Curt Brubaker
Member
Ok...I'm baffled, and without my ST for the day until I can get back to the garage to take another look. It's an 01 4x4 automatic.
I had changed all but 2 of the spark plugs and wires (the 2 last on the pass. side) about 2 weeks ago, and finally got around to taking the wheel off to get the other two tonight. The truck was running fine before, just doing maintence since I had bought the truck and never changed (truck has 71k on it).
Now when I start it, it's semi rough but you have to listen for it. However, put it in drive, and it stumbles all over itself and has no power. I pull each new wire off the coil pack seeing if it makes a difference. The middle cylinder pass. side dumps the idle even more, the last plug (furthest back) makes no difference at all. Ok, maybe it's not on the wire or coil pack right. Check both, their fine. Check spark at the coil pack, it's good, check spark at the plug, it's the same, very nice spark. So I pull the new NGK plug out (standards, no iridium etc). and pull one of the other side plugs that was in and working fine, and put it in that cylinder, and swap to the other side (Easier to get to). Same issue, pull the plug wire and no change in idle. GREAT it should be the spark plug. So I grab one of the old plugs, put it back in, and the same situation happens. So for good measure, I change the other brand new plug to one of the old ones, and still no change.
I'm totally baffled, and I let the truck idle for a while, checking all other hoses, connections etc. I spray starter fluid on most of the vacuum lines I could find in case I bumped something, but to no avail. After it idles for about 2 minutes, the whole idle changes, and it almost is stalling out just sitting there. I can hear the intake "popping" a bit which it's never done before. Now it has thrown a code but I don't have a scanner yet (trying to get one tomorrow) to see what it tells me. I tapped the IAC with no change just for shits n giggles. I also did swap the two new wires to see just in case I mixed them up, but I had them right, it got a lot worse and stalled out when I swapped them.
Anyone have a clue? Totally retarded to change to plugs and wires and now I can't drive the damn thing.
Thanks guys!
-Curt
stranded in central PA.:angry:
I had changed all but 2 of the spark plugs and wires (the 2 last on the pass. side) about 2 weeks ago, and finally got around to taking the wheel off to get the other two tonight. The truck was running fine before, just doing maintence since I had bought the truck and never changed (truck has 71k on it).
Now when I start it, it's semi rough but you have to listen for it. However, put it in drive, and it stumbles all over itself and has no power. I pull each new wire off the coil pack seeing if it makes a difference. The middle cylinder pass. side dumps the idle even more, the last plug (furthest back) makes no difference at all. Ok, maybe it's not on the wire or coil pack right. Check both, their fine. Check spark at the coil pack, it's good, check spark at the plug, it's the same, very nice spark. So I pull the new NGK plug out (standards, no iridium etc). and pull one of the other side plugs that was in and working fine, and put it in that cylinder, and swap to the other side (Easier to get to). Same issue, pull the plug wire and no change in idle. GREAT it should be the spark plug. So I grab one of the old plugs, put it back in, and the same situation happens. So for good measure, I change the other brand new plug to one of the old ones, and still no change.
I'm totally baffled, and I let the truck idle for a while, checking all other hoses, connections etc. I spray starter fluid on most of the vacuum lines I could find in case I bumped something, but to no avail. After it idles for about 2 minutes, the whole idle changes, and it almost is stalling out just sitting there. I can hear the intake "popping" a bit which it's never done before. Now it has thrown a code but I don't have a scanner yet (trying to get one tomorrow) to see what it tells me. I tapped the IAC with no change just for shits n giggles. I also did swap the two new wires to see just in case I mixed them up, but I had them right, it got a lot worse and stalled out when I swapped them.
Anyone have a clue? Totally retarded to change to plugs and wires and now I can't drive the damn thing.
Thanks guys!
-Curt
stranded in central PA.:angry: