am right about it, seesawing the egr with fresh air? sort of makes sense, and i note it is classed as egr on the vacume switching thing, so as egr opens, it closes?
whatever, WOW!!
lacroupade
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27mpg is extremely good in mixed driving.....and I have a feeling the butterfly you refer to is an anti-shake valve that operates on shutdown?
hello, 27mpg is not what they sold them as, and to drive it now, it seems so much free'r, breathing properly.
i had also read the vale was ashut down method, which struck me as odd, but refering to manual, i appear to be right
buterfly closes at egr opens and vice versa, makes sense, or with egr open and inetrcooler inlet open, to apposing gass's fighting each other.
so if i am correct, and below is extract from manual page 431, then those who have done ball bearing mod on egr, may well not have disabled throtle butterfly, limiting air to combustion, and reducing power increasing smoke.
engines as we all know need air to breath and prosper.
The EGRC-solenoid valves A and B, control vacuum pressure acting
on the EGR valve. The EGR control valve will be fully opened,
half-opened or fully closed, as required.
The throttle control solenoid valve controls vacuum pressure acting
on the throttle control valve. Thus, intake air passages are opened
or closed in relation to exhaust gas and intake air. Utilizing the
relationship between exhaust gas pressure and intake air pressure
control, the amount of EGR (exhaust gas recirculated) is regulated
in three approximate measures — large, medium, small.
Engine coolant
temperature
°C (°F)
Load
EGRC-solenoid valve Throttle control
solenoid valve EGR valve Throttle control
valve
Amount of EGR
A B gas
Below 45 (113) Any OFF
(Closed)
OFF
(Closed)
OFF
(Closed) Fully closed Fully open —
Above 45 (113)
Low load ON
(Open)
ON
(Open)
ON
(Open) Fully open Closed Large
Medium load-1 ON
(Open)
ON
(Open)
OFF
(Closed) Fully open Fully open Medium
Medium load-2 ON
(Open)
OFF
(Closed)
OFF
(Closed) Half open Fully open Small
High load OFF
(Closed)
OFF
(Closed)
OFF
(Closed) Fully closed Fully open —
i had also read the vale was ashut down method, which struck me as odd, but refering to manual, i appear to be right
buterfly closes at egr opens and vice versa, makes sense, or with egr open and inetrcooler inlet open, to apposing gass's fighting each other.
so if i am correct, and below is extract from manual page 431, then those who have done ball bearing mod on egr, may well not have disabled throtle butterfly, limiting air to combustion, and reducing power increasing smoke.
engines as we all know need air to breath and prosper.
The EGRC-solenoid valves A and B, control vacuum pressure acting
on the EGR valve. The EGR control valve will be fully opened,
half-opened or fully closed, as required.
The throttle control solenoid valve controls vacuum pressure acting
on the throttle control valve. Thus, intake air passages are opened
or closed in relation to exhaust gas and intake air. Utilizing the
relationship between exhaust gas pressure and intake air pressure
control, the amount of EGR (exhaust gas recirculated) is regulated
in three approximate measures — large, medium, small.
Engine coolant
temperature
°C (°F)
Load
EGRC-solenoid valve Throttle control
solenoid valve EGR valve Throttle control
valve
Amount of EGR
A B gas
Below 45 (113) Any OFF
(Closed)
OFF
(Closed)
OFF
(Closed) Fully closed Fully open —
Above 45 (113)
Low load ON
(Open)
ON
(Open)
ON
(Open) Fully open Closed Large
Medium load-1 ON
(Open)
ON
(Open)
OFF
(Closed) Fully open Fully open Medium
Medium load-2 ON
(Open)
OFF
(Closed)
OFF
(Closed) Half open Fully open Small
High load OFF
(Closed)
OFF
(Closed)
OFF
(Closed) Fully closed Fully open —
i drive a lot for work, until 6 weeks ago i had a 57 plate xtrail.
so cover mega miles, 27mpg is mixed driving pre egr and flap removal, did you blank off egr or do bearing insert?
was your manifold clogged up?
driving it now it seems so much more responsive, hopefly get the 33 or 30 as nissan sold it on as new, anyone ever get that figure?
so cover mega miles, 27mpg is mixed driving pre egr and flap removal, did you blank off egr or do bearing insert?
was your manifold clogged up?
driving it now it seems so much more responsive, hopefly get the 33 or 30 as nissan sold it on as new, anyone ever get that figure?
kbekl
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- 1,516
are we talking about the xtrail here ??
also if we are talking about the ford then it was never said to do more than 30 according to my hand book for the car it was 25mpg
also upon a little research recently the mav is also different to the terrano my glx had less power than the equivilent terrano also had less torque as well
hello,
no we are talking about maverick/terrano, just mentioned xtrail in conversation, sorry if it was confusing.
not sure why maverick would have difernt values,all came out of same factory in spain.
before ridding car of egr system i was getting 27mpg average, doing about 200 to 300 miles per day.
car seems better now, so will report back in any increase or decrease in this figure.
no we are talking about maverick/terrano, just mentioned xtrail in conversation, sorry if it was confusing.
not sure why maverick would have difernt values,all came out of same factory in spain.
before ridding car of egr system i was getting 27mpg average, doing about 200 to 300 miles per day.
car seems better now, so will report back in any increase or decrease in this figure.
by chance came accross official nissan figures;
Transmission: M5
Engine Size: 2664.00 cc
Fuel Type: Diesel
MPG Urban: 23.90 mpg
MPG Extra-urban: 32.80 mpg
MPG Combined: 28.80 mpg
CO2 Emissions: 260.00
Euro Safety Standard: III
Noise Level: 73.00
Transmission: M5
Engine Size: 2664.00 cc
Fuel Type: Diesel
MPG Urban: 23.90 mpg
MPG Extra-urban: 32.80 mpg
MPG Combined: 28.80 mpg
CO2 Emissions: 260.00
Euro Safety Standard: III
Noise Level: 73.00
