09-18-2014, 10:25 PM
topic intermittent idle controls.
and gross , idle slow speeds.
why is coolant at 169F, this is wrong.
is it in closed loop? if not the LTFT means nothing. but if it is in closed loop that LTFT is very very perfect. -3% percent,
the 200 idle is the egr main sticking open. at idle.
top contender. some valves (main) defy cleaning, and still stick at every other stop signal.
before the EGR was dead. now that you fixed it (elect, vacuum and exh paths fixed) , it now for the first time in years, the main must close every time. you stop,. it cant because it sticks..
the EGR main is part that is a tune up part, in that no EGR lasts for life of engine, so is not throwing parts.
"Does an inconsistently dropping RPM during the warm up cycle
or hot engine eliminate the Idle Speed Control?
Not sure if there is a differentiation between a consistently dropping rpm and an intermittently dropping rpm." ? I dont know.
but you can test these out each
Unplug the EGR main hose ,or more easy, the top of egr TB nipple. the put a short tube on the nipple with a screw in the end (no vacuum leaks allowed)
now reach back, and push the egr man closed, did it close? good
now drive, its fixed now, right, no more idle loss.
island kits: for sure old cars are very hard to stock up on parts, as some parts fail randomly,
but here is list
all tuneup parts.
ISC maybe, but never seen one i could not clean and make work.
EGR, (if killing it is not an option, but you might need a new one in 100k more miles?)
IAC, are not sold new. great idea is to get a whole used, TB> for sure.
brake shoes, and pads
belts.
PCV valve, very cheap.
i dont think your ISC is failing, but it can be cleaned easy. soak it overnight in carb cleaner, submerged. (hose blocked, and tilted so it holds the cleaner)
its not stalling for AFR reasons, so says the scan tool.
so that leaves the EGR.
can i presume this a fail failure of idle
never cold !
only warm above 150F (IAC closes and iSC gets the full job NOW)
and hot?
the ECU has staGES, SO....
Does it fail as stop signings,? i dont when and or what conditions of engine heat or moving car.
and gross , idle slow speeds.
why is coolant at 169F, this is wrong.
is it in closed loop? if not the LTFT means nothing. but if it is in closed loop that LTFT is very very perfect. -3% percent,
the 200 idle is the egr main sticking open. at idle.
top contender. some valves (main) defy cleaning, and still stick at every other stop signal.
before the EGR was dead. now that you fixed it (elect, vacuum and exh paths fixed) , it now for the first time in years, the main must close every time. you stop,. it cant because it sticks..
the EGR main is part that is a tune up part, in that no EGR lasts for life of engine, so is not throwing parts.
"Does an inconsistently dropping RPM during the warm up cycle
or hot engine eliminate the Idle Speed Control?
Not sure if there is a differentiation between a consistently dropping rpm and an intermittently dropping rpm." ? I dont know.
but you can test these out each
Unplug the EGR main hose ,or more easy, the top of egr TB nipple. the put a short tube on the nipple with a screw in the end (no vacuum leaks allowed)
now reach back, and push the egr man closed, did it close? good
now drive, its fixed now, right, no more idle loss.
island kits: for sure old cars are very hard to stock up on parts, as some parts fail randomly,
but here is list
all tuneup parts.
ISC maybe, but never seen one i could not clean and make work.
EGR, (if killing it is not an option, but you might need a new one in 100k more miles?)
IAC, are not sold new. great idea is to get a whole used, TB> for sure.
brake shoes, and pads
belts.
PCV valve, very cheap.
i dont think your ISC is failing, but it can be cleaned easy. soak it overnight in carb cleaner, submerged. (hose blocked, and tilted so it holds the cleaner)
its not stalling for AFR reasons, so says the scan tool.
so that leaves the EGR.
can i presume this a fail failure of idle
never cold !
only warm above 150F (IAC closes and iSC gets the full job NOW)
and hot?
the ECU has staGES, SO....
Does it fail as stop signings,? i dont when and or what conditions of engine heat or moving car.
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