Fuel Injector Issues [SOLVED]

Re: Down to one cylinder, back up to three. Fuel injector is out

Thanks for the replies, but those last two aren't that useful ;-). So, any words of advice before I potentially blow my injector electronics? I guess if it does blow, having Supra injectors will let me do it in style .

Thanks,
Teran

 

Re: Down to one cylinder, back up to three. Fuel injector is out

There are no injectors at the moment, but the previous ones were stock Denso, as far as I can tell. I can double check the model number if it is important.

As far as I know, the electronics and pump are stock.

The fuel pressure regulator seems to be fine, but the hose was mildly damaged when I took out the injectors the first time. I managed to get it on with no leaks with a hose clamp. It seems to be fine, however after the injector cleaning and reinstall the car will take maybe 12 seconds to crank (presuming to get fuel in the system) after sitting for maybe a day. It's never done this before, but seems to run as it did before the cleaning for the most part.

I don't know how to test for vacuum leaks and can't tell if they are there. I wouldn't be surprised if I missed getting a hose on properly, but hopefully they are on right.

Unrelated issues? Don't think so except for the things said above. The car has green coolant in it if that matters or not, I've heard that Toyotas should only run on red as the green has silicates. When I took off the injectors the first time, the Phillips screw in the fuel pulsation dampener seemed to come out on its own, but it went back in just fine. The car was low on oil maybe 2k miles ago and got pretty hot at times, but I don't think anything was damaged (although I could be wrong).

I hope this makes sense, but let me know if there is anything else I can clarify. About what I've done since the last post though, I tested the new low resistance Supra injectors with a 10 Ohm resistor inline with them on the 9v battery and they still open just fine. I'll try to put the injectors in and then test them with gator clips connecting them (the wiring harnesses are different) with the 10 Ohm resistor in line. Since they seem to open with the resistor in line I know I won't blow anything if I test it, so I'm actually good to go for now. Advice is definitely appreciated though .

By the way, I found the gas tank drain plug in the st162 manual so I drained out the gas and will refill it when I get back working on the car.

Thanks,
Teran

 

Re: Down to one cylinder, back up to three. Fuel injector is out

Alright, I think I did it . I have just a couple non-crucial questions now. You can basically ignore what I've written before unless you see another problem of concern.

So, I installed the '91 Supra injectors today. I also filled it back up with gas, which was a bit of a pain (surprisingly to me). I also didn't have a new gasket for the tank, but it looks like it's holding okay. The wiring harness is different, so I couldn't go all out with 4 injectors at once, but I tested each injector individually using gator clips and a 10 Ohm resistor. And guess what? Each one cranked (as a single cylinder)! Back on the previous injectors, only #3 and #4 would crank alone, with #3 as the strongest. Even #2, the infamous problematic one for me, cranked just fine. #3 did seem weaker than on its own before (but no weaker than 1 or 2), but I'm not too concerned about it.

My only real concern is if putting the resistor inline will make the injectors weaker than the stock ones with a possible delay in opening the injector. Would it be possible to run it without resistors inline and not damage it (stock injectors are 13.8 Ohms, these are about 3)? Or do you think I won't need to worry at all about the injectors being delayed beyond stock?

Also, is there a way to crank the motor from the diagnostic plug? Referring to the one that you can put the car into the diagnostic mode to send out error codes on the check engine light. It would have been useful to be able to short some wires in the engine bay and crank it, but it's fine. I guess I could always hot wire it.

I'm actually kind of proud of myself . I had quite the thing going with my parent's CR-V jumping the Celica since the battery was getting low, doing it in the dark outside under a light, and replacing the injectors all on my own this time. This has been really rewarding and fun. Let's just hope I can fabricate up some adapters for those injectors tomorrow with my girlfriend, or do the exist premade? I need a male stock injector plug to female injector plug for the '91 Supra style. I think we can make them on our own just fine though.

Thanks,
Teran

 

Re: Down to one cylinder, back up to three. Fuel injector is out

IT WORKS! :-D

Yes it does ^_^. Thank you seank90 and everyone who encouraged me to keep trying, I'm so happy now. I got those Supra injectors on with resistors inline by splicing the wires, and the car as good as before, if not better. I think it's a little torqueyer now; I could hold 28mph in 5th on a fairly steep hill .

My plans for a new (as in replacement, not actually new) MR2, Corrado, or something have failed for now. My Celica is back in the game, hopefully for a while.

Now, to see if it lasts. The injectors look so wrong and ghetto I'd be ashamed to show someone under the good. But, '91 Supra injectors *do* work in 3S-GE's, I can definitely say that. I took some pictures, so hopefully maybe I'll get to post a how-to sometime. A how to on replacing injectors my (faster) way might be good, too. I wonder if my Celica is slightly faster than stock . The Supra injectors look a lot better designed and might disperse fuel better, or so I think.

Thank you all so much. I think I spent 15 hours on my car this past while, but even at a modest wage that wouldn't buy me another car. The learning alone was basically worth it.

Thank you,
Teran