Car - 1992 3000gt SL

Problem - Car wont stay on, it starts, then little by little the idle goes up and down until it finally just shuts off. When I drive it, it runs when I hit the gas, but it makes a loud clanky sound when I hit the gas. Then when I come to a stop the idle goes crazy again and it shuts off. Blows white smoke as well. I thought it was due to my power steering belt busting, but I replaced it and now the same issue.

Can anyone help?

not throwing a CEL??

anyway, check the MAS. Make sure its plugged in all the way. If it is, unplug it and see if that makes a difference. If it doesn't change with the MAS unplugged, you probably need a new one.

Hi blink,

Thank you for the reply. I haven't been able to check for the code (Check Engine light is on) because everywhere wants to charge me for it. I know I have to so I will prob just pay to see what codes are being thrown. Do you know where the MAS is located for my car? Or maybe a diagram so I can view it that way? Your help is soooo appreciated!!!

you could try this: http://www.stealth316.com/2-diagcodes91-93.htm

Where are you located? It's impossible to diagnose your car from the description you gave.

I am located in California. Let me see if I can clarify. I turn on the car and it fires right up. Well as the engin gets warmer the idle goes up and down in between 1 1/2 and 0 RMPs. Since it goes low when going up and down, it turns off. Well while it is idleing up and down it lets out white smoke out of the exhaust. So obviously when I hit the gas it doesnt shut off, but once im at a stop the idle goes up and down again and then shuts off once it has had enough (dies so to speak). When I press the gass, it makes a loud clanky noise, but doesnt make that noise if I dont press the gas. Please let me know if I can answer any questions you have that may help lead to the issue. I fear it is either a cracked head or maybe timing belt?

sounds more like rod knock. drain your oil and look for metallic residue (it should appear copper'ish looking). THat's bearing material.... means your engine is blown.

How long has this been going on? if it is rod knock, you will either throw a rod straight through the block/oil pan, making an ENORMOUS mess, or your engine will just seize up. Stop driving it now, and start saving up your pennies for a replacement engine.