finespunflesh

So after figuring out that my fuel pump resistor is not "resisting" I was looking online. I ordered from lexuspartsnow and they cancelled my order an hour later stating that they didn't have the part in stock. I then found it on lexus of south atlanta parts website but I called before ordering online, and the guy said that they don't make or supply that part anymore and that I'd have to find an aftermarket part through an oreillys, autozone, or advanced auto parts type store... Really not having any luck. Has anyone else had this issue and what did they use to replace their fuel pump resistor? I have a 1990 LS400...

I have a 90 LS400 with 190k and it was running great until... I was out running errands and it lurched up 200-300 rpm's and back down below 200-300 rpm's until it seemed like it was running out of gas and would almost die for approximately 4 seconds, the accelerator pedal wasn't really responding much, and then it would rev back up and limp my car ahead a bit more and then decelerate again for approximately 4 seconds and then rev back up for a couple blocks until it died a few times, I'd turn the car off, restart it, and eventually got it home. When I got it home I let it idle and it was revving itself up to 1000 rpms and then would drop suddenly, without me doing a thing, over and over until it eventually died out. So I replaced the fuel filter as I had a hard time going uphill the day before and I thought it might help, and it worked fine to the store and back. I had hoped that was all it needed, even though I replaced the filter and pump a year ago. Well today I took it out to the pharmacy and before I even got there it started doing the deceleration pattern again until it died and I eventually got it home, it dying sooner and sooner every time I restarted my car to just get it parked at home. I disconnected my battery for about half an hour and reconnected it. Now my car won't even start. It really sounds like it wants to and had no issue restarting throughout this entire problem, but it won't actually stay running at all now. This is identical to what happened last fall when the fuel pump went out. Is it common for a fuel pump to need replacement every year? I didn't think so, but what could be causing that to happen? The relay clicks and appears to be working and the engine and transmission are really great for a car that's as old as I am...

I went through this issue last year. Replaced my battery twice, replaced the seals and gaskets in my power steering pump, and finally replaced my alternator even thought it tested out alright. Turns out that the connection from my battery to the pack of fuses that sends power out to the rest of my car was old, overheaded and very corroded preventing the power from my battery to reach my alternator, even though both the battery and alternator were fine in the first place. I had an on-site repair guy fix it in a matter of minutes with a new wire bypassing the old connection. I had gone through months of my dash lights and all power flickering and draining my car over and over and leaving me stranded several times. Charging my battery over and over. It was awful but since that one little wire was replaced, my car stays charged and I haven't had any charging problems. It's been about 8-9 months I believe. I wish I could describe the pack that the battery was connected to that was corroded but it was right behind where the battery sits, and the only place the wire first leads to, but I'm pretty clueless when it comes to car stuff. Obviously. Trying to learn though, thanks to this forum ;)

Whoops. Typed up the super easy solution to my charging issue and it didn't post...and I can't delete this either so I'll repost tonight when I get to my home computer.

Almost junked and parted my LS400 out, and I'm sure glad I didn't!

WOW. I am having the exact, identical problem as "sheab" with my 1990 LS400 right now! I replaced all the seals in my power steering pump, since it had been leaking, and cleaned out the alternator with some brake cleaner. Took it to Oreilly's and the tested the alternator, and it worked fine they said. Got a new battery. And now my car flickers all the dash lights, and runs under 1000 rpms no matter how fast I try to go, and then slowly but surely a few miles later all the lights in the car flicker and it slows down and dies. I can't get it jumped by another car + jumper cables, because the battery is completely dead. I took the battery out and home after I got a ride, and charged it, and put it back in the car just to get it home. SO SICK OF THIS happening. When it's fully charged, the car runs SO WELL. I am hoping to get an on-site mechanic here to test the charging system, because I don't know what to do from here. "Sheab" let me know if you ever found a solution please :) Thanks for posting this!

It's done! Fixed and working better than ever! The Fargo Corwin Toyota dealership quoted $850 + tax to replace the water inlet pipe and o-ring under my intake manifold. I spent $100 on labor to an excellent on-site repair mechanic, he was quick and knowledgeable and I'm absolutely grateful for being able to finish the final steps in taking off the intake manifold. I started it on my own, and realized soon enough that I was in over my head, so after he took apart the entire intake manifold in 40 minutes, we saw that the o-ring was trashed and leaking, but the pipe was fine! So I went to my local O'Reilly auto parts store, ordered a new intake manifold gasket for $35.26 after tax, a new throttle body gasket for $3.52 after tax, and then to the hardware store for a new breather tube and o-rings, for $3.24 after tax, had some new coolant in the garage and also cleaned off the CRAZY amount of build-up on my throttle body, for a grand total of $142.02! It took an extra day for the throttle body gasket to get to the store, so the mechanic had to come back the next day, but I am so excited! There are no dash lights, steaming or smoking, sizzling, or leaks of any kind! All just a stupid little ring. So glad I didn't sell it!

Thank you both so much! I have the onsite repair guy coming in a couple hours...hopefully. It snowed over night for the first time this year, and my car is parked in the driveway so this will be even more fun that I had anticipated :cries: To curiousB...I don't think the leak is from the manifold itself either, if that's what you meant? Thanks for the idea about the dye though. But I supposed to get that running through my coolant system, I'd have to put my car back together and have it on?? Or will it run through the lines either way? ...sounds like a dumb question, but I really don't know.

Well, I have a class at 1 today, so I decided to try to take some things off while I had time. Got most of the plastic housing pieces off and I'm down to the injector connectors, which I've removed and covered the holes with some shop towels. Took two hours to take apart all that I've gotten done so far...but I'm really optimistic! Got hold of an on-site mechanic with really low labor rates that seems to know exactly what I've been explaining, so he might come by tonight to help take off the rest of the intake manifold. I'm pretty excited! Don't even mind that my knuckles and wrists are pretty much all skinned up haha. Really anxious to just get this out of the way, so I can know what the real damage is under the intake manifold. There isn't any leaking coolant anywhere else, but the drips under my car from the pool in the valley pan under the manifold...can't wait to see where that pool has accumulated from! :/ Attached the picture of what it looks like so far, after what I've taken off this morning...

I'm sure I could try, but I probably wouldn't get much for it, as it has the coolant leak. And then, I'd be without a car for a while which would be pretty inconvenient, because I don't have a lot of money for another car, so whatever other old car I could get would have it's own set of problems that I'd have to deal with anyway. So I feel like I should just suck it up and if I can fix this, I should try. Couldn't even sleep last night, so stressed about it. But the plan right now is to continue to remove the intake manifold, I guess, so I can get to the inlet water pipe and replace both o-rings and seals. Wish me luck! ;) might be CRAZY, but I don't feel like I have many other options at the moment.

Thanks for the reply! I could only hope it would be that easy, but the coolant leak drips a little farther back, underneath, out of a center hole in the bell housing of the torque converter I believe? ...there is also coolant pooled in a pan underneath the intake manifold, which is why I wanted to take it off in the first place. But it only drips underneath, in the center of my car towards about where the dash meets the glass. I was told over the phone that the Toyota dealership shop had pulled off the intake manifold, but they obviously haven't, everything is just as dusty and they weren't even sure of the problem, which is what I brought it in for...to have the professionals look at it and tell me what was wrong. They didn't even write the $850 estimate on my bill, and they put the diagnosis in "possible quotes." Which I suppose is fair, but not for $100, I could have guessed there was a leak somewhere under there too. Which I did exactly so. I just feel stuck. I had initially wanted to bring it into a Lexus dealership, but the nearest one is almost 300 miles away. I really almost want to just sell it, but it's kind of impossible to sell a perfectly good car...with a coolant leak included. Ugh.

1990 LS400. I don't want to remove the wrong things, because I'm already annoyed with this project as it is. I've replaced the seals in the power steering pump, removed the alternator to clean it from that leaky power steering pump, put in a new fuel pump and fuel filter, and I've changed transmission pan gaskets...I thought I could handle this but I'm at that point where I just want to punch my car in the face. I took it to a Toyota dealer yesterday and they quoted a "possible water inlet tube leak" and they would replace the tube and the o-ring for $850+. I go to school full time, and bartend on weekends. My income goes to rent and a phone bill and groceries. If the parts are less than $50 there is no way I want to pay a shop to do it. So it is now in my driveway again, leaking and parked. Has anyone else had this problem? I would just love an lexls.com style how to, on removing my intake manifold...crossing my fingers that someone will have an idea on what to pull first. Thank you!

Thank you!!