Wajulia
Well-known member
Is it only the idle that is of concern at this point -- it runs fine off idle -- no black smoke -- no 6MPG? if so -- focus on the idle circuit
The idle circuit on the e4me is controlled by the computer using a the Mixture solenoid and the idle air bleed plunger. You can see the plunger adjustment from the top of the carb -- it is the large brass screw right in front of the primaries looking straight down.
There is a very precise adjustment procedure for it in the service manual, I will try to send it to you tonight. But this is my poor mans version is below, you need to have a dwell meter. You can do it without out one but you need a little luck, and you learn a lot about the computer/carb interaction if you have one.
Gently screw it in until it bottoms out , it is very fragile, just barely bottom it out. back it out 4 full turns. Connect a dwell meter to the green connector that is just sitting in front of the carb somewhere -- normally it is not connected and just sitting on top of the engine.
With the dwell meter on the 6 cylinder setting, it should be reading 30. Adjust the screw in small increments (1/8 turn, letting the engine stabilize) until you get the reading. Without a dwell meter, turn-wait-turn-wait - after about a turn or so something is not working. I have seen cars come alive doing this when the carb and computer start working together -- it makes you wanna cry!
This will tell you if the computer is controlling the carb properly. if it does not work, there may be a few other things that can be checked
1) Adjust the idle mixture screws in the front of the carb. Baseline at 3 turns out from the bottom, adjust 1 turn out at a time on both screws. looking to see if the dwell begins to change. (this usually has much less effect on the carb than the idle air bleed valve)
2) the carb needs to be cleaned and rebuilt -- While this is not a big deal and can be done with some simple research -- it is probably not necessary
3) the carb has nothing to do with the idle problem. Check all other emmision controls -- EGR?
Good luck
The idle circuit on the e4me is controlled by the computer using a the Mixture solenoid and the idle air bleed plunger. You can see the plunger adjustment from the top of the carb -- it is the large brass screw right in front of the primaries looking straight down.
There is a very precise adjustment procedure for it in the service manual, I will try to send it to you tonight. But this is my poor mans version is below, you need to have a dwell meter. You can do it without out one but you need a little luck, and you learn a lot about the computer/carb interaction if you have one.
Gently screw it in until it bottoms out , it is very fragile, just barely bottom it out. back it out 4 full turns. Connect a dwell meter to the green connector that is just sitting in front of the carb somewhere -- normally it is not connected and just sitting on top of the engine.
With the dwell meter on the 6 cylinder setting, it should be reading 30. Adjust the screw in small increments (1/8 turn, letting the engine stabilize) until you get the reading. Without a dwell meter, turn-wait-turn-wait - after about a turn or so something is not working. I have seen cars come alive doing this when the carb and computer start working together -- it makes you wanna cry!
This will tell you if the computer is controlling the carb properly. if it does not work, there may be a few other things that can be checked
1) Adjust the idle mixture screws in the front of the carb. Baseline at 3 turns out from the bottom, adjust 1 turn out at a time on both screws. looking to see if the dwell begins to change. (this usually has much less effect on the carb than the idle air bleed valve)
2) the carb needs to be cleaned and rebuilt -- While this is not a big deal and can be done with some simple research -- it is probably not necessary
3) the carb has nothing to do with the idle problem. Check all other emmision controls -- EGR?
Good luck
