KCKrogoth

okay, I'm extremely new to the rotor scene and am already having problems with my newly purchased FD.

Prob 1: Car starts in the morning, first start of the day, and the coolant alarm goes off and the engine idles high for a while, prob just do to having to warm up, and then after screwing with the gas for a min it runs as advertised.

Prob 2: After driving for a while the idle will lag and the car will stall out while sitting at a stop light or something unless I rev the throttle to keep the RPMs up. Then she's hard to start again.

Prob 3: Shut the car off and the overflow for the radiator hisses from built up pressure for a few minutes like the car was overheated, but the temp never gets above normal and coolant is good.

Prob 4: Went back out driving after car was already warmed up from driving before, and car ran great until about 10 mins into cruising around then the idle problem cam back, and when the throttle is pressed down from about 2000-3000 RPM it stutters and backfires like crazy. If I mash it to the ground it revs up fine. Only on regular driving it acts nuts. Also, it's building boost at weird ranges and I'm not even giving it any gas. just trolling around around 2000-4000RPM the BOV is lighting off and I'm not accelerating hard. also, the Boost gauge is reading neg psi at the time too. I'm confused!

Some other things to note are that the car had an aftermarket ECU installed, then was tuned to that, then the guy pulled the ECU for the stock unit and never changed anything back. I'm curious if that is causing all these problems?

Any help will be much appreciated, Thanx all.

KCKrogoth

New addition to the problem:

Started the car and drove it around real easy on the acceleration being careful not to build boost and kept the RPM's under 3k. Car drove great, and idles fine. Shut car off, turned it on 10 mins later, hard to start and then idle went to crap, RPM's wont stay consistent with throttle position. Have to keep on the gas to keep it from stalling and backfires ridiculous amounts. Parked the car and had to keep feathering the gas to keep the car from dieing till the turbo timer shut off. What's the deal?

Please help!