Engine idles and sputters below 1k..

[jae_rex]

I had this problem last summer and it turned out to be a large tear in the plastic tubing near the MAF. That was replaced along with the distributor and ingition coil. I have done a full tune up in the Fall, and today I am getting the same problems. I think there is a possible vaccum leak. But where would I start troubleshooting? I don't want to start replacing parts, but I did start with the fuel filter and upgraded to a 300Z fuel filter. That worked for one day. Now the problem is back. Any ideas?
Modified by jae_rex at 6:03 AM 3/10/2006

[lowviscosity]

I have the same problem happened last night twice. Once I start slowing down for a stop light when the engine isn't in gear it will sputter then lights will dim and it will shut off under 1K.

Only happend twice last night but i think this problem will re-occur. If someone could help it would be great.

[180fan]

A vac gauge tee'd into your FPR vac line. That will tell you if you're dealing with a vac problem. It could be injectors, your timing, plugs, or your iacv as well.