Gensc300

My 94 gs300 is dumping excessive amount of gas after cruising for about an hr. Ive replaced ecu and distributor. What could cause the sparatic bucking and major gasoline dumpage?

Chopstick

1GSs are notorious for O2 sensor failures. Have you checked that?

Gensc300

No i have not. Ill check those next. Ive been tryin to narrow the issue down didnt think to check 02s thanks

Nixspeed

Most likely o2 or a cracked inlet pipe.

Gensc300

02s would also cause thr car not to start at all?!?! I know thatvmy plugs are drenched in gasoline. Its seems after the car has cooled down itll fire right up. Ima check 02s valve cover gasketd and spark plug tub seals. And now the that inlet pipe. Really apreciate thr hrlp. I lovr this car just kinda frustrated at yhe moment. Previous owners last service to the car was in 01 WTF!!!!! Dont get me wrong the car rides smooth once started. But after its warmed up, it starts hesitating and misfiring and shuts off due to what u guys stated above.

Gensc300

After further digging took the exhaust covers off!!! What do you knowNixspeed pure genius!!!!

Nixspeed

Well I meant the intake pipe but I'll take the love lol. A cracked manifold will cause lean/rich condition also. Good time for headers. Check the rubber pipe from the maf to the throttle body as well. Both my cars have cracked all the way around and still ran but very bad. I just taped them up with a lot of electrical tape. If you're dumping fuel your o2 sensors are bad by now anyway. Fix the cause then replace plugs and o2.

Gensc300

aye gotta give credit when its due haha!!! and roger that on the cause,wires and plugs aswell. thanks for the quick response guys.

Nixspeed

I try to help and quick. I'm very impatient at things like this plus I always assume people are standing by waiting to try any solution offered.

Hope you get it all dialed in soon. They are fun cars. Probably why I bought 2.

Gensc300

Haha two Gs's awesome!!!! I heard once u go lexus your not going to want any other car! Seems to be true. Ive had this lexus for a month only driven it maybe four times loved every bit of it confort and alittle get up and go power. Cant go wrong. Whats the planes for ur gs3s?

Nixspeed

I'm Doing full Aristo swap on one. Single turbo, lots of custom parts. Stop tech 14" 4 piston all around, 19s, LSD etc. Should be around 450whp by June. I'm getting all the body done next week. Aristo bumper, spoiler, Toyota rain guards. Both are pearl white. Not sure if I'll keep my other one after I finish. I have 12 cars and they're all projects.

I really like Lexus. I just bought my gf a RX300 and its really nice. What are your plans for yours?

Gensc300

Holly shiz, cant wait to see the progress on that aristo. 450 wheel would be very nice. What kinda torque do u think itll make?
Ohyea i plan on lowering it with sc300 tocikco blue struts on maybe agx springs(not sure on the springs) im also gonna run 19s wana build a turbo kits from scratch hopefully everything goes to plan. Theres a salvage yard here in dallas tx that has atleast four or 4 2jzge motors i plan on building one from block to head. I think they were asking 300 bucks for the whole motors out there.

Nixspeed

Nice plans. I'm about to make a post on my aristo swap now. I was gonna wait but I think it needs to be out there.

Not sure on tq numbers but should be around 450 as well and pretty low rpm. I'm running s gt3071 with 4" inlet and t4 turbine housing which should spool fairly quick on a 2j.

Gensc300

Nice that turbo should spool very fast. Desent size aswell!!! I cant remember what exhaust size housing is on that one. .63 maybe not sure. And yes i think its def. Time to put that biuld up.

Nixspeed

Its s 1.08 if I remember right. Its big which sux. I had the same turbo on my mr2 with the t3 .68 housing and it was more fitting for a 2.0.

Let me know if you can't find a decent 2jzge. I'll have mine for sale soon. Its got 166k and runs good.