Valve cover gaskets were both replaced, all coils replaced, spark plugs replaced, but when you want to accelerate at about 45-50 mph, the traction control light comes on and it stalls, the needle falls even though you're still giving it gas. If you stop fully, it will accelerate again, but have the same problem especially if you accelerate too fast. We are yet to get codes on it. Any thoughts?
Problem solved. Recently we put newer tires on the rear which are a lower profile than the front. Don't ask. The point is, aside from the typical oil leaking into the plugs problem, the problem was caused by the rear wheels spinning faster than the front once at the higher speed. Traction control turns off the fuel injection. All is fine now that the front and rear are switched.
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the coils act as the gasket but the valve covers can leak oil into the chamber for the sparkplugs and give driveability problems. there are gaskets for the valve covers that can correct this if you have oil in there. yes thye sparkplugs are in those recesses
You are right about the valve cover gaskets. The gaskets fail and oil fills the sparkplug wells with oil. The rubber boots get oil soaked causing the spark to short out which causes the coils to go bad. The only fix is to replace the gaskets. I replaced the gaskets and the COPS(coil on plugs) over a year ago, and haven't had anymore problems with the coils. I bought the valve cover gaskets from the local Ford-Lincoln dealer. Lincoln up graded the gaskets in late 2002, and from what I have heard, they are the best you can buy.. I bought all 8 COPS on a popular online auction from a seller with excellent feedback, and saved quite a bit of money. You should replace any COP that has oil on it. I replaced all of them so I wouldn't have to do it again! It took about an hour to install the gaskets and COPS.Make sure that you get all of the oil out of the sparkplug wells. I also replaced the sparkplugs.
Leaking spark plug well seals are a pretty common issue on the 2000-2002 LS's.
Since that coil is near the firewall, it could be moisture due to the location
of the cowl and possible lack of sealant on the coil covers, but that would be
very intermittant as the heat of the head would boil off the water after driving
post-rain or car washes. If you find oil on the coil(s), you will want to
consider replacing the valve cover gaskets and at least that particular coil.
You may find replacing the valve cover gaskets on the V8 to be easier than the
thermostat. so if the voltage is low! check the coils out. they may need changing. Remove the plastic engine cover that covers the valve covers and ignition coils by turning the four quick-disconnect fasteners, located in the corners of the cover, using a screwdriver. Lift the cover up and off the engine. Lay the cover aside. Remove the electrical connector from the coil by pinching the pocking tab with your thumb and index finger as you slide the connector off the coil. Remove the 7 mm retaining screw that attaches the coil to the valve cover. Lift the coil out of the valve cover by twisting the coil as you pull off the spark plug and valve cover. Replace the spark plug at this time if you are performing a tune-up in addition to a coil replacement. this is for a 2001, but the procedures are the same. from 2000 to 2004. GOOD-DAY !
Check the COP(coil on plugs) boots. The 2000 and 2001 LS are known for oil soaked cop boots. The valve cover gaskets used on these years become brittle and crack which lets motor oil seep into the spark plug wells. The wells fill up with oil which soaks the boots that connect the spark plug with the coil causing the spark to jump before it gets to the plug.If not fixed it can cause the coil to short out.
I had the same starting problem on my 2001 LS. Then I noticed smoke comming from behind the right side valve cover. Then a few weeks later the engine started to miss. It's a good idea to check this and fix it early.
Most likely what has happened is that when the thermostat went out the engine over heated and the seal of the valve gaskets to the plastic valve covers got warped and you ahve oil the has dumped into the coil pack area and it has caused 1 or more of the coil packs to go bad as solution #1 has explained. get the gaskets replaced, it sounds like your husband is handy. Its not a difficult procedure just a little time consuming. research the coil packs because at the dealership they are very expensive. People have had alot of good luck buying them on ebay.
It is on the Driver side of engine in between the COP's (Coil on plugs) simply unplug the wire use a 19 or 3/4 deep well socket and unscrew it and put it new one... The whole process should only take 10-15 minutes.