Hey guys! Went yesterday and picked up a 1999 black gs300 with original 123k miles for $2k. Car drove great on test drive. Once (we went with my buddy to buy it since I already have a gs300 and is300) we left the guys house made it less then a mile down the road the power cut down and engine light came on. He was freaking out lol. We pulled into autozone and bought a MAF. Put her in and fixed it. I did notice the MAF plug in the clip was broken and the one on the vvti clip was broken to. We were 2:20mins from home and it's 9pm by the way lol. Does not sound bad but we are both 17😂 We went to go eat was still doing great. We left I was getting onto the high way and all of a sudden if I gave it half throttle it did nothing and started to bog if I pushed it to the floor it started to go. And 25% throttle is no problem either. What do yall think it is? 02 sensor? Got off highway to get gas and the engine light came on and again now throttle and then the idle was stuck at 1300rpms and would not go down. So we shut the car off unplugged the MAF plugged it back in and was good to go every 35 mins we had to do this! Any ideas would be awesome!

My brother has a 97 supra that's how I fell in love with the 2jz and I want my buddy to love his too!

 

Duralast can’t make a MAF to save their lives. Or any other electrical component for that matter. I’d get a better MAF and if that works, return the Autozone junk as defective. At at least Delphi or something

 

You think so? Even though it's new lol? I'll give it a shot what brand do you think? Just get one online?

 

Could be MAF, OCV, or your fuel pump is going out. Sounds like low fuel pressure to me. A tell tale sign is you are cruising on the freeway at a set speed and the car just starts bogging down. Happened to me.

What was your tank reading before you got gas? Also, scan the code and let us know what you find.

 

Can you remind me what the ocv is? Lmao at 80mph crussing with about 20% throttle it does not feel like it is cutting out but if I go about 50% throttle it just cuts out but if I keep pushing to full throttle it kicks in😅 and the fuel range was at 1/4 tank we drove it tell the fuel light came on then put half of a tank of 93. I'll see if she's throwing any codes tomorrow.

 

Check that accelerator position thingy that motors the throttle. The one the ex cable attaches to. Or the pedal position sensor.
Bit most importamtly chk the codes so u less likely to be guessing.

 

OCV is your oil control valve. Sometimes that can interfere but since you mentioned when you adjust the throttle it starts to accelerate, I think it's a fuel delivery issue. Generally when the fuel pump starts to go you'll find it acts sluggish the lower the tank is. When it's full you may hardly have any symptoms. Then as you drop below 1/3 tank the car will start to act up. Of course scan the code that will give us a better idea of what is going on. It could also be a vacuum leak.

 

OK so checked the codes it still had the previous p0100, p0110, p1121 I cleared them changed the oil and went for a drive. Again when at half throttle it does not feel like there is no fuel.. The throttle it self actually pushing back into your foot. I checked the tbs and I could not get a reading weird.... Correct me if I'm wrong but I believe that it's supposed to be. .65 ohms.. So I'm going to pick up a new one if it does not change I'll just take it back any other thoughts? Also the vacumm like that connects to the back of the intake and plugs into the top of the valve cover in the back was completely dry rotted all the other vacumm likes looks fine..

 

I found this sounds exactly like the problem you're having:
https://www.clublexus.com/forums/per...ng-help-2.html

 

Youtube p1121

The part yhat yhe cable connects to gets cold soldered.



PREVIEW
6:58
How to repair Accelerator Pedal Position Sensor on Lexus vehicles with ETCS-i ...
YouTube · Luxious Automotive
Apr 27, 2018

https://youtu.be/LRUd1WWTKs8



https://www.google.com/url?sa=t&sour...N8ZFOD4xbU2nov

 

Whatched the YouTube video and read the forum link. I put the new tps in now I'm getting a p1128 which is a pcm I believe so what do I do now? Do a ecm restart or buy a new pcm?

 

Ideas? Anyone there?

 

Take a look at this thread:
https://www.clublexus.com/forums/gs-...8-bad-tps.html

 

OK read the forum. This is exactly what happened today.. Yesterday car was starting perfect and driving good except for the half throttle. So we bought a new tps put it in still have the problem put the old one back in and called it a day. That was yesterday. Today went to start the car and would not run. Looking back I never unplugged the battery when I unplugged the tps twice and MAF. Could this be a problem? Possibly could have blown a fuse? Was getting the code p0121 saying it was a code A connted to the ecu! So

 

Update: just went and checked the efi fuse and it was not blown🤔 so that sucks what could it be?