the gold2 Posted May 18, 2017 Report Share Posted May 18, 2017 OldCadTech and BodybyFisher, I ordered the standard motor products SA4 (not economy type-SA4T) before I saw OldCadTech's comment on the Walker unit. They ran about the same price and the Standard Products comes with the plunger installed by the looks of the picture, same as Walker. The bracket does not matter since I have two for the Eldo application. Its the same Std. Prod. ISC offered by rockauto but this one had free shipping. The application list was correct for the 92 Eldo Touring 4.9 engine. Anyway, I determined that both jumper harnesses were good. So that eliminated the harness variable and possible lack of 12v power. I have not touched the idle-air adjustment at all and coincidentally, about three days ago, the car ran excellent over several run and park- starts and stops- all day. This was with the original ISC motor (not the junkyard one) and all other original settings and TPS unit. That was a fluke, because the next day(s) it was stuck at high idle,including today. This leads me to think that I should not touch the idle air screw. I can disconnect the battery and reconnect in order to force a zero setting and do an idle learn as needed after installing the new ISC. I also did the 'palm rap' test twice before I removed the ISC for testing the harnesses etc.. The PCM passed as it absolutely did not cause any variance or interruption of the (high) idle. Using the ignition on (engine off) and ignition off procedure, The junkyard ISC motor did run and ratcheted-plunger did not move-only jiggled, after the ignition was shut off. This was true under both jumper harnesses. The original ISC unit was dead under both jumper harness tests. Later I did a post-mortem on the original ISC and found nothing wrong inside- same as the first time I opened her up for a clean and lube. I then placed a 9 volt battery onto the motor electrical leads and it was stone dead. I did not try that with the junkyard ISC because it was in the garage. (lazy me). So, I hope to be successful after installing the new Standard Products ISC. Only thing I am aware of is to make sure the plunger is exactly the same length as the other two ISC units I have that measured the same. That would be my standard measurement. Any tips would be appreciated so I don't make some silly oversight. I also am assuming the original TPS unit is OK as it stands. I have spares and have read about how to install and leave loose in order to set, but I don't quite understand the underlying mechanics with this thing in order to get brave with it. That TPS comes off easy enough but its installing and correctly calibrating that might get CRAZY ! Thank you ! Arriving May 23 - May 25 Standard Motor Products SA4 Idle Speed Control Sold by: bestdealautoparts $50.48 Quote Link to comment Share on other sites More sharing options...
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