Pajero IO Rough and poor running
Hello all,
In this post is a youtube link showing you the actual symptoms of the problem. When the car was bought second-hand, and when cold, the engine would hesitate a second when the accelerator was pressed. Thought I'd have to clean the airflow sensor one day. Then before I got the chance to do that, we went for a day trip. The engine started to just lose power. When the accelerator was pressed, it took a long time for the RPM to increase, and never went high enough to powerit up a gentle hill. Had to tow it home, almost. Since then I've installed a new MAS, new idle control valve, with no improvements. Have also tried running the engine with the exhaust manifold unmounted. No change.See the video here: https://
Any advice needed.
Many thanks.
Hello, Thanks for the
Hello,
Thanks for the suggestions.
Here is a link to a video update on what I've done so far to the Pajero.
Re-cap on the symptoms: -Loss of power one sunny day. Limped home.
-Very hard to start since. Popping and backfiring heard in the airbox when starting.
-Idles poorly, red hot exhaust in 2 minutes of running
-Slight hissing sound when idling.
-When accelerator depressed, RPM dips, then struggles to rise.
What I have done since:
-Spark plugs changed.
-Mass airflow sensor changed.
-Idle control valve changed.
-Throttle position sensor changed.
-Fuel pump checked: it runs and pumps out fuel, alright. The fuel quality is acceptable, here in Vanuatu (sSouth Pacific Islands)
-Removed the exhaust section by section, and ran it every time a section was removed. She starts up readily, but still that loss of power when I accelerate. There are no oxygen sensors in the exhaust, BTW.
-EGR valve blanked.
(Didn't do anything to the electronic sensors down the vacuum line, apart from unplugging it as it ran. No change). NO IMPROVEMENT OR CHANGE. I'm out of ideas.
Same Here
Yeah I'm having the exact same problem, just how you described in the video but mine is a 4g18 (1.6lt) I'll be very interested to see how you get on. I even sent my car to a mechanic and he couldn't work it out. He put the car on his OBDII reader and the system couldn't read the codes for some reason. He seemed to think that it was a timing issue but couldn't fault it. I changed MAP sensor, oxygen, spark plugs, coolant temp, TPS and cleaned the IAC. Still nothing.... 
Syndicate
problem
Welcome to the forum,
You mentioned a red hot manifold after min idling, this could well be because the timing is out, faulty timing sensor, timing belt or even the lead mixed up (although it would idle rough and back fire when accelerated)
Other first things that come to my mind is the fuel filter (or crapy fuel), spark plug and/or coil, blocked air filter (you probably checked that one), timing belt out, timing sensor.
Checking the engine compression, and read the ECU for fault, disconnect the battery for reset a possible fault.
Could be other but this is where I would start....
Happy io
My io is now SOLD Thankshttp://pajerio.com/forum/claudes-io-2002-zr-built-thread-onlyhappy-io