92 SC300 (130k) NEED HELP with Problem
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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
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
Last edited by carlmatthe; 03-14-08 at 03:32 PM.
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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
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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![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
How many mpg are you averaging?
Jonny
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
![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
How many mpg are you averaging?
Jonny
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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?
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?
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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.
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.
Last edited by SMP142; 03-15-08 at 11:52 AM.