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Showing results for tags '280zx cold start problem l28'.
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I've had my Z for about a year and it has always had this cold start problem. I've acctually thought it was normal for and old car, but it just doesn't seem right. Heres what it's doing. Upon cold start up, turns over just fine with no excess cranking. If i try to even give it the slightest amount of throttle while cold, the engine stumbles and backfires. It won't pick up RPM at all. Sometimes, if i give it more than 1/5 throttle when its cold, it will nearly stall for a sec (RPM drops below 500 for spit second until pedal is released) I have to wait for the cars temp to reach at least 120 before its pretty much drivable. Starts to run normal at around 140. Heres what i've replaced involving the engine management system: -CHTS -IAC -O2 Sensor Car has roughly 65,000 Miles.
