John Take a look at the "IS Relay" circuit board. In our case, the power transistor was burned so I replaced it and it works fine. Look at the board where the transistor is mounted. If it is discolored a dark brown/black then chances are it is the transistor thats bad. I can't remember if it was PNP or NPN but if you take it to a shop, they can tell you what you need. Good luck Larry John Rodgers wrote: > How do I trouble shoot the Idle Stabilizer System? > > The Idle Stabilizer System on my 88 GL causes the engine to run in a > jerking fashion. When I disconncted the ISV (idle stabilizer valve) the > jerking stops. Re-seating the ISC (idle stabilizer control) - behind the > right rear tail-light did nothing, nor did cleaning the ISV thoroughly. > Consequently I have been running with the ISV disconnected, but I really > want to connect it back up since 1) it stabilizes the engine on cold > starts, 2) boosts the rpm when the power steering limit switch kicks in > and prevents the engine from stalling when I turn a corner, 3) boosts > the rpm to prevent the engine from stalling when the A/C kicks in. > > All input on this will be much appreciated. > > Thanks, > > John Rodgers > 88 GL Driver |
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