aussiearthur
New Member
- Joined
- Feb 1, 2022
- Messages
- 11
- Country Flag
G’day team,
long post, but really need some help, as this problem is killing me!!! And also my wallet.
Car is:
- 1kd 2007
- 213km
- auto
Fault:
- whether hot or cold, there is a fairly significant amount of hesitation/ surging occurring at 2100rpm, 2300rpm and 2400rpm. The car physically slows and rpm drop, lasts about a second and then surges forward. A few seconds later it repeats, and will continue until I move out of this rev range.
- no issues evident at other rpm ranges
- it is repeatable every drive.
- am concerned that this is damaging the engine.
- NO fault codes
- no smoke
- car runs beautifully otherwise.
- issue occurs using either the accelerator pedal or cruise control (so have assumed it’s not an accelerator position sensor issue).
There are a few threads in Pradopoint and New HiluxD4D forums which state similar issues (vehicles have similar manufacture dates too), but none of them ever reach closure on this issue.
I have:
- checked and cleaned heaps of electrical connections
- cleaned MAP and MAF sensors and filters, cold start idle values look ok.
- replaced MAP sensor
- cleaned EGR valve, the manifold and the cooler.
- turbo and stepper replaced at about 190k
- fuel filters (x2) and air filters recently replaced.
- SCV replaced ( with the long version)
- injectors replaced.
- swapped the whole throttle body with another.
- I performed a fuel leak test via Techstream, which saw the system hit its target set point and hold there with no codes thrown.
I feel like this is related to RPM, as I can consistently repeat this issue at the stated rpm levels.
could there be a link here to a sensor that is feeding the ecu some dud information - ie transmission speed sensor, egr valve, or a fuel temp sensor???
I would be absolutely grateful for any assistance on where to look next.
kind regards.
chris
long post, but really need some help, as this problem is killing me!!! And also my wallet.
Car is:
- 1kd 2007
- 213km
- auto
Fault:
- whether hot or cold, there is a fairly significant amount of hesitation/ surging occurring at 2100rpm, 2300rpm and 2400rpm. The car physically slows and rpm drop, lasts about a second and then surges forward. A few seconds later it repeats, and will continue until I move out of this rev range.
- no issues evident at other rpm ranges
- it is repeatable every drive.
- am concerned that this is damaging the engine.
- NO fault codes
- no smoke
- car runs beautifully otherwise.
- issue occurs using either the accelerator pedal or cruise control (so have assumed it’s not an accelerator position sensor issue).
There are a few threads in Pradopoint and New HiluxD4D forums which state similar issues (vehicles have similar manufacture dates too), but none of them ever reach closure on this issue.
I have:
- checked and cleaned heaps of electrical connections
- cleaned MAP and MAF sensors and filters, cold start idle values look ok.
- replaced MAP sensor
- cleaned EGR valve, the manifold and the cooler.
- turbo and stepper replaced at about 190k
- fuel filters (x2) and air filters recently replaced.
- SCV replaced ( with the long version)
- injectors replaced.
- swapped the whole throttle body with another.
- I performed a fuel leak test via Techstream, which saw the system hit its target set point and hold there with no codes thrown.
I feel like this is related to RPM, as I can consistently repeat this issue at the stated rpm levels.
could there be a link here to a sensor that is feeding the ecu some dud information - ie transmission speed sensor, egr valve, or a fuel temp sensor???
I would be absolutely grateful for any assistance on where to look next.
kind regards.
chris