MAF plugged in = wont idle cold ?

[habib99]

 

Soooooo my quest to get this EA82T running continues....

 

Couldnt get the engine to idle when cold, it just about splutters with the gas pedal being pumped and when I finally got it hot it ran a bit better but not 100%.

 

mdjdc on here suggested MAF could be faulty, at first I assumed it wasnt because it was working fine in the donor car before I swapped but then in depseration I tried it unplugged, lo and behold it idles pretty much noramlly, but wont rev up that well.

 

Is this diagnostic? My initial thought was that the MAF must be faulty -or the wiring to it, but then it occured to me that unplugging it may just compensate for other problems.

 

Any adivce on this would be great. and thanks to 'mdjdc' for the initial pointer.

 

Habib

[mikeshoup]

Check your vacuum hoses... Sounds like maybe a vacuum leak. It won't idle very well with a loose vacuum hose since air is being drawn in unmetered. That's why unplugging the maf works, as it puts the system into a 'limp' mode (obviously, in this case limping is useless)

 

Sounds stupid, but also make sure you have the oil cap back on. Tried starting my car yesterday after I changed the oil, and the sucker just wouldn't run right... until I put the oil cap back on. (creates a vacuum leak too!)

[habib99]

Check your vacuum hoses... Sounds like maybe a vacuum leak. It won't idle very well with a loose vacuum hose since air is being drawn in unmetered. That's why unplugging the maf works, as it puts the system into a 'limp' mode (obviously, in this case limping is useless)

 

Sounds stupid, but also make sure you have the oil cap back on. Tried starting my car yesterday after I changed the oil, and the sucker just wouldn't run right... until I put the oil cap back on. (creates a vacuum leak too!)

 

 

So not necassarily the MAF or its wiring.

 

the oil cap is kind of loose even when it is on, it gets tight but then as you make the final twist it loosens a bit -is this normal? I could check this out by simply putting my hand over the oil hole.

 

So does the same go for all the ventilation pipes that go all over the place?, a few of them are a bit stiff and brittle and it is difficult to tell how well sealed they are.

 

thanks again.