nissandude

Wuzzup yall, nice to meet ya. I'm gonna cut to the chase and tell you whats wrong with my brothers 1993 SC300. If he drives like he's driving Miss Daisy it is perfectly fine all the way to 100mph but if he gets hard on the throttle it stalls, engine still runing, and sounds and moves like all of a sudden he's pulling a house. He's changed plugs, cap, coil, throttle position sensor, all 6 injectors and checked for vacuum leaks and it still does it. He has Injen Intake, Sun Automotive Hyper Voltage System and a Tornado installed. Can somebody please help?

Ryeno

iTrader: (3)

I have no idea what your saying but the tornado is a scam and ruins your mpg. I have idea what the "Sun Automotive Hyper Voltage System" is but it also sounds like a scam. I would remove it.

Wangan_sc

Cool my first post.... but seriously a Tornado? That's just planning to break up and be sucked up...

nissandude

i know, i told him the same thing about the Tornado but he does a lot of long distance driving and he says it works. I forgot to mention the check engine light is not lit.

Ryeno

iTrader: (3)

If your brother doesnt care about his car you shouldnt either.

Something just tells me all the stuff he replaced were autozone brand parts and not oem denos parts.

msc300

tornado wow like extra 30 horses lol kidding

PecosBill

iTrader: (2)

I second that.
Did you have someone diagnose the check engine light?

Amini9

unless i read wrong, he said it wasnt lit..

TheMole

iTrader: (13)

Remove the tornado, then report back...

StiCk3

iTrader: (5)

Just because a check engine light is not on doesn't mean that there are codes stored in the car's ECU. Seeing it's OBDI get a paper clip and find the diagnostic port under the trunk/fuel door buttons. Find port E1 and TE1 and stick each end of the paper clip in those two ports. Turn the car to the ON position and look at the check engine light. It should be blinking. That should tell what codes are currently stored on the ECU and using the number of flashes you can determine what the code is.

ihiryu

iTrader: (7)

/\/\ agreed.

horent135

iTrader: (10)

sometimes the ecu could cut the fuel injected into the engine because i think US laws has made if u go to a certain speed, it cuts the fuel. I know cuz i had a 240, i went over like 100mph something, and it cut the fuel even tho the tach had much more mph on it.

TheMole

iTrader: (13)

Pull the tornado off as it seems like it is blocking the airflow when you open up the throttle. It is a simple test and takes like what 5 minutes to install/uninstall as advertised right lol. At least you would be able to disregard it if the car still stalls.

DRFT103

iTrader: (3)

I agree, it defiantly seams like a MAF problem.

if he's driving really easy on the throttle, he has the air to match the gas. but when he floors it, he doesn't have enough airflow to match so it bogs down

nissandude

I will take all of this to my bro and see what we can come up with. All parts have been on for at least a 9 or 10 months.