#3 through #8 are fine. #1 & #2 need replaced.
When the impedence of the coil inside the injectors start to excessively wear, they no longer have the resistance required to keep them closed. Once the engine is up to operating temp the problem just compounds itself.
Required impedence for those style of injectors is from 12 - 16 ohms +/- .05
<BLOCKQUOTE>quote:</font><HR>First, sitting at a light idle in gear, with foot on brake (auto tranny), the idle will pickup, then drop off, then pick up again over and over between a range of about 1000 rpm<HR></BLOCKQUOTE>
What's happening is the injectors #1 & #2 aren't capable of holding the seat closed inside the injector, so they are dribbling more fuel than the engine is asking for. Because of this rich condition, the ECM compensates. This is the surging (or "hunting" as I call it) your feeling.
<BLOCKQUOTE>quote:</font><HR>If I give it gas it stops. If I let up on the gas it stops <HR></BLOCKQUOTE> When you give it gas, the engine requires more fuel. Since the dribbling injectors are already doing that, the problem goes away, until you go back to a steady condition. On de-cel, the fuel delivery won't be noticed unless somebody is behind you, then it's whewww.
RobR, I'm not to knowledgeable on TBI, but if it was happening to me, I would look for a vacuum leak.
67 Camaro LS6 454/TH400/12bolt 3.73
1989 TransAm 5.7L WS6 W/all the options