Bump to the top. Anyone?

 

You can somewhat test the FPR by applying vacuum to the top of the regulator while the pump is running (engine off). You should be able to hear the sound change as the pressure rises and falls. Other option is to pinch the return line and you should feel/hear the pressure change. Or try loosening the fuel line to the cold start injector and see if fuel comes out or pull the CSI out and put the end in a jar and see if fuel squirts out while cranking the engine over.

 

Ok, this sucks...I just came in from testing the FPR, and it seems that the FPR is not my problem. I unhooked the fuel line running to the cold start injector and turned the ignition on and fuel sprayed out of the line. So, it's gotta be the injectors right? I just wanna double check with someone before I go tearing the intake manifold off and replacing injectors. So, anybody think it's the injectors? What do ya think?

 

See link below for some tips on checking the injector wire splices, a common failure point on the 22REs:
http://www.4x4wire.com/forums/showfl...=&fpart=1&vc=1

 

brilliant job at following the leads and systems to the op!
i dont see much more to be done then to focus on the injectors.
rip em out and get the best replacements you can ,i say...
to not even run...jeez..im leanin towrd them being dead..
just imo

 

I'm getting ready to walk outside now and start the tear down of all those wonderful vacuum lines and everything else! Haha. Thanks for the link to those injector wire splices. I'll come in every once in a while with a question or something I'm sure. Thanks again...and I'll update soon!

 

Ok, first question...I got the fuel rail off and towards the front of the rail there's a little metal canister type thing...it has a fuel line running off of it down towards the fuel filter. I'm not sure what it's called...but...I took the little plastic cap/covering off the canister and there was a little tiny screw sitting in the plastic cover piece that came out of the metal canister. I don't know if there's something special I have to do to it or not...so I just screwed it back in the metal canister. Is what I did alright, or am I missing something here?

 

fuel pulsation damper is what it sounds like. That may be why there was no pressure to keep the truck to running?

was it leaking fuel?

 

Well, I screwed that little screw back into place, when I found it. When I was tearing it all down and opened the plastic cap...there was no fuel in it. But, I haven't tried starting the truck in a few days, so if there was any fuel leaking in there, it probably would have evaporated anyways. So, I'm not sure if it was leaking or not I'm letting the injectors clean in some injector cleaner tonight, and then tomorrow I'll start putting it all back together....HOPING that cleaning these injectors will solve the problem. I'll be back tomorrow with some updaes. Oh, when I'm putting the new injector O-rings back on...do I need to put any grease or gas on them before installation? Thanks!

 

Yes, use gasoline or vaseline on the o-rings before sliding the injectors in. Push then in slowly and twist a little bit as they slide in. You want to be able to move them around smoothly and easily once they are inserted to ensure the o-ring has stayed in place and not slipped of.

 

Cool beans...that is what I'll be doing this afternoon when I get home from work. As aggrevating as this whole process has been...I've loved getting to know a little about Toyotas. And thanks again to everyone who has helped me out with the truck. Other than the 18 or 19 vacuum hoses on the truck...it's been a fairly easy job...and the hoses aren't hard to deal with...just annoying. But, I did label every single hose and connector they hook to so I won't have the headache of trying to figure out where they all go when I'm finishing up. Alright, I'll have an update when I get home and get back under the hood!

 

I want to blow this stupid 4Runner up! I just got done putting the fuel rail and injectors and intake manifold back on the truck...only to have the same results as before! I let the injectors soak in cleaner for over 24 hours, and that broke loose a lot of crap out of them, I reinstalled them and tried firing it up, and it runs for a second or two and then dies out, just like before. Same freakin thing is happening. Could it be that the injectors are just shot? I know I'm still getting fuel up to the cold start injector. But after that, I really have no idea. Anybody have any advice on what the heck I can check next? I'm almost to the point of taking it somewhere...but I don't wanna get screwed by some dumb mechanic that knows even less that I know. Haha. Anybody?

 

I'd say a fuel pressure check would be very valuable right now. You have access to a gauge?

I don't think disconnecting the vacuum line to the pressure regulator is a surefire way the tell if it's functioning properly. It could be stuck sending most of your fuel back to the tank, giving you just enough fuel for a couple seconds of run time.

The fuel pump could also be failing.

Either way a fuel pressure check is the only way to rule out these as the culprits.

 

I sent mine off to be professionally cleaned, tested and flow balanced:
- http://www.4crawler.com/4x4/CheapTri...html#Injectors

 

Have you tested to see if the injectors are getting power when you turn the key ?

if you haven't already try this .




With the engine running or cranking, check each injector for normal operating noise (a buzzing or humming), which changes in proportion to engine rpm. If a sound scope is not available to you, check injector operation by touching each injector with your finger. It should be buzzing. If no sound or an unusual sound is heard, check the wiring connector, or have the injector checked professionally.

Measure injector resistance by unplugging the wiring connector from the injector, and connecting an ohmmeter. Check the continuity at both terminals; resistance should be:

* 1984-87 22R-E and 22R-TE: 1.5-3.0 ?.
* 1988 22R-E: 1.0-2.5 ?.
* 1988 22R-TE: 1.1-2.0 ?.
* 1988 3V-ZE: 1.1-2.2 ?.

 

I've tried to listen/feel for the injectors opening up...and from what I could tell, there was no noise or buzzing from them...but I don't know 100% if that's the case. I'm going to stop on my way home and try to find a sound scope to use. Also, I have a friend that has a '88...I think...that used to be the turbo model, but the engine was replaced to a normal 22rE...and I'm going to see if he'll let me use his computer to see if that's what's wrong with mine. Will that computer in my friend's truck work in mine? Other that that...I'm gonna do what ya'll have told me to try. Thanks again! I'll have updates later today.