| Re: [UPDATED] Car still runs badly... |
Subject: Re: [UPDATED] Car still runs badly... by bogus on 2011/11/27 19:13:59 I may reach out to him. I have several other diags to perform, and the guy at Dynaspark said he would test my unit for free. Same with the LTCC box. I want to test harnesses today, remove the LTCC and get it ready for shipment. Same with the Dynaspark. I will ship both out tomorrow. I can then use the down time to replace the rear bearings and ujoints. I found he had an issue with sensors, about the same time I sent mine in for repair last year. A new supplier promised him gold, and sold him lead... at least that's what he claims. My only problem... and this is what bugs me... is that it seems to be heat related now. It starts, it runs great, then after about 5 minutes, it falls apart and starts to run poorly. What I am learning is that not all LSx coils are equal. The LS1 is essentially the first generation coil... each subsequent version is better; more stable, more durable and more predictable. And more expensive. The latest are over $100 EACH. And the worst part? I haven't found an easy way to test them. Sure, if I have a pulse generator and an o-scope, yea, or even a Tech II, but there doesn't seem to be a fixed way of saying "this coil is bad." As I scan through the C5 and C6 service manuals, I find that coil replacement is based on a process of elimination. Make sure the circuit to the coil is good. Make sure the plug wire is good. Make sure the plug is good. If you are still getting the code (misfire, usually), replace the coil. This, I find, is rather annoying when you don't have the intelligence of OBDII to guide you... These coils are smart, and as such, you can't test them in the conventional way. They have a built in dwell and are sent a low voltage signal to indicate "charge up" and are then sent another signal that tells them to collapse the field and spark. whew. They are durable, tho, and are not common failure points. In short, I must diagnose this and found out the root cause before I consider the engine swap. I don't feel this is ENGINE related, but something endemic to what makes the car run. Installing a new engine would only migrate the problem. Unless it was opti related, because the new engine is a 96 LT1, with a GenII opti. |
