Dear Bros, has anyone experience when moving off from standstill, especially when you floor the accelerator, there is a drop in rpm, no power transmission to the car, car jerk and move a bit, took about 2seconds then there is power and car start to move. What are the possible problems. I hope its not the gearbox.
Throttle issue.
- Thread starter Thhmarc
- Start date
Re: Throttle issue.
both D and S mode also have this problem. Its like, when you accelerate, you expect fuel to flow and thus the car will move. But in my case, when i accelerate, it felt like empty...no fuel feel... jerks a while for 2 seconds, then car start moving....
both D and S mode also have this problem. Its like, when you accelerate, you expect fuel to flow and thus the car will move. But in my case, when i accelerate, it felt like empty...no fuel feel... jerks a while for 2 seconds, then car start moving....
Red_Bean_Bun
Well-Known Member
Re: Throttle issue.
What ride you driving ?
What ride you driving ?
Red_Bean_Bun
Well-Known Member
Re: Throttle issue.
I had that in my previous ride - it was a M54 engine. Hard acceleration from standstill there would be a 1-2 sec hesitancy. Engine died occasional when accelerating hard - happened once I was making a quick exit from a petrol station to get to lane 1 for a U turn. Ended up the ride straddled horizontally across lane 1-2 with cars approaching from a bend (blind spot for those cars) - a major KNN moment. Started the ride in time, scrambled into lane 1 then slotted the car in to the U turn slip area ......
Tried the following but did not resolve the hesitancy issues -
- new spark plugs
- new ignition coil
- changed to 98 octane petrol
- cleaned the maf sensor
- took the vanos out and changed all the o rings
- checked the vanos solenoid
- took the disa out out and cleaned it.
- looked for vacuum leaks
- changed the fuel pump and filter
- changed the ATF fluid and filter
- checked the o2 sensors
- sealed a bunch of exhaust leaks
- changed the VCG (no sludge found)
In the end scanned the obd and found all cylinders were misfiring. To re confirm - cleared the faults and took the car out for a spin. Came back and scanned again and all the misfiring faults showed up.
Was then thinking its either those new exotic spark plugs I was using or maybe it's the tune I was using (pre-ignitions due to the advanced timings etc). Removed the ignition capacitor mod - still did not help. Went on like this for a few years.
In the end, the oil pressure fault code showed up on the dash. Changed the oil pressure sensor and it did not help. The oil pump was going .........
The COE also was going to expire by then so heck the problems and sold it for what it's still worth.
Anyway, how about doing the reverse of what I did - scan it for shadow codes first then decide what to do next ........
I had that in my previous ride - it was a M54 engine. Hard acceleration from standstill there would be a 1-2 sec hesitancy. Engine died occasional when accelerating hard - happened once I was making a quick exit from a petrol station to get to lane 1 for a U turn. Ended up the ride straddled horizontally across lane 1-2 with cars approaching from a bend (blind spot for those cars) - a major KNN moment. Started the ride in time, scrambled into lane 1 then slotted the car in to the U turn slip area ......
Tried the following but did not resolve the hesitancy issues -
- new spark plugs
- new ignition coil
- changed to 98 octane petrol
- cleaned the maf sensor
- took the vanos out and changed all the o rings
- checked the vanos solenoid
- took the disa out out and cleaned it.
- looked for vacuum leaks
- changed the fuel pump and filter
- changed the ATF fluid and filter
- checked the o2 sensors
- sealed a bunch of exhaust leaks
- changed the VCG (no sludge found)
In the end scanned the obd and found all cylinders were misfiring. To re confirm - cleared the faults and took the car out for a spin. Came back and scanned again and all the misfiring faults showed up.
Was then thinking its either those new exotic spark plugs I was using or maybe it's the tune I was using (pre-ignitions due to the advanced timings etc). Removed the ignition capacitor mod - still did not help. Went on like this for a few years.
In the end, the oil pressure fault code showed up on the dash. Changed the oil pressure sensor and it did not help. The oil pump was going .........
The COE also was going to expire by then so heck the problems and sold it for what it's still worth.
Anyway, how about doing the reverse of what I did - scan it for shadow codes first then decide what to do next ........
