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Engine Specific Info and Questions => IDI Engine => Topic started by: Smokey Eddy on September 15, 2008, 09:57:37 pm
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ok, after much searching for sticky injector solutions i've found nothing . maybe i suck at this but i have only found people saying "maybe its a stick injector"
ok! So i have two sticky injectors!!! what do i do about this? what does sticky even mean in this context? too high break pressure?
i must fix them because it is so severe it wont start anymore and i smoke an unruly amount not to mention the racket those two cylinders make with the sticky injectors
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means it wont break open properly,or its spitting diesel in.
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or its spitting diesel in.
Not good for the metal parts in your engine :-(
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Thanks for the input but this still doesn't help at all.
I know there is something wrong. I already know that.
I have no idea what to do about it??? do i need new ones or something.
Sorry for being so agitated I'm just really %$&%ed off with this piece of #$^^ car.
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Your options are new ones, rebuilt ones, or rebuilding them yourself and setting the pop pressure.
Good luck.
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get a new set of nozzles off ebay,send them to blackboostedtruck!!
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ok, after much searching for sticky injector solutions i've found nothing . maybe i suck at this but i have only found people saying "maybe its a stick injector"
ok! So i have two sticky injectors!!! what do i do about this? what does sticky even mean in this context? too high break pressure?
i must fix them because it is so severe it wont start anymore and i smoke an unruly amount not to mention the racket those two cylinders make with the sticky injectors
Be more specific...
It won't start yet it smokes? Do you mean it's hard to start?
How do you know its 2 injectors and not 1 or 3 :?
If testequipment is not available, then I'd do this... remove glowplug power. reverse fuel lines on pump so that they point up in the air. reattach injectors and get someone to crank for a few seconds whilst you watch from a safe distance... Cover some of them with cloth if wary :wink:
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get a new set of nozzles off ebay,send them to blackboostedtruck!!
yes i can do them! or since your in canada i suggest Giles or check with caveman i think he can do injectors now?
and thanks Ben for the recommendation!
Duane
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Pull your injectors and look at the tips. See if they all look the same. Find a diesel shop and ask them to check to pop pressure and spray pattern, that should be very cheap. They will either be correct or off. If they dribble fuel out and dont seal well you will start to melt things. If they are original and have more than 100,000 miles on them you may want to consider having them rebuilt. Lots of info on that process on the forum.
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I already did all that with the injectors less than a month ago.
The nozzles aren't 4 months old; thats the date of rebuild.
they are all within acceptable popping pressures when i checked 3 weeks ago.
I know which ones it is because you can hear it knock with a stethoscope.
I roll it down a hill to start it.
Yes, it smokes tons.
Grey/white smoke.
especially on idle.
All the tips looked fine 3 weeks ago.
I notced 1 of them leaks a bit from where they join together in the middle. The rest are bone dry.
Mark(The Miser)UK, thanks for the advice but i aleady know they're getting fuel because i cracked the lines a bit and diesel came out and tons of unburt comes out the tail pipe during cranking. And if anyone ever does that suggestion of turning them upside down and cranking, cover ALLLLL ALL ALL ALL your coolant hoses with tons of towels or paper towel because diesel will EAT them.
any tips other than to get new ones? :cry:
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Going with the fire fuel and air thought process, look at fire next. Check all of your glowpugs. If you get two that are bad it will cause these problems. Pull them and either check resistance or use some jumper cables to see if they glow cherry red quickly. If any of the tips look melty, you need to look at that injector again. If you have the injectors out, you can cycle the glow plugs and look into the head and see if they are working.
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Smokey,
Loosen nut on #1 injector line at the injector and raise it slightly . Turn on ignition and check that diesel pulse is indeed on TDC compression stroke [if you have an oil baffle you'll need toremove valve cover to see cam lobes. Other than that , you'll need t oremove injectors and check them again. Ingress of dirt can happen at any time I guess...
The absolutely best cleaner I've found so far is a spray on oven cleaner. Ancient carbon dissolves in minutes. Rinse with diesel and see how much carbon comes off onto a rag...
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ok, after much searching for sticky injector solutions i've found nothing . maybe i suck at this but i have only found people saying "maybe its a stick injector"
ok! So i have two sticky injectors!!! what do i do about this? what does sticky even mean in this context? too high break pressure?
i must fix them because it is so severe it wont start anymore and i smoke an unruly amount not to mention the racket those two cylinders make with the sticky injectors
Be more specific...
It won't start yet it smokes? Do you mean it's hard to start?
How do you know its 2 injectors and not 1 or 3 :?
If testequipment is not available, then I'd do this... remove glowplug power. reverse fuel lines on pump so that they point up in the air. reattach injectors and get someone to crank for a few seconds whilst you watch from a safe distance... Cover some of them with cloth if wary :wink:
i actually like this idea... but yes... stand far far away :lol: this test will prove to be much better than simply checking breaking pressure... this is a real test of how the injectors are performing inside the motor.
and about the new diesel eating coolant hoses, i doubt it... the new stuff that killed my old pump (well not killed, but made leak) was leaking all over my coolant hose going to the oil cooler, and it did that for a good long time-more than a drible too... and i'm still using that coolant hose to this day (that was about 2 years ago)
so old diesel = yes new diesel = very unlikely to eat your coolant hoses :wink:
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about the diesel:
I see.
maybe it was the cetane booster or something because something ate all my hoses. would coolant do it?
I'll do the oven cleaner thing. they were sooty when i had them pop tested and had only been in there a couple months. I'll do the upside down injector thing when i put the new head on.
The pump i think is way too advanced [hill billy style] and is causing some of the issue.
1 glow plug is out but i don't think that would cause the smoke on idle once it's already hot.
subsonic, what were you saying about looking melty. one of the glow plugs wasn't the same shape it was when i put it in. it once had a taper and now it looks like the round ceramic ones. So you said i need to look at that injector again. look for what?
I'm sorta building a new engine because this one is a piece but it's not very exciting compared to what most people are doing ... maybe i'll make a thread about it.
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JTanguay. I understand your concern about diesel pressure. Clarifying:
Unscrew nut fully, push it back over a bend. The fuel line will naturally move away a few mm often as not. No matter either way as the diesel will only come out like a pensioner having a wee :wink: Hand cranking with a wrench will suffice. This is one piece of advice a neighbour gave me that was useful when I first entered the world of diesel repairs. A small metered amount of diesel carries no pressure with an unrestricted tube. Only when confined/restricted will pressure develop.
Smokey,
Sometimes a glowplug will IMO swell of it's own accord , just like a cooker ring or mini grill element.
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ahhh i was worried that extra heat would be from a messed injector or something.
Ok so as a first step to fix my knocking injectors i'll clean them again with brake cleaner/oven cleaner/and then diesel
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subsonic, what were you saying about looking melty. one of the glow plugs wasn't the same shape it was when i put it in. it once had a taper and now it looks like the round ceramic ones. So you said i need to look at that injector again. look for what?
If you have a leaky injector or a bad spay pattern it can cause damage to the glow plugs. Bad enough problem with the injectors and you start melting things. So if you pull the plugs and one looks different than the others then then it might point towards the problem, ie leaky injector. If you know your timing is way advanced, and you have some wonky glow plugs, you bet you will have smoke even when it is hot, white smoke is unbuned fuel (or a blown HG). Been that route before.
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daves car actually dropped a pre cup into the piston from a leaky injector. i know when i had cars that would burn extreme amounts of oil, they would eat glow plugs a ridiculous amount
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As mentioned the glow plug has not been lanced; merely swollen. IMO it's a personal thing between 1 glowplug and its power supply :shock:
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Thanks mates.
I stop driving it. It's too much of a head ache. I'm always sweating and nervous driving it. If i wake up an hour earlier than normal i can drive my dad to the train and use his car until i build my new one.
So when i have the injectors out should i lap them and have them tested again?
The place i went to tested them for free which was pretty freakin awesome.
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Thanks mates.
I stop driving it. It's too much of a head ache. I'm always sweating and nervous driving it. If i wake up an hour earlier than normal i can drive my dad to the train and use his car until i build my new one.
So when i have the injectors out should i lap them and have them tested again?
The place i went to tested them for free which was pretty freakin awesome.
If injector is not leaking then don't lap.... Unless you are not happpy with break pressure. Do dismantle and clean though.
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ok!
So a knocking injector usually means is dirty in some fasion or another. Thanks guys :roll: 8)
If i have the nozzles sit in brake cleaner that wouldnt be detramental to anything would it? There aren't any like ... seals in the nozles that would get messed up or anything
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ok!
So a knocking injector usually means is dirty in some fasion or another. Thanks guys :roll: 8)
If i have the nozzles sit in brake cleaner that wouldnt be detramental to anything would it? There aren't any like ... seals in the nozles that would get messed up or anything
Cleaner fine... everything metal
IMO a knocking injector can mean a good injector, or even your best injector, as the knock can be a sign of perfect combustion. Or maybe break pressure lower than others and so advanced relative to others...
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I'm going to go with ... NOT perfect combustion because my engine is messed up.
I think everything is too advanced to make up for the poor starting ability.
Shall soon be all fixed though! :D
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W00t sauce, i fixed the starting issues (except when hot, hot = low compression but never mind that it's much better now)
It's getting slightly colder as im sure most of you know and now in the morning when i start her up she starts quick like 2-3 seconds cranking (thats quick for me) but even with the cold start out it will stall unless i keep my foot on it. I can hold the pedal to the floor for about 5 seconds and it will slowly climb up the rpm and then shoot up and run a little better but still sounding like its on 2 cylinders.
I turned the fuel screw out as far as it would go before it started to sound different and it's still really fast if i put my foot into it and excess fuel i will see behind me (my economy is really pityful 1litre to 10km so im trying to make it better until i can build my new motor)
it's not a pressing matter as im rebuilding within a month but it's frustrating and i was wondering if there are any suggestions. If i turn the fuel screw up it doesn't start so good and im not a fan of the high idle or the smoke/high egt/REALLY bad economy that comes with doing that.
Perhaps adjusting the residual fuel screw or something would help without raising the idle too too much like the fuel screw does?
even when its warm when i stop at a light it chuggs unless i pull the CS out. only when its HOT HOT will it not chugg on idle.
I suppose its possible to turn the fuel screw in slightly enough to make a difference but i also thought this could be an injector problem because two cylinders are definately fine when its chugging and you can feel in the cycle 1 or 2 that aren't fireing very well (or at all)
just gotta bite my lip for the time being?