Hey folks, today I visited another MN DeLorean owner's place to try and see whats wrong with his car. What its doing... Starts up right away, but then idles very rough, but will eventually smooth out. Any throttle movement will almost kill the car. There were a few times I could get it to about 4500, but usually it wouldn't go past 1800 no matter how well I played with the throttle. There seems to be an apparent exhaust leak on the passenger side, most likely the manifold gasket, the owner said it wasn't this loud before. What I checked... Swapped RPM and LAMBDA relays from my car, no avail. Removed fuel pump and inspected hoses, all good there. Did some unplugging and plugging back in of electricals for CPR, Cold start valve, frequency valve, and idle motor, everything acted as it should. Idle switch works fine. Full throttle switch is sticky, but currently unplugged. Tamper-Proof plug is missing. My theory... The owner says this happened very suddenly. He drove it to work one afternoon, all was good. When he started it up to go home, this was happening. Almost every fuel system and ignition component has been replace on the car probably about 1000 miles ago. I suspect that the fuel adjustment was never quite tuned proporly (hence no plug of any kind on the adjustment hole). I also suspect that the engine could have heated up just enough after being shut off, to break some kind of seal on the exhaust manifold. With this leak now there, the change in backpressure has thrown the fuel adjustment way out of whack. However... About a month ago, I was messing around with my exhaust system, and ended up with a fairly massive leak at the front seal for the CAT. The engine idle and reved fine (just a helluva lot louder) but under load, it would shake VERY violently. I somehow cured this buy shooting between 30mph and 60mph entirely in 2nd gear 3 times at wide-open-throttle, keeping it in gear when coasting back down to 30. Now I still had the leak, but the engine was perfectly smooth at all throttles at all speeds in every gear. Somehow somthing must have compensated. When I got the leak sealed up, there was no change in engine operation. It would have been nice to try this in his car, but we really couldn't get the D faster than 20mph. The Questions... I am suspecting the reason for this is because his fuel adjustment may have been out of whack in the first place, but was just good enough so the engine would run fine under normal condions. And now that they're not normal, it just can't do it. How close am I? Any other suggesions? Would you recommend fixing the exhaust leak first, or fine-tuning the fuel adjustment? It seems this post has turned out to be longer than anticipated, but at least its detailed! Thanks for any advise. Jim Reeve MNDMC - Minnesota DeLorean Club DMC-6960