I'm seeking help. Last Sunday I was cleaning my '02 DII. I hosed a cold engine down with one of the name brand engine degreasers and followed its directions. After hosing it off intensely, I ran the engine to complete the drying process (I just let it idle). It seemed a little rough (barely noticeable), so I didn't think anything of it. I've done this before. After it idled a while, I went through the process of Sea Foaming it. I put one full can in a full tank of gas and went through the procedure of putting three quarters of another through the proper vacuum line in the intake. After it sat for about a half hour I started it and smoked the neighborhood. It still wasn't idling as smoothly as it did before all of this, but I ran it all through the RPM range for a good while and things seemed fine. When I got in it to drive it the next morning all hell broke loose. The idle felt rough as could be, and pulling away from a stop feels like the engine is trying to shake itself apart. I pulled it in the garage and changed the plugs (new Bosch +2's) and wires (Magnacore 7mm's). (Thanks to this site for the great instructions, by the way.) Anyway, nothing has changed. I just had the codes read, and they are as follows:

P1590
P0300
P0304
P1300
P0308
P0307
P0305

I read of another owner on here having a similar incident, but I never heard what happened after. I've lived with the Amigos for a while, but I need to take care of this. This truck has been pretty well-maintained. I do most of the work, but I am at a loss, here. Please help.

 

1590 is your 3 amigos and the others are misfires on 4, 8, 7 and 5.

 

the 1590 is a rough road fault that cuz your 3 amigos are on. the others are all misfire codes. why did you install 7mm, you should use 8mm magnecors. don't use degreaser on the engine unless you really need to and then onlu use a little bit. don't hose off intensely either use low pressure and cover your electrics under the bonnet. you need an ABS reader to figure out whats goin with the ABS system, as for the misfires i would start with a spray bottle of water and check the wires first. Also double check your routing on the wires. throwing codes after doing an induction cleaning is normal but you should be able to clear them and be OK. but it shouldnt be running as poorly as you described.

 

With a DII you should be able to powerwash the entire engine just fine, everything is waterproof and the coils are in the back of the engine. Check your wire routing, you may have a bad coil though.

 

I triple checked all of the wire routing from the wire job. They are going to the correct cylinders. The directions on the can of degreaser say to use a steady stream of water to fully hose off the engine. Also, I've done that to the Disco before, and it didn't do this those times. I've never had vehicle react like this. We Sea Foamed three other vehicles, then, too, and they all ran significantly better after the smoke break. I don't believe the problem is in the Sea Foaming, but that's just my thoughts. I believe this stems from the degreasing, but, again, I've never seen another vehicle respond this way.

 

I guess when I made my $1000 parts order from Atlantic British I didn't see that the Magnacores I ordered were only 7mm instead of 8. The list of parts was lengthy, and I probably overlooked it. 7mm wires inplace of 8mm shouldn't cause this, though, should it?

 

As for the sensor causing the 1590 code, that came from the wheel hub assembly being replaced some time back. I'll deal with that one once I can actually drive the truck again.

 

1590 turns on the ABS light and is part of the 3 amigos ABS error. Also it cannot be erased with a normal ODB scanner. You replaced a hub and the amigos came on?

As far as your misfires, I know you checked your routing but besides wires, coils or plugs not much else is going to cause the misfires. Did you make sure the wires clicked on the coils properly?

 

When I was putting the wires on the coil packs I had to sort of wriggle them around in there a bit to find just the spot. Then I would get two little/slight clicks, and they seemed to be seated at that point. they didn't "click" the same way as the other end did on the plugs, though. Has anyone ever heard of a coil pack going bad?

 

Yes, I replaced the left front wheel hub assembly when the wheel bearings died. After that surgery, the 3 amigos made their appearance. The stealership read that code and told me it was from the ABS sensor not being gapped correctly, most likely, when the new hub assembly went on. They erased whatever that deeply embedded code was (and all the others) but it came back pulling out of the parkinglot. They wanted my bank account and some blood to fix it, but I left.