Stalling

[70spider]

The mystery that is Pesto continues . This is a first, while I was driving home from work everything was fine (famous last words) when I get into town I downed shift from 3rd to 2nd for a stop sign and put on the brakes and push in the clutch to stop and all of a sudden he cuts out. I coast to a stop, I try to restart he fires up fine, I drive a little way but he is very erratic, I slow and he cuts out again. I get home let him cool off a bit and check the plugs they all look good but for good measure I change them, still the same issue. Is it full delivery or ignition related?

[Exit98]

I once had similar symptoms. Would start and idle but when I attempted to drive away car stalled. Turned out the carb's primary jet had a piece of dirt blocking the orifice.

Got towed home. Figured it out finally when I started the car then manually advanced the carb linkage so that the secondary barrel opened up and the engine ran at high rpm. In other words once I got the second barrel opened the engine would race.

Pulled out the jet and cleaned it with air and a piece of wire. Saw the piece of dirt.

All fixed.

[76was124]

If it's not the carb, I think there is an idle switch on the older trans that keep the idle up between shifting, but since you are downshifting and get it into the lower gear, clutch in and then it stalls, I am not sure that would be it? Maybe others more knowledgeable can comment about the idle switch.

[70spider]

Ok, this is what is happening now. I warmed up the car my usaul way of holding down the gas pedal around 1800rpm until the temp gauge begins to climb then back down to 1200 rpm until he will hold an idle on his own. Today he warmed up fine but began to sputter after getting to temp, then I let the fuel off and he stalled. I started him back up and slowly reduced the rpm to find out when he starts to sputter, around 1800rpm and he stalls out @1400rpm. Could it be fuel filter issue? The carb is only a year old (6500 miles) I hate to think something is wrong with it.

Edit: just noticed while messing around with it, my timming belt seems to have to much play in it. Would this cause my isuue?

[70spider]

It turns out the culprit was a lose timing belt. Apparently the last time I put the belt on I didn't tighten the bearing retaining nut well enough. Last time I used a regular socket wrench. This time I used my torque wrench, I hope that does the trick. Well thanks for all the input, good stuff to know if I have a stalling problem in the future. Have a great day.