Hi, just recently changed my spark plugs and since I did my car shakes and shudders on take off before it warms up. Before I changed the plugs I didn't have any problems. I made sure the leading and trailing are in the right places and that the wires are plugged in nice and snug. Any ideas?

Well, spark plugs are known to go bad, and I suppose it's possible for a new one to be bad, but I'm more inclined to think that either something isn't right with the way they're hooked up or that you might have accidentally pulled a vacuum hose loose somewhere. What kind of shape are the plug wires in?



I assume you've got the right plugs? NGK BUR7EQ Leading and BUR9EQ Trailing. I wouldn't bother with any other plug, although I did run Denso's in my RX-2 a looooong time ago.

Yea, I got the ngk's. My plug wires are in excellent shape. I can't figure it out. And if it was the wires, wouldn't it do it after the car had warmed up too?

Its not the plugs because they would suck cold or hot. Like 98Redt2 said check for a vacuum leak and check around your throttle body to make sure you didn't mess up any the hoses or cables around there. You might have knocked your cable or vacuum connected to your AWS and thats why is sucks at start-up.