80 Series Fuel Injector Removal & Cleaning

[Ebag333]

Originally Posted by gnob

you arent supposed to be able to pass air through the bottom port.

As I understand it the bottom port is a 1 way valve. It's supposed to vent out (down) but not in (up).

If that weren't true than the FSM test would show no air coming out, not air being pushed out of the bottom port.

Very easy to test with just one mouth and two hands. My valve hasn't failed the test (only vents one way), but since it is difficult to vent I'm suspecting carbon buildup that is going to cause it to fail completely in the not too distant future.

[gnob]

most of my experience comes from the minis,
the 80 may use a differennt modulator.
but that being said, they either work from positive back pressure, or negative.

the mini uses pos back pressure, which means the exhaust gas pushes into that lower port which moves a diaphram which closes the vent port allowing vacuum across the mod.

so you are right saying its a one way valve. in that it actually only vents out, going in stops from the diaphram. in which case if you blow into the lower port and cant blow then its right.

[TOY350]

Wheeler will have the new one in tomorrow. I will try the blow test there along with mine and if they are the same I won't bother replacing it, especially since I wasn't throwing a code yet.

[TOY350]

Oh and another thing, we are thinking my headgasket has already been done previously. I can't track via the limited service history I have but the amount of non oem hose clamps, replaced PHH, loose lower intake manifold bolt and other things makes it look like the lower half of the intake has been removed and the head is the only reason I can see for removing the lower half.

[Ebag333]

If your HG has been done, then no real reason to remove the EGR.

But for my non-replaced HG's, it's a consideration in an attempt to reduce possible damage to the HG...

[TOY350]

I would like to know if the HG has been done and I can't think of any way to figure it out other than guessing.

[Ebag333]

I would post and ask on the 80's forums. But IIRC it's been asked before and the answer is "take it apart and see".

What about doing a Carfax and trying to track down PO's?

[tblume]

Originally Posted by TOY350

Very interesting indeed...

where's the diabolical laughter guy?



Buwahhaaahaaahaaaaaaaa!

that simple? radio shack here I come, after a catch can search that is...

[retrofive]

IRCC in the 80s FAQ there is a section on "attempting" to see if your HG has been replaced..... although after lots a reading and theories in the FAQ, pretty much leaves it at open it up and look.

On the EGR note, mine was throwing a 71 code leading to the EGR. After Gabe cleaned up both our trucks throttle bodies and checked the EGR and some of the tubes my CEL went away.

One thing we noticed on the filter inside the EGR both of our had a pretty carbinated black spot on the rough/thicker side of the filter. We both just spun the filter 180 thinking can't hurt.

[Ebag333]

Originally Posted by tblume

:
that simple? radio shack here I come, after a catch can search that is...

Fri or Sat I'm going by Big-R to pick up the diesel tractor oil/air separator. I can post a pic of it after I pick it up.

Do you have emissions up there?

If you do it, take lots of pics so we can copy you. Or print out the evidence and send Al Gore after you in his private jet.

Originally Posted by retrofive

my CEL went away.

For now!

[TOY350]

Originally Posted by Ebag333

I would post and ask on the 80's forums. But IIRC it's been asked before and the answer is "take it apart and see".

What about doing a Carfax and trying to track down PO's?

Have a car fax and nothing noted. Have printout from dealership where service was done and they purged everything out prior to 9/99 so they can see further than that. From then on they don't reference anything major and there wasn't any warranty repairs done on the vehicle that they could track either. Not sure I want to call someone and say "you know that Cruiser you had like 9 years ago..."

[tblume]

Originally Posted by Ebag333

Fri or Sat I'm going by Big-R to pick up the diesel tractor oil/air separator. I can post a pic of it after I pick it up.

Do you have emissions up there?

If you do it, take lots of pics so we can copy you. Or print out the evidence and send Al Gore after you in his private jet.

none here, PDX yes but I will not live there again.

the thing that has me hesitating is the higher EGT's and retarded timing thing, but I hate the idea of popping the head gasket 'cause number six is the only one sucking the fumes, maybe time for another thread? surely this is internet piracy, sorry #1 super guy

[Ebag333]

Originally Posted by TOY350

Not sure I want to call someone and say "you know that Cruiser you had like 9 years ago..."

For something that important, I'd call 'em.

Originally Posted by tblume

the thing that has me hesitating is the higher EGT's and retarded timing thing, but I hate the idea of popping the head gasket 'cause number six is the only one sucking the fumes, maybe time for another thread? surely this is internet piracy, sorry #1 super guy

Higher EGT's and retarded timing?

AFAIK if you're spoofing the intake temp sensor, than there should be no other changes other than to the EGR. And you're simply saying "hey, it's working right".

[tblume]

HIJACK - ON! last one, sorry...

quote" Higher EGT's and retarded timing?

AFAIK if you're spoofing the intake temp sensor, than there should be no other changes other than to the EGR. And you're simply saying "hey, it's working right". "quote

been reading up on the thread for the EGR delete/fooler/emulator; there is a valid point to the EGR system in that with cooler exhaust temps more advanced timing is used=better power and economy. BUT, is that true for non boosted engines? I have to imagine with the ethenol blend we run now temps may be cooler already? also, it just makes no sense to mix more inert gasses in one cylinder to cool the total exhaust flow. (I think that is how it works) I'm still reading up on that whole system and it's related threads, tempted to do the mod if only to keep my HG worries at bay.

when I get time to really research the thing I'll post a new topic, HIJACK OFF!

(sorry, not you, coworker just walked in)

[TOY350]

Got the new blue top modulator and it passed the blow test, my green was bad for sure now. I plan on starting to put it back together Friday through Saturday if my injectors are back on Friday.

[Ebag333]

Are you going to test any of the other EGR components while you have it torn apart?

I know the VSV is a pain to get to...might be easier with all that open. (Also possible consider the VSV relocation mod.)

[TOY350]

Thought about it but I haven't thrown a code. I will be leaving it in place and kick myself down the road if it fails. Haven't tested any other parts but might tomorrow.

[Ebag333]

Originally Posted by TOY350

Thought about it but I haven't thrown a code. I will be leaving it in place and kick myself down the road if it fails. Haven't tested any other parts but might tomorrow.

Just curious but how accessible is it with the truck torn apart the way it is?

If you have to do more digging, then it's probably not worth it. But if it's exposed.....

[beno]

Originally Posted by Ebag333

I'm planning on doing my catch can when I get the replacement PVC hose from cdan.

Not sure where I'm going to mount it or route it yet. Don't want to put it near the exhaust, so it may go on the (already crowded) drivers side.

I went to NAPA and got a small lawnmower fuel filter and put it in-line with the PCV line. You should see the stuff that thing collects. I've already swapped it out once in one year.

Well worth the $1 for the filter.

-o-

[Ebag333]

Originally Posted by beno

I went to NAPA and got a small lawnmower fuel filter and put it in-line with the PCV line. You should see the stuff that thing collects. I've already swapped it out once in one year.

Well worth the $1 for the filter.

-o-

Is once a year often enough? Seems that it would saturate and start feeding oil into the intake.

And want to weigh in on this thread?

[TOY350]

EGR tested out fine today. Looked at the VSV and it easily accessible at this point but moving it looks like a pain. But I know, kick myself if I don't down the road.

The inline filter seems like a real simple way to go especially if I change it with every oil change. I probably will go that route and buy a dozen and keep them on the shelf.

[TOY350]

On the FSM it shows PCV hose 1 and 2. #1 is the PCV valve and hose from valve cover to the intake. #2 is a larger hose and NO PCV VALVE going from the valve cover to the throttle body. Inside the throttle body I can see the port and the oil it has been sucking in. What is this second hose without a PCV valve for? I think I will filter both of the hoses and monitor them.

[Ebag333]

You're talking about the one on the passenger side and the other on the drivers side?

IIRC the one on the DS is used for super/turbo charged application. Turbocruiser put a filter on there but it caught almost nothing.

[TOY350]

The driver side is the PCV valve line and the passenger is not valved. I cross posted into the 80 section to see what they come up with.

[TOY350]

Putting it back together wasn't bad at all. Here are the numbers from the injector cleaning. I will post back after I run a couple of tanks and see if there is any mileage increase.

[Ebag333]

Originally Posted by TOY350

The driver side is the PCV valve line and the passenger is not valved. I cross posted into the 80 section to see what they come up with.

So I got my care package today, and pulled off those two hoses to replace them.

The bigger one (on the PS, going into the intake) was slick with oil. Smelled like dirty oil, but not too bad.

The smaller one (on the DS, going into the throttle body) was not only slick with oil, but had carbon deposits inside it. It smelled very burnt and nasty.

I'm thinking that I'm going to be putting a filter on both of them now.

Originally Posted by TOY350

Putting it back together wasn't bad at all. Here are the numbers from the injector cleaning. I will post back after I run a couple of tanks and see if there is any mileage increase.

Interesting. So they say that you're getting 10 HP by cleaning them. (Not at the wheel, of course.)

[Kief]

Interesting stats. I would think the dripping would be real bad but the flow is really a pretty small percentage, will be interesting to see what the gains are mileage wise.
I would assume a lot of your driving involves short trips and the motor spends a fair amount of time running at less that fully warmed up which would mean less than optimum operating conditions. I think I'll go buy some injector cleaner just for fun..

[jamister1]

I'm guessing maybe a little power might be picked up by the cleaning, probably won't be able to tell from the seat of your pants though. Might run a little smoother too. At least you know your injectors are all in good shape now.

How much did the cleaning cost for future reference. I know new injectors are $$ so it would be nice to just get them serviced as a good alternative.

[TOY350]

The cleaning was $165 including the 2 day shipping back to me. If the shop in Medford can do them I bet it would be around $120 to $150 for the job and you can save on shipping. I didn't contact them so I don't know if they do a readout or not, which isn't really necessary but for those of you that know me...well then you know why I wanted the printout

So far it does seem to ride smoother and takes less pedal in some areas I drive regularly. True test will be the next two tanks of gas though, I'm not holding my breath though, I seem to be a magnet for bad mileage and overheating in every Cruiser I have owned so far

[2ndGenToyotaFan]

back attcha!!!