'91 Pajero 2.5 TD Dies When Revved
Discussion
My friend has a '91 Pajero 2.5TD which has had a few issues. It started with a cracked head which was replaced with a new head. Prior to the head failing it ran absolutely fine, if pretty slow.
Now that it is all back together, it starts on the key, probably not one full revolution before it fires.
Idles absolutely fine with a clean exhaust.
When the revs are brought up, it gets to a point where it just dies with a rich smelling exhaust.
On attempting to restart, it requires bleeding at the injectors before it fires.
In order to isolate air leaks from the tank lines to filter, a seperate tank with clear hose was rigged to feed the high pressure pump
direct. No change.
In order to isolate a blockage in the return from the injectors, this was also fitted with a clear hose drain to a catch tank. Good flow of fuel and no change.
Does anyone have any better ideas?
Now that it is all back together, it starts on the key, probably not one full revolution before it fires.
Idles absolutely fine with a clean exhaust.
When the revs are brought up, it gets to a point where it just dies with a rich smelling exhaust.
On attempting to restart, it requires bleeding at the injectors before it fires.
In order to isolate air leaks from the tank lines to filter, a seperate tank with clear hose was rigged to feed the high pressure pump
direct. No change.
In order to isolate a blockage in the return from the injectors, this was also fitted with a clear hose drain to a catch tank. Good flow of fuel and no change.
Does anyone have any better ideas?
The injection is mechanical indirect injection. It does have a load position sensor on the pump and an engine coolant temp sensor. It also has a boost fuel compensation diaphragm on the pump. I have discounted this as the engine behaves the same when the turbo is plumbed in as when the intercooler is removed and the turbo compressor is blowing to air, hence making no boost.
The pump was not disturbed when replacing the head with the fuel supply and tank returns remaining connected.
Over fuelling as engine speed increases is my theory, due to the engine smoking rich before it cuts out.
Is it possible that the injector leak off pipe is restricted and causing an over fuel when engine speed increases?
The pump was not disturbed when replacing the head with the fuel supply and tank returns remaining connected.
Over fuelling as engine speed increases is my theory, due to the engine smoking rich before it cuts out.
Is it possible that the injector leak off pipe is restricted and causing an over fuel when engine speed increases?
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