Hello Again Loyal Ford owners ,
an
This is another problem that I have seen at work and on my own
99 Expy . It is a leak problem that i think is being overlooked by ford . Had a expy come in with misfire , customer complained of misfire after a rain storm and after washing the vehicle . He claims he would always keep the hood down when washing ,so I
went to work with the trusty garden hose . I have noticed this On
my expy too, occd run and assionally experiencing a misfire after washing and after a good rain . First step was to open the hood and let the garden hose run on the windshield and let run down into the wiper cowl . Lo and behold , we have a leak right thru the fire wall over the right bank (passenger side ) of the injectors and spark coils . There is a ground strap attached to the firewall and it has two locating slits that the water just pores out of and drips right down on #7 and #8 spark coils and in this case , allowed water to go into the plug , coil hole . Also one of the mounting bolts that hold the braket of wire plugs and looms also leaks . After disconnecting the ground strap , fill the holes with rtv and cut the little locating tang off the strap and remount . Put a little rtv on the bolt before tightening . On the other bolt , just remove the bolt and mush a little rtv in to the hole and retighten bolt back in . Run some more water on the windshield and check for leaks . I also checked my Expy and sure enough , same prblem . My truck has never run better since stopping this leak . Washed it several times since with no prblems anymore .This I believe is another source of the early coilpak failure on these motors . I have heard that the heater hose will also leak on the coilpak , but how many of those cases are really the leaky firewall problem ??? When you check yours , just run full garden hose with out a sprayer on the windshield and do not let it splash over the rubber hood seal , just let it run down the windshield naturally and you will see it start to leak . This is a major problem that has been undiscovered at the dealer , until now . This customer was told by the dealer that it had a bad coilpak , the third one for him , and it was the same one over and over . He refused this time and brought the truck to me . after checking , # 7 coilpak was fine , although it had a inch of water in it , Hmmmm, where did that come from . What does ford do , Just keep replacing coilpaks ???? Gonna check my friends F-150 this weekend and see if this problem extends to the truck series , bet it has the same problem . Good luck on this One and hope it helps you . Thanks for your time gentlemen !!!
Originally posted by bodinejcs I have heard that the heater hose will also leak on the coilpak , but how many of those cases are really the leaky firewall problem ???
I'm sure your firewall problem isn't an isolated incident, but there are plenty of documented issues with the heater hose leaking on #4 coil pack.
I'll go ahead and add this finding to my FAQ, if you don't mind...
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