Peer81
Well-known member
Well this is a long one!
I just rebuild my E4ME almost to the letter put it on the motor and warmed everything up. After that removed the aircleaner and tried to get the dwell as close to 30 as I could but there is the problem. I also have my dual A/F meter in the exhaust and the A/F meter has some simple output that it is sending to the ECM so it can control the lean/rich situation.
Now the problem. Dwell is always at 25! The needle is searching a little (maybe 1 or 2 degrees total). But my A/F meter is saying i'm running rich at 11.5:1. So I turned the idle screws out until the mixture was around 13:1 to 15:1. The vacuummeter is around 20Hg (sometimes a little more) and I checked for vacuumleaks (when it was running lean) no problem there. When I'm driving slowly acc. to 30mph the mixture is at 12.5:1 (not 14.5 as it should be) so it is running rich again. When going back to idle the mixture is leaning out to around 14:1.
When I was back at the garage I looking inside the carb from the top with a bright flashlight and could see the plunger isn't moving! And that would explain the rich condition when driving. So I took solenoid out of the carb and replaced it with another one (I tested before putting it in!).
On this one the dwell meter still said 25 degrees well it was a horrible idle with a 18:1 mixture. When I "flash" the carb with my hand (to decrease intake air) the idle was going up. This means the A/F meter is right! Checked again with my light and the plunger was moving up and down (could also hear the sound. Again set idle to around 14:1 and dwell still at 25. Driving around and again the same thing in the beginning I see the mixture around 14 or 15:1 but after a few minutes I'm back at 12.5:1. And yes after checking the plunger again dead in the water (at full rich)
First I was thinking the dwell meter was broken, now I'm hoping the dwell meter is broken... When I set the key to start the engine the ECM (check engine) light is working and after starting it goes out. The ECM light is never on (even when I disconnect the CO sensor in the exhaust the light doesn't come on). When I remove the connector from the solenoid at the carb then the light goes on (but the mixture stays the same...)
So if somebody can point me into a direction please do as I think another ECM or bad wiring are my only options right now.
Greetings Peter
I just rebuild my E4ME almost to the letter put it on the motor and warmed everything up. After that removed the aircleaner and tried to get the dwell as close to 30 as I could but there is the problem. I also have my dual A/F meter in the exhaust and the A/F meter has some simple output that it is sending to the ECM so it can control the lean/rich situation.
Now the problem. Dwell is always at 25! The needle is searching a little (maybe 1 or 2 degrees total). But my A/F meter is saying i'm running rich at 11.5:1. So I turned the idle screws out until the mixture was around 13:1 to 15:1. The vacuummeter is around 20Hg (sometimes a little more) and I checked for vacuumleaks (when it was running lean) no problem there. When I'm driving slowly acc. to 30mph the mixture is at 12.5:1 (not 14.5 as it should be) so it is running rich again. When going back to idle the mixture is leaning out to around 14:1.
When I was back at the garage I looking inside the carb from the top with a bright flashlight and could see the plunger isn't moving! And that would explain the rich condition when driving. So I took solenoid out of the carb and replaced it with another one (I tested before putting it in!).
On this one the dwell meter still said 25 degrees well it was a horrible idle with a 18:1 mixture. When I "flash" the carb with my hand (to decrease intake air) the idle was going up. This means the A/F meter is right! Checked again with my light and the plunger was moving up and down (could also hear the sound. Again set idle to around 14:1 and dwell still at 25. Driving around and again the same thing in the beginning I see the mixture around 14 or 15:1 but after a few minutes I'm back at 12.5:1. And yes after checking the plunger again dead in the water (at full rich)
First I was thinking the dwell meter was broken, now I'm hoping the dwell meter is broken... When I set the key to start the engine the ECM (check engine) light is working and after starting it goes out. The ECM light is never on (even when I disconnect the CO sensor in the exhaust the light doesn't come on). When I remove the connector from the solenoid at the carb then the light goes on (but the mixture stays the same...)
So if somebody can point me into a direction please do as I think another ECM or bad wiring are my only options right now.
Greetings Peter