the 3.9 in my truggy has a small miss on idle, not to the point of stalling, but almost. I have it set up the same as the disco, accept for a VL commodore fuel pump, inline disposable fuel filter and pod air filter. I unplugged the airflow meter, and it went worse, so thats ruled out. will change the plugs and leads today, but is there anything simple i have missed or buggered up?
BTW whats the firing order of one of thse octocylinders?
Andy
Notice: We request that you don't just set up a new account at this time if you are a previous user.
If you used to be one of our moderators, please feel free to reach out to Chris via the facebook Outerlimits4x4 group and he will get you set back up with access should he need you.
If you used to be one of our moderators, please feel free to reach out to Chris via the facebook Outerlimits4x4 group and he will get you set back up with access should he need you.
Recovery:If you cannot access your old email address and don't remember your password, please click here to log a change of email address so you can do a password reset.
3.9 miss
Moderator: Micka
reset the ECU and then tune the AFM to the right resistance, set the base idle then check the timing with a vacuum gauge - could be that the balance has slipped and the timing was last set via timing light and could be wrong.
Just some ramblings
Tom
Just some ramblings
Tom
"It was just an ordinary day, and you saw them. There were guys in their Porsches, "Look at me in my Porsche, ha ha!" and they were overtaken by a van. Driven by a girl!"
Ok' now how do you reset the ECU and tune the AFM?RaginRover wrote:reset the ECU and then tune the AFM to the right resistance, set the base idle then check the timing with a vacuum gauge - could be that the balance has slipped and the timing was last set via timing light and could be wrong.
Just some ramblings
Tom
You can set the hotwire style airflow meters off a 3.9 to a base spec, by measuring the resistance between the two end pins - should be 100 ohms. If nothing comes up at all (open circuit), you're out of range (normally too lean, try winding in 2 or 3 turns). Setting it to 100 ohms, with everything else in good condition, is generally pretty close to ideal.
Never heard of resetting the ECU though.
Never heard of resetting the ECU though.
84 Rangie, 3 inch spring lift, 2 inch body, Megasquirted 4.6, R380, rear Maxi, 34x11.5 JT2s. Simex FM installed.
I have had problems with the car not taking the new settings once the AFM has been re tuned, I have had to take the neg off the battery for a few minutes then reconnect.RangingRover wrote:You can set the hotwire style airflow meters off a 3.9 to a base spec, by measuring the resistance between the two end pins - should be 100 ohms. If nothing comes up at all (open circuit), you're out of range (normally too lean, try winding in 2 or 3 turns). Setting it to 100 ohms, with everything else in good condition, is generally pretty close to ideal.
Never heard of resetting the ECU though.
That is what I call resetting the ECU
Tom
"It was just an ordinary day, and you saw them. There were guys in their Porsches, "Look at me in my Porsche, ha ha!" and they were overtaken by a van. Driven by a girl!"
Who is online
Users browsing this forum: No registered users and 6 guests