Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a old 1993 Mitsubishi Triton MJ which is having a bit of an issue at the moment with acceleration. With the initial acceleration such as moving away from traffic lights the engine will often sputter and struggle and almost stall.

From my basic knowledge and knowing the fuel lines and filter aren't blocked I have come to the conclusion that it is a vacuum leak or issue with the pcv pump.

Is there any way to diagnose which it is before replacing parts?

Having said that, it's probably worth going through and replacing all the vacuum hoses anyway on a vehicle of this age.

share|improve this question
Is there actually a PCV valve on the Mitsubishi Triton. I have the same vehicle though it's a 1994 version. If there is one where is the PCV valve on the is vehicle? – user3949 Nov 12 '13 at 7:09

For such a cheap part, if you suspect the vacuum hoses then just replace it to remove it from the list of possible causes.

From my knowledge the MJ tritons were still carburettor. If this is the case then perhaps it might be worth trying to diagnose a possible carburettor issue. If it performs this behaviour at any particular throttle position then it might be easier to diagnose as a carb issue. i.e. if it does it constantly when getting towards WOT then you might find it's a blocked, dirty or clogged main jet, if it's always in the middle range then it could be jet needle etc

Best of luck with it.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.