Hmm....maybe I'm wrong about the seconds. It could be the 90-93 ECU's prime for 1/4 sec and the 95 ECU primes for something like a full second. I just know they are definitely different.There's a check valve under the car,(near the backend) protected by some plastic guards, it runs on the vapour line between the tank and the CC. It's also called a rollover valve, it's on page EFEC 192. I know Robo has a pic on his site of it. Another thing I was thinking about, is how your pressure is relevant to the intake manifold pressure. Maybe the first 10 minutes of higher pressure is only there because your engine is idling higher and the engine has less vacuum pressure? I know I'm probably not saying that or this right, but have you checked your fuel pressure against your vacuum/boost engine pressure? Do they always change together?
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1995 300ZX TT |