carlmatthe

Hey guys I have an occuring problem that I can't seem to fix. My SC300(92) with 130k has been smoking out of the exhaust for a while now. I thought the original problem was with my ECU, but I just don't know anymore. The car is not burning any oil and the gas mileage is good. It is also not leaking any coolant and the car doesn't overheat at all. Below is a list of my problems:
1 Battery dies often (went through 3 batteries in 2 months)
2 Car sputters and smokes extremely bad when engine warms up.
3 No check engine light comes on at all.
4 Color of smoke (white w/ bluish tint) real rich smell.

These are just a few of the problems that is keeping my car from running.
So far the only MODS I have done is an Injen Intake and a JIC Magic exhaust system. The car idles at 1500 when first crank up. When she warms up she goes down to 8 then starts to smoke and smell of a unburnt fuel. I have been to mechanics and they tell me the ECU is the problem. Other mechanics say that I have a clog in my catalytic converter. I just don't know. Please help. Any advice would be greatful

RyanV

iTrader: (9)

Does it use up coolant? How much fluid is in the radiator?

carlmatthe

Not at all. It doesn't use up any coolant. I changed the coolant 4 months ago and the radiator is still full. Do you think the ECU is the problem? I can't figure it out

SC4_FI

when you turn on the car, does the CEL come on? if not, i bet the bulb is dead, and thats why it isnt on while the car is running

carlmatthe

Yeah thats the weird thing about it. The CEL stills comes on when I crank up. I'm stumped yall

breakb

iTrader: (2)

my car idles at 8 or even a lil bit lower sometimes and it seems fine...headgasket....? >_< idk.

Peace out

carlmatthe

Yeah I thought it was the head gasket also. I replaced headgasket 2 months ago.

carlmatthe

Does anybody have any idea on the problem with my SC300? All the help I get will be greatly appreciated

Dx3

iTrader: (13)

Do you still have your old intake? If so I would put that back on and see if it helps.

Sounds like a BHG but if you are not overheating it probably isn't. How does your oil look?

If your ECU is bad it could be giving too much gas.

If it were me I would:

1. Replace intake back to stock intake.
2. Reset ECU.
3. Replace ECU OR
4. Hook up to a wideband and see how rich you are running.
5. If you are running rich buy an SAFC and fix your problem and gain a couple more HP

How many mpg are you averaging?

Jonny

carlmatthe

Thank you for the help. I really don't know if my ECU is bad but when i bought the car. I took my car to a mechanic and he said that it came with a rebuilt ECU. He said that it was still good. That was two years ago.

To answer your questions. I get about 16 mpg. I don't have my old stock intake any longer. When i installed the new one, (Injen Intake) I gave the stock one to my buddy. The intake has been on for 2 years now. I change the filter every 3 months with the same filter that came with the intake from Injen.

I tried resetting the ECU with no results. Do you think it may be a Fuel Pump issue?

carlmatthe

I'm sorry I'm a newby. Whats a BHG?

carlmatthe

My oil has about 1800 miles on it and it appears to be clean. Not dark at all.

Dx3

iTrader: (13)

Personally, no I don't think it is.

Blown Headgasket

Most of the time, a blown headgasket will lead to a milky substance in the oil. So between not overheating and good oil I think you can rule out a BHG.

Jonny

carlmatthe

Man. So what do you think the problem is? I'm thinking the ECU and MAF. I'm not for sure.

SMP142

mine did this when the MAF was bad. but i got nothing close to good mileage out of it lol. have you always got 16mpg? i get around 20.
i would say the battery issue is something completely different. sounds like your alternator is bad to me. of you might have a short/ground somewhere.