Hello everyone. I've been around this forum for a long time, but this is my first post. I need help with a confusing engine code. I've got an 1981 Porsche 928 Euro 5sp. My VIN is WP0ZZZ92ZBS841366 which confirms that my car is an 81 Euro. However, my engine code is 28/22. When I looked up the code, it shows 28/22 as an 84 Euro auto. Do I have an 84 engine or just block? I'm confused because I believe my top end is 81 Euro. I don't know enough about the 928 to figure this out. I need to know what I am dealing with because I'm trying to troubleshoot a stumble on acceleration issue. My car was running fine and out of the blue it started stumble or flood when I accelerate in any gear. It idles fine and will drive ok in low rpm range, but if I give it gas, it will just bog down. I've replaced the fuel pump and filter, still doing the same thing. I have limited tools and knowlege, but I want to figure this out and not have to take it to someone. Any help/thoughts would be greatly appreciated.
