cmp1516
Proven Member
- 52
- 21
- Aug 2, 2021
-
Quezon City,
Asia
So my NT 4g63 was overhauled but since the shop wasn't experienced around old engines it ran like crap.
Cold start idle were around 600 rpm, turning on AC would go down to 400-500, I unplugged the coolant temp sensor and idle got better (800-1k rpm). But the major problem is it "chugs" below 1500-1k rpm like slamming the throttle on-off until I clutch it in and smoothly press the throttle, it's really embarrassing around traffic since I can't let the car decelerate below 1500 rpm or it'll chug slowly until it reaches 1k where it jerks super violently. Accelerating at lower rpm, pressing the throttle slightly chugs violently then slowly goes away as rpm rises. Lastly it hesitates at low rpms.
So I emptied my wallet and bought some plugs (NGK BP6ES) and wires, fuel pump & filter and a used MAF sensor. Put those in then adjusted TPS, BISS, CAS and throttle cable finally car rans much more smoother, no more hesitation upon acceleration and even plugged the coolant sensor back in, the idle didn't crap out on me. It idles around 1k then bounces a little down to 950 without load but when AC is turned on it stabilizes at 950 rpm. But the major problem is still present, deceleration chugging and minor acceleration chugging at low rpms!
So far I'm guessing the TPS is on it's way out together with motor mounts since the mounts are all fabricated from junkyard rubbers and when chugging violently some clunking can be heard.
Cold start idle were around 600 rpm, turning on AC would go down to 400-500, I unplugged the coolant temp sensor and idle got better (800-1k rpm). But the major problem is it "chugs" below 1500-1k rpm like slamming the throttle on-off until I clutch it in and smoothly press the throttle, it's really embarrassing around traffic since I can't let the car decelerate below 1500 rpm or it'll chug slowly until it reaches 1k where it jerks super violently. Accelerating at lower rpm, pressing the throttle slightly chugs violently then slowly goes away as rpm rises. Lastly it hesitates at low rpms.
So I emptied my wallet and bought some plugs (NGK BP6ES) and wires, fuel pump & filter and a used MAF sensor. Put those in then adjusted TPS, BISS, CAS and throttle cable finally car rans much more smoother, no more hesitation upon acceleration and even plugged the coolant sensor back in, the idle didn't crap out on me. It idles around 1k then bounces a little down to 950 without load but when AC is turned on it stabilizes at 950 rpm. But the major problem is still present, deceleration chugging and minor acceleration chugging at low rpms!
So far I'm guessing the TPS is on it's way out together with motor mounts since the mounts are all fabricated from junkyard rubbers and when chugging violently some clunking can be heard.