hi everyone. Having a slight issue with my 2F and really would appreciate some advice on where to start looking from some of the more experienced members on here.
I have started to drive my 45 daily again after taking a couple of years to restore it. Before i started on the build the ute was used by me for 3 years then when my father rolled his GQ patrol it got put to work hauling a diesel tank and his tools for his daily maintenance on his truck and drott. He worked in the ranges so it was doing 200 klms a day in quite steep country for 8 months. In all that time i never had any issues with it nor did he. we both used to get a smile on our face as we buried the throttle into it to hold 90kmh up a hill and it would start to rumble out a beautiful note as we started to climb the hills. It used to cruise nicely on 100kph on the freeway aswell.
After starting to drive it daily again i noticed the secondary wasnt working anymore. I did a carburettor rebuild about 9 months ago but didnt have the secondary diaphram in the kit so i didnt change it at the time. i got a new diaphram and installed it and took it for a test, I thought i'd found the problem. I got into top gear slowed down to 40kph and held the throttle wide open and initial response was great and as the revs started to climb i got a really good increase in power with no flat spots or hesitation. I think ive got more power and throttle response than i ever have but as i started to approach 100kph i noticed it wasnt running as well and by the time id gotten just over 100kph it was evident that not all is well and there is black smoke out the tailpipe when this happens.
It starts great whether its cold or hot. It runs really nicely on take off i can accelerate through the gears and take it up to 70kph in third with no issues. It feels like after i hit 95 in top gear its not running as smoothly as it is at 90.
Its Australian spec 1979 model with no emissions and i have all vacuum lines plugged up except the vac advance on the distributor. It has a new set of plugs and wires aswell as rotor button and cap. New coil with resistor installed at same time as new points. Last time i checked vacuum (about a month ago) it was nice and steady at 21''.My vacuum advance moves freely when i apply vacuum to the diaphram. Spark plugs look good. Air filter is new. Fuel pump is rebuilt. When i get some free time next weekend im going to check valve lash, check points gap, put the timing light on it and flush the fuel system and put a new filter on. Fuel runs freely through the one on it at the moment but ill put a new one on.
My fuel level is about 3mm below the dot in the middle of the sightglass?? Could that cause issues higher in the revs in top gear? Its only ever a short period i get to those revs in third gear were it is fine but in fourth at 100 its constantly at those revs? ive got 31'' tyres and 4.11:1 diff ratios so i think its around 3000 rpm that i have the issue in top gear.
I"d like to be confident there isnt anything ive overlooked in the ignition system or fuel system up to the carburettor before i go looking in the carb.
thanks in advance to anyone that shares some advice.
I have started to drive my 45 daily again after taking a couple of years to restore it. Before i started on the build the ute was used by me for 3 years then when my father rolled his GQ patrol it got put to work hauling a diesel tank and his tools for his daily maintenance on his truck and drott. He worked in the ranges so it was doing 200 klms a day in quite steep country for 8 months. In all that time i never had any issues with it nor did he. we both used to get a smile on our face as we buried the throttle into it to hold 90kmh up a hill and it would start to rumble out a beautiful note as we started to climb the hills. It used to cruise nicely on 100kph on the freeway aswell.
After starting to drive it daily again i noticed the secondary wasnt working anymore. I did a carburettor rebuild about 9 months ago but didnt have the secondary diaphram in the kit so i didnt change it at the time. i got a new diaphram and installed it and took it for a test, I thought i'd found the problem. I got into top gear slowed down to 40kph and held the throttle wide open and initial response was great and as the revs started to climb i got a really good increase in power with no flat spots or hesitation. I think ive got more power and throttle response than i ever have but as i started to approach 100kph i noticed it wasnt running as well and by the time id gotten just over 100kph it was evident that not all is well and there is black smoke out the tailpipe when this happens.
It starts great whether its cold or hot. It runs really nicely on take off i can accelerate through the gears and take it up to 70kph in third with no issues. It feels like after i hit 95 in top gear its not running as smoothly as it is at 90.
Its Australian spec 1979 model with no emissions and i have all vacuum lines plugged up except the vac advance on the distributor. It has a new set of plugs and wires aswell as rotor button and cap. New coil with resistor installed at same time as new points. Last time i checked vacuum (about a month ago) it was nice and steady at 21''.My vacuum advance moves freely when i apply vacuum to the diaphram. Spark plugs look good. Air filter is new. Fuel pump is rebuilt. When i get some free time next weekend im going to check valve lash, check points gap, put the timing light on it and flush the fuel system and put a new filter on. Fuel runs freely through the one on it at the moment but ill put a new one on.
My fuel level is about 3mm below the dot in the middle of the sightglass?? Could that cause issues higher in the revs in top gear? Its only ever a short period i get to those revs in third gear were it is fine but in fourth at 100 its constantly at those revs? ive got 31'' tyres and 4.11:1 diff ratios so i think its around 3000 rpm that i have the issue in top gear.
I"d like to be confident there isnt anything ive overlooked in the ignition system or fuel system up to the carburettor before i go looking in the carb.
thanks in advance to anyone that shares some advice.