How can I track down the issue that is causing my acceleration hesitation?
What is your question?
It's a *1987* Montero that has had the carburetor rebuilt a few years ago to try and fix this issue but to no success. I have replaced the fuel pump and am now in the process of draining all the fuel out and taking the entire fuel system off to clean out. The previous owner changed the spark plugs and the distributor cap. I've messed with the idle screws a bit and I have adjusted the throttle position sensor. I haven't the slightest clue what direction to go in now. I got a few particles from draining the gas out of the tank but I can't really tell for sure if it was in the tank or from pulling the plug out. I can't do much more with it now today as it's dark but I'll be taking the rest of the system off tomorrow. As far as I've seen the fuel filter has been removed and not replaced as it is now where to be found. I've read there is another filter in the tank and I'll be checking that. Is there anything else I can look for?
What makes this problem better or worse?
Better messing with idle screws worse on first acceleration
How long has your 1990 Mitsubishi Montero had this problem?
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Looking down carburetor - throttle bore using flashlight - open accelerator linkage while closely watching for initial accelerator pump discharge into throttle bore.. Should see gas squirt out into bore.. Without this additional fuel upon acceleration - engine will stumble / hesitate it will eventually overcome.
All I got is here is best ‘online’ guess.
Good luck!
Ethanol is very hard on ‘CARBURETOR’ parts and may have deteriorated accelerator pump seal.
This feels like a dead spot when accelerating - however engine will eventually recover - if your symptoms differ - this may not be your particular problem..
(Put a WEBER carb on it!)
Ethanol is very hard on ‘CARBURETOR’ parts and may have deteriorated accelerator pump seal. This feels like a dead spot when accelerating - however engine will eventually recover - if your symptoms differ - this may not be your particular problem.. (Put a WEBER carb on it!)
Man I'm really hoping not to change it to a weber