Calling all gurus, I have a '94 FZJ80 aussie spec. I've had a problem that Ive been trying to solve for a while but cant get to the bottom of it. I have a hesitation when accelerating from idle to 2000rpm, the best was to describe it is like theres water in the distributor. After 2000rpm, the car drives normal. When the car warms up, any hesitation becomes less noticeable/goes away.
I've tried to solve the problem by throwing parts at it over a period of time. I've replaced:
There are no CEL codes displayed.
This hesitation is noticeable when the timing is at 3-4 degrees, but is not noticeable when timing is advanced to about 6-7 degree.
The car is now on straight petrol, it used to be a dual fuel petrol and LPG. The hesitation was not noticeable when driving on LPG.
I'm not sure what else is left to check - value seats...?
Looking forward to hearing your thoughts and ideas on how to fix this problem.
I've tried to solve the problem by throwing parts at it over a period of time. I've replaced:
- Air Flow Meter
- Fuel Pump,
- Fuel Regulator
- EFI module
- PCV value and grommet
- O2 sensor 2x - Denso and NGK
- injectors
- Distributor Cap - OEM
- Rotor button - OEM
- Ignition Leads - NGK and Bosch
- Coil/ignitor
- Spark Plugs - OEM gapped 0.8mm
- Cleaned Throttle Body (TB)
- Replaced TPS
- Intake hose to TB
- Replace a few vacuum lines, rest seem ok from what I can see
- ...and I'm sure theres more...
There are no CEL codes displayed.
This hesitation is noticeable when the timing is at 3-4 degrees, but is not noticeable when timing is advanced to about 6-7 degree.
The car is now on straight petrol, it used to be a dual fuel petrol and LPG. The hesitation was not noticeable when driving on LPG.
I'm not sure what else is left to check - value seats...?
Looking forward to hearing your thoughts and ideas on how to fix this problem.
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