My wife has a 2000 EB Expy, 48,000 miles. Lately she's been telling me that the trucks been "chugging" when going down the highway. So I took it out for a ride and sure enough at a steady speed of 60 or so the darn thing starts to buck a little. We just recently had the trans fluid changed and I'm getting a little worried. It kind of feels like the engine is missing. When the coil packs start to go what are the symptoms? Has anybody else had this happen to them? Thanks.

 

Does the check engine light turn on? Try cleaning the IAC and see if that helps any.

 

Same situation that you were in I am now in. Did you find an answer to your coil pack issue? If so Please post.

 

Just made a repair for a customer on 2000 4.6, 60K miles, doing the same thing. It was not missing often enough to set a trouble code but you could feel it when you drove the truck. Replaced all the coils on one side (drivers) and problem went away. I saved the old coils and ran resistance test on them but was unable to determine the good from the bad. The dealership was going to replace them all. For about $800.

Still trying to develope a method for checking those things........

 

Is it difficult to replace a coil pack? I'm told that my #1 needs replaced. Similar issues only my "chugging" gets really bad. Seems to run better in the cold weather though. Hmmmm.....

 

I had similar symptoms with my 98 XLT, and it was one of the coil packs. I had the dealer replace it, so I can't speak to the difficulty.

 

I guess I'll find out this Friday if it's a coil pack or not. The symptoms came and went and finally this morning the service engine soon light came on. Mama's not too happy and I can't wait to see what this is going to cost me. I'll let you all know as soon as I find out.

 

It's really not tough - locate the coil pack, remove the electrical connector, take out the bolt holding the coil pack down (I believe it's 7mm), twist and pull the coil pack out. Throw some dielectric grease into the boot of the new one, and push it back down in there while turning a bit. There is no positive "click" or anything, it just sort of goes in there (I don't care much for the system, personally). Reattach the bolt and the connector and you're in business.

Should'nt take more than 20 minutes - and that's going along real slow.

XXL

 

Thanks Matt!

 

I had similar problems from a sticky EGR valve... might try cleaning that guy.

Tom

 

Also be sure new coil pack has spring inside of boot. On some cylinders you may want to remove electrical connector from injector and turn injector out of the way. Gently wiggle injector back and forth until it moves freely.

 

Well, It was a coil going bad. Number 2 cylinder coil and plug replaced, $230.00 lighter in the wallet. Mama's happy, says it runs like a champ. Maybe I'll get lucky later. Have a good weekend guys.

 

Did you take it to dealership or did you do it yourself. If you did it yourself how did you diagnose which coil was bad?

 

The missus took it to the dealership. They plugged it in to their computer and it spit out the culprit. I do think I'll be buying a SCMT for this rig soon, I've got one for my truck and it reads the OBD II codes. I'll kill 2 birds with one stone, a little more power for the missus and a good diagnostic tool for me.

 

The packs are a !ell of a lot cheaper at Advanced Auto or maybe other parts stores, or E-bay...
BUT without the right equip. it's trial and error....