So as some of you know I've been having issues with my truck lately, and still have got nothing figured out. A little background... truck went in about 2.5k miles ago and had ARP's put in under warranty as well as one new head because of what I was originally told was warpage, but after talking to the tech he said it looked "corroded" around one of the valve seals. Truck has more or less puked coolant since I've owned it. After headstud install truck puked on the way home with Xtreme Street on. After the drive home it didn't do it anymore and I wrote it off to overfilling the coolant. Well it gradually came back. Whatever, the coolant puking has never been very bad on my truck and is now the least of my concerns. Now the truck has developed some sort of a skip or miss when I first take off for work in the morning. It doesn't matter if the truck is warmed up or not. I get to about 4th or 5th gear very light on the throttle rolling up a hill and it feels like injectors start cutting out. I datalogged this problem and it showed the injectors firing as normal. I then suspected transmission issues seeing as I have a reman in with about 3k miles on it and it only seemed to do it in selective gears only when I first took off. Then it later seemed as if it was slipping randomly in lower gears even when fully up to operating temps.
Since then I brought the truck into the dealer and told them I suspected possible transmission issues as well as the common puking coolant. They had the truck for a week, drove it 30 miles or so and spent 8 hours going over all the coolant systems. They found nothing. Stock tuning the truck runs flawlessly and will not puke coolant. All systems were pressure checked and passed. They even sanded down the coolant bottle to ensure a tight seal on the cap.
I have the truck back now with nothing fixed. I cant blame them because it shows no signs of issues. However while it was there, they reflashed the truck... great. So after calling up Eric at Innovative I got all new tunes emailed back in a day or two.
So here we are today... Xtreme Street installed, and I started driving it hard. I have found some new issues now. Truck still pukes coolant, but I pretty much expect it at this point. No visible signs of head gaskets leaking... However when I romp on it while doing a slow roll, the truck will only run up to 3700rpms or so (roughly stock) even though my SCT is set at 4150. Before it always ran up to 4150 without issue. Now in 2nd gear it runs to 3700ish, shifts normal and hard, then starts running up in 3rd gear, and right about when it seems it gets to 3700, it defuels. It doesn't slow down, but the revs drop. It seems to do this all the time now. From a dead stop WOT run, the truck shifts good and hard, just at 3700 rpms, then certain gears it just defuels (at least what I think is defueling). It still pulls and runs OK, just drops R's. Now I'm concerned. It does this in both Xtreme Street and Xtreme Race.
I dont even know where to start anymore.
I'm going to try changing the oil on monday after I get out of work, as it still has whatever the dealer put in from the headstud install.
Any suggestions? I have the laptop to do datalogging if anyone can point me in any direction there. I'm pretty much on my own since the dealer cant find anything on stock. If I am destined to drive the truck stock for the rest of its life with me, I will do so with my head hanging low. I'm really losing faith in this truck. It is aggrivating driving $45K vehicle that never seems to run correctly...
If you want the full details of the truck and the problems I've been having up to this point, check out this thread...
ARP's and still puking... update.
Thanks to all the techs and onlookers who have offered advice so far, its appreciated. At this point I would really like to get the truck running back to where it was before I try and tackle the coolant issue as its somewhat minor compared to what it's doing right now.