RJSUS Posted March 19, 2005 Report Share Posted March 19, 2005 Do coil packs either work or not or do they get weak.....I have some low end rpm problems.....Changed plugs...new oe wires..cleaned throttle body..cleaned egr...checked FPR..only code that shows is 300.... Thanx...Russ Link to comment Share on other sites More sharing options...
JimD Posted March 19, 2005 Report Share Posted March 19, 2005 The coil insulation can break down internally producing a return path that is 'easier' than firing a plug. Make sure all 4 control connectors on the ends of the ignition module are clean and tight. Not sure about this, but I believe crank position sensors can cause your problem also. Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
cdictas Posted March 19, 2005 Report Share Posted March 19, 2005 JimD, Take a mechanics stethoscope and listen to the coil packs. Suspect/weak coil packs - you should hear arcing. Good coil packs make no sound. I hope this helps, Chuck Link to comment Share on other sites More sharing options...
Phillip Posted March 20, 2005 Report Share Posted March 20, 2005 You may also want to swap the coil packs with known good ones. These coils are quite common and very easy to remove/install. This is a fairly easy diagnostic tool. Link to comment Share on other sites More sharing options...
RJSUS Posted March 20, 2005 Author Report Share Posted March 20, 2005 Thanx for the suggestions.....I'll give them a try Link to comment Share on other sites More sharing options...
Scotty Posted March 20, 2005 Report Share Posted March 20, 2005 JimD, Take a mechanics stethoscope and listen to the coil packs. Suspect/weak coil packs - you should hear arcing. Good coil packs make no sound. I hope this helps, Chuck This is really good to know that you can hear internal arching! Thanks Link to comment Share on other sites More sharing options...
JimD Posted March 20, 2005 Report Share Posted March 20, 2005 Russ: I decided to answer you here in case others can use the information. The crank position sensors (two) are mounted slightly above and slightly below the crank centerline behind the left, or front, exhaust manifold. I have a picture, but it is a large file and once you get in there, I don't think you will need it. Drop the oil filter and remove the filter adapter and drop it out of the cradle to get it completely out of your way. You will have enough room to get 1/4" drive tools up there to remove the sensors. Make a note of which connector goes on which sensor. There should be new O rings on your new crank sensors and I would also buy two new O rings for the oil filter adapter. Have fun.... Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
RJSUS Posted April 19, 2005 Author Report Share Posted April 19, 2005 if the crank sensors are giving me a problem wouldn't they throw a code?? Link to comment Share on other sites More sharing options...
PAUL T Posted April 19, 2005 Report Share Posted April 19, 2005 RJSUS, I had a coil breakdown over about 3-4 months. Idled and cruised fine but when you give it a little gas it would stumble, give her more gas and she run fine. Also no relevent codes really ever came up. This drove me nuts. Finally the coil started to fry and then smoked and then gave out completely. I would buy a good coil for about $45-50 bucks at the dealer and start swapping them out. There is a 1 in 4 chance you will find it the first time. Good Luck. PAUL T. Link to comment Share on other sites More sharing options...
RJSUS Posted April 19, 2005 Author Report Share Posted April 19, 2005 Thanks but did that already and that wasn't the culprit...I wish it would throw a code or 2 to see where to head next....If I had an injector problem would I get codes then? Next move is to pull the NEW OE plugs and NEW OE wires and check them out... Would a fuel filter give me all this grief? Thanx...Russ Link to comment Share on other sites More sharing options...
CaddyJohn Posted April 19, 2005 Report Share Posted April 19, 2005 driving a '93 STS - tuned at 85,000 and 180,000...also at 195,000 - changed the coil packs...now have 212,000...runs real good. also use Mobil 1 10w30 Link to comment Share on other sites More sharing options...
cdictas Posted April 19, 2005 Report Share Posted April 19, 2005 RJSUS, Better do a resistant check on each spark plug. I had this problem, it turned out I installed a brand new bad spark plug. Using an ohm meter measure the resistance from the spark plug tip to the electrode. The reading on a DVM should be a Meg ohm or greater. On a analog meter, the needle shouldn't move at all (appears to be open, which is good). My spark plug, which I kept as a remember of all the pain I went through measured 7000 ohms. Good luck, Chuck Link to comment Share on other sites More sharing options...
RJSUS Posted April 21, 2005 Author Report Share Posted April 21, 2005 Well CD....Turns out it was a BAD brand new plug as you suggested.....The #6 plug had carbon tracks and turned out it had a hairline crack that wasn't visible until I put it under a magnifying glass....Thanx much for all the input.. Smooth running as a CADDY should be again.. Thanx Russ Link to comment Share on other sites More sharing options...
Scotty Posted April 21, 2005 Report Share Posted April 21, 2005 Well CD....Turns out it was a BAD brand new plug as you suggested.....The #6 plug had carbon tracks and turned out it had a hairline crack that wasn't visible until I put it under a magnifying glass....Thanx much for all the input.. Smooth running as a CADDY should be again.. Thanx Russ Did you use dielectic <spelling? grease? Link to comment Share on other sites More sharing options...
RJSUS Posted April 21, 2005 Author Report Share Posted April 21, 2005 sure did.....even tho the wires come with some loaded in already, I still use it whenever changing plugs Russ Link to comment Share on other sites More sharing options...
Scotty Posted April 21, 2005 Report Share Posted April 21, 2005 sure did.....even tho the wires come with some loaded in already, I still use it whenever changing plugs Russ Here is what the manual says about it. Notice the carbon tracking statement, Mike Link to comment Share on other sites More sharing options...
RJSUS Posted April 22, 2005 Author Report Share Posted April 22, 2005 thanx mike Link to comment Share on other sites More sharing options...
Scotty Posted April 22, 2005 Report Share Posted April 22, 2005 No problem, I just learned this little known fact last week doing some bathroom reading of my manual! Link to comment Share on other sites More sharing options...
CadiKing Posted April 22, 2005 Report Share Posted April 22, 2005 ... I just learned this little known fact last week doing some bathroom reading of my manual! Scotty, You look so different in the bathroom! Somehow younger, yet more refined.... LOL LOL Link to comment Share on other sites More sharing options...
Scotty Posted April 22, 2005 Report Share Posted April 22, 2005 Yep that's me! We were getting personal laying on HOODS so I figured... I have been bored lately as you can see.. Link to comment Share on other sites More sharing options...
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