Hi guys i have an 87 TA 305 tbi 62K original... the car runs great.. when i'm at idle just standing at the back of the car i hear a smmoth idle then a stutter.. then idle then a stutter like a low pop not a backfire at all a low pop.. any ideas i was thinking tune up.. or bad plug.. anything. thanks

 

Hard to tell on the net, but I can give you some cheap ideas. 1st, Find a good dark place and start the car and check all your spark plug wires from boot to boot and see if they are arcing across each other. I use a foot long wood dowel rod so if they are, your finger won't get zapped like I have done too many times. You have to move them around a little! If they are ok, pull the dist cap off ( turn lights back on first LOL) and look inside and see if the inside has a lot of corrosion on the contacts, if so replace it and the rotor. Also, check for carbon tracks inside the cap. A new set of AC-Rapid fire plugs work real well. They might cost a little more but their worth it. I had one plug go bad on me once, and the comp. tries to compensate for that and fouls the other plugs on that side of the engine. The plugs on the other side still looked new. I had your problem once and new cap, rotor, wires and plugs cured the problem. If it doesn't , you could have a worn timing chain. That's another story! Good luck Like to hear what you found out.