3.8l stalling when shifts!!!! 88 merc,.... Reply #15 – April 29, 2009, 11:23:55 PM Quote from: thunderjet302;269771Have you looked at the oil yet? If it looks like a milkshake it's the head gaskets.That was my first thought, or thermostat Quote Selected
3.8l stalling when shifts!!!! 88 merc,.... Reply #16 – April 30, 2009, 08:54:39 AM no milkshakes here guys,... sorry........ thats the first thing i looked into when i suspected the gaskets....i did the comp test, spark plugs, and t/s all at once two days ago,......flushing the coolant today, sooo ill get back at ya!!!! Quote Selected
3.8l stalling when shifts!!!! 88 merc,.... Reply #17 – April 30, 2009, 10:30:58 AM The good news is, if it does end up being the head gaskets, the oil will look delicious when you drain it. Quote Selected
3.8l stalling when shifts!!!! 88 merc,.... Reply #18 – April 30, 2009, 01:15:08 PM No, the good news is, replacing them will only take a day, but getting the time to have the car sit and be worked on, even for just that one day is imposssible......its providing 3 people with transport to work,...... and my xr7 hasnt even come apart yet..... Quote Selected
3.8l stalling when shifts!!!! 88 merc,.... Reply #19 – June 20, 2009, 12:15:43 PM UPDATE::::: the car has been fine for a while,..... Now the car stalls everytime it tries to shift from 1st to second, if i let off the gas pedal when it starts stalling, and very lghtly/slowly pump it, itll catch and stay running,...the car also stalls coming out of turns,......im going to replace the steering rack sensor, and then the IAC,......Reamember its a 3.8l ls cougar 160kAnyone think of other reasons this could happen???? Quote Selected
3.8l stalling when shifts!!!! 88 merc,.... Reply #20 – June 20, 2009, 02:40:15 PM Steering rack sensor? I call that the driver. What your describing sounds like a fuel supply issue. Quote Selected
3.8l stalling when shifts!!!! 88 merc,.... Reply #21 – June 20, 2009, 10:27:43 PM I just changed the pump, and filter,......sometimes the car will stall just by sittting in park at idle by turning the wheel left then right,...... i also noticed that a motor mount is broke....... shes gonna be pi$$ed!!!! Its just odd, its like when the car idels down to shift, it wants to completely cut out,........Can anyone tell me how to clean out the iac,...... maybe to see if the problem will be better????? Gonna go searchin now back in ten...... Quote Selected
3.8l stalling when shifts!!!! 88 merc,.... Reply #22 – June 20, 2009, 10:44:41 PM yeah nothing so far on cleaning the IAC..... Quote Selected
3.8l stalling when shifts!!!! 88 merc,.... Reply #23 – June 21, 2009, 02:46:18 AM Its real easy. Remove it from the side of the intake. And load it up with carb cleaner. Wack it on the work bench a few times to free up any crud.I take a little screw driver and make sure the little valve inside moves up and down freely. It should move in one direction only and whack down shut by itself. If you blow in one side it should let almost no air through (wait till the carb cleaner is gone). I have tested a few this way and it seems that some air is ok. I think the computer just learns how much to open the valve. The one from my mustang engine wont let any air through, while the one from the cougar lets a decent whistle. Both operate fine.I have had success removing the screws that holds the two halfs together. The bottom is just a solenoid and the top is just a valve. The last time I did it, I put a little light oil in the solenoid and soaked the upper half in carb cleaner. Be sure you put it back together clocked the right direction.Seems to me, the only way they really "fail" is if the solenoid winding blows. They are expensive as bawls too. Quote Selected
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