Return To Idle Problem Options

[914Bryan]

Howdy, Im going to throw a bunch at you all at once.

I have just started to experience a return to idle problem with my 74 2.0 Djet. It runs ok, but when I stop and the engine returns to idle, it nearly dies. If it does stay running, the idle is surging.

I have experimented with just pushing in the clutch and not downshifting and the engine nearly dies. Even if I downshift to gradually bring down the rpm, once it is in the idle range, it starts surging and nearly dies.

I just reciently installed a new flywheel, clutch and pressure plate and adjusted the valves and did an oil change, but doubt that any of that would be a problem. But as an interesting side note, I did not weigh the new replacement flywheel; I know the one it replaced was a lightened unit. I have now noticed that the motor feels sluggish and does not rev as quickly as it did with the old lightened flywheel.

Do you think that now it is spinning a heaver flywheel it is exposing a problem that a light flywheel covered-up?

Any ideas where to start?

[76-914]

We're not throwing you to the Wolve's Bryan. Dave is right about reading that link. I've re-read and perused that thing 50 times. At first you might be overwhelmed but it falls in place. You'll find that lean idle (or hunting) is a lean condition as Cabinetmaker mentions. If enriching the mixture doesn't help info for testing the TPS is there and quite simple to do with an ohm meter. ALL vacuum hoses must have air tight connections. If in doubt hose clamp it for now. Go to the site and look at all the D Jet components connected to vacuum. You can disconnect and plug all of these components except for the MPS (the one behind the battery with a 4prong conn and 10mm? vac line) and the car will run. If that corrects your idle hunting begin by adding one component at a time until problem returns then you've solved it.