acenase

I have a '93 SC400 with about 162,000 miles on it. and it's just running like crap. I'm scared to drive it.

When I start the car, it idles around 800 RPM, but once I put it in drive, it drops all the way to like 200 RPM... Look:



Yep, thats how low this car idles when in drive. I'm so scared to drive it. I almost died out on the road because it was idling so low. When I was at a stop it was at 200, and when I pressed the gas the car tugged and it felt like it turned off but I throttled it enough for it to rev up and change gears so it kept going.

Also, I hear this weird WHINING noise coming from the engine like my car has a blower. What could this be? A belt going bad perhaps?

I know my alternator can't be going bad because I started the car up and removed one of the battery terminal and the car still ran. Should I do an oil change? Is there a way I can adjust the idle with a screwdriver in the engine?

acenase

Bump..

ClubLexus doesn't have any ideas? I've cleaned the air filter and throttle body, cleaned around the throttle. Still the same. I drove it all around fine last night but I had to ease on the throttle while at a stop so it didn't jerk down to 0 RPM and die out. Any tutorial on how to adjust the IAC so it idles higher?

User1321989

iTrader: (1)

check out your TPS, MAF sensor, and any and all vacuum lines. spray some carb cleaner over the engine... if it revs up you have a vacuum leak someplace....

also check the condition of the spark plugs, wires, and coil....whichever you have..could also be a failing distributor......


try searching next time....

shajbot

iTrader: (3)

It may likely be the TPS. Search it up or if you already know how to adjust it, turn it clockwise just a little bit.

mkesc400

the same thing happend with my buddies vehicle. it was the MAF sensor.

acenase

Thanks guys ill check that out..

I tried to do a little searching as well.. but for the love of god i have no idea where the TPS screw is to turn clockwise to try that first... can you help me locate it?

I sprayed carb cleaner over the engine and didn't hear anything, so scratch that. also maybe it could be my MAF so if everything isn't normal after I adjust the TPS then I'll probably get a new MAF.

breakb

iTrader: (2)

https://www.clublexus.com/forums/per...-shifting.html

the thread to adjust the tps.

peace out

User1321989

iTrader: (1)

clean the maf before you shell out to buy a new one...or switch it out with a friend..