Help with wierd noise

[SupraSaver87]

Well it is kinda a noise, I was thinking it was spark plugs, so I replaced them, they are ones that DO NOT need to be gapped. Also I checked the spark plug wires (All 6), and that seemed to help once I started the car again, however I drove it for about 1 block before the problem started again. I don't really know what else to do....so I am asking for help.

Here is the problem:

I start the car in the morning, or basically if I let it sit for 2 hours or more, it will not give me this problem for about 1 block. The engine sounds like it is miss fireing, it litereally makes my car shake. Under anything more than what I would guess to be 25% throttle, this problem is bad, if I keep even throttle, at mostly any RPM, then it runs smoothly. I charged my battery two days ago, all night, and this morning, it was dead. This happens alot to me.

I have a 1100CCA battery that I am going to see if it holds a charge, and if it does, then I am going to use that one. But that probably won't mean anything as far as fixing the problem...but hey, the more info I give, the better help I can get.

I will try to explain best I can here.

The engine sounds like its sputtering, loss of power is DEFINATLY present during the sputtering. I will be rebuilding my altinator this weekend, but don't let that stop you from telling me about altinator problems. Lets see....It happens ALOT more the longer I am driving, also during idle, at night, I can noticably see my lights dimming slightly when idleing (My car idles at around 500RPM), also the interrior...well all my lights dim.

There is no white smoke, and the oil is not milky, I did an oil change last week.

SIDE NOTE: Alright guys, prepare to be amused, or horrified. My car, owned by two different people, has never had MAJOR work done to it. I am noticing that some parts on the car are just little el-cheepo parts as well. However, the two owners used the car like just a normal car, every day driver....but never did any up-keep things on the car. I could literally FEEL the grit in my oil, like it was bad, I honestly don't think that oil has been changed since at LEAST 7 years ago. Also that means ALL the fluids are probably 7+ years old. Don't worry though, I am on the fast track in replacing all fluids with premium fluids. I have a question though, where do I find the dip-stick for the tranny fluid, and how to I refill it? Ok well hopefully you arn't horrified on this...back to my problem.\

Ok, so we have sputtering, low amperage at 500-700 RPM, and frequent battery failure, no white smoke, under any type of throttle load, or %. (This is talking about load while driving the car, or under "clutch in" revs). Powerloss, and a side note that you should also know about is that I am pretty sure I have a boost leak. Oh yeah, assume all bolted on parts to be original.

I don't leak any fluids, well other than gas, front a rust hole in the gas tank downpipe, or maybe at the welds where the downpipe meets the tank.

Yeah, if you have any questions ontop of the info I provided, then PLEASE ask. I can provide pictures of things if need be, but I am not going to remove parts to get pictures.

[theWeezL]

Sounds to me like you have 2 seperate problems that seem to be related, but arent.

Im placing my bet right now on a bad alternator (specifically the regulator) and a boost leak/bad turbo.

Rebuild or replace your alternator. I really recommend just getting a new one or at least a reman., getting a kit and doing it yourself wont save much, and its my experience that rebuilds dont last very long before they go out again.

next thing you need to do is track down that boost leak. Im not a turbo guy, so I will defer to the resident experts in that area. You can get started by checking all your connections and hoses very carefully. If anything looks rotten replace it. while your doing this I recommend you look down inside your turbo at the fins. Check for damage there and report back.

[SupraSaver87]

I am going to buy the rebuilt kit, because its about $20 out here in canada. I am TRYING to track down that boost leak, but everything under my hood is covered in oil and crap....can I just flat out pressure wash my engine bay?

oh yeah....ALL my hoses are original....I basically just grade my hoses as HOW rotten are they....lol. I am doing a major hose replace session this saturday.

[theWeezL]

pressure wash is not recommended for the Supra. just way to many parts that dont like to get wet. I recommend you get yourself a couple cans of spray cleaner like Chemtool and a roll of paper "shop towels" and dig in.

[superpage1987]

I had the same problum (with the oily engine). What i found works best it get two or three cans of some stuff it is cald "gunk engine cleaner''. let the engine cool and just spray it down. use alot when you think you got it all spray more i used two cans and mine wasnt realy that bad. let it sit for 30 or 40 minute then rwash it off with a hose. do the exhust first then start the engine ant let it runn wile you finsh. try and kee away from wires and other eletricl stuff well good luck with the problum

[SupraSaver87]

thanks for the replies...however I think I will go more in depth on my problem. Again, I will include as much info as I know, with as in depth descriptions as possible as well.

First, a sputtering sound, each time I get that "sputter" it feels like my engine is working against me. It is less noticable at higher RPM's, I would say around 3,000RPM it starts to get easier.

NOTE: My turbo kicks in at 3,000RPM as well

So with that in mind, I'll keep going. When idling the car, it again makes those sputtering sounds, but it doesn't jolt my car the way the 800RPM - 2,500RPM range does.

I have replaced my spark plugs with irydium ones, they are gapless, so you don't have to gap them...or something like that. I know I don't have to gap them, and that is all I care about knowing from that package. The can tire "Specialists" <-------LOL!!! told me to use these ones.....so I hope they didn't screw up. Anyways....I replaced spark plugs 3 weeks ago, and it ran fine after everything was assembled again.

NOTE: I had to take the plastic cover off, then unbolt that vacume metal line....has four hoses connecting to it...anyways. I took off the ignition coils...or w\e those things are the plug wires connect to...and yeah, you guys probably know the drill.

So I really can't figure out what it is, and it seems to get worse the longer I drive it at one time...well it DOES get worse.

Stats:
Engine Temp: just under half
Oil Pressure: sits at 2 on the guage
Warning Lights: None (did the jumper thing, E1 and T, and got code 11)

I really don't know what is up....so yeah, help would be greatly apreciated!

One last thing...the problem has progressed to an almost constant thing already, It seriously feels like I am running off of 4-5 cylinders....I can't even spin the tires in first unless I were to try to rev up....but yeah, I would break my engine doing that most likely.

I have 225/50 on my supra rims, 16" rims.