Holly water time

[Rebel]

Aim working on an 84 2m4

The problem aim having is a pulse like miss when I bring up my idle around 2000 rpm the miss/ like surge is also present while peddle pressure is light seem to go away while engine is under load like accelerating
I have check all sensor they seem to all be ok had a mechanic run is diagnostic computer on it 3 hours later still no result
Next step is holy water I think it F;;;;;;;; Poses
If any one as had similar problem in found a solution please let me no

All feedback will be warmly welcome

Thank you
Rebel

fierorebel@sympatico.ca
 

[JetJumper]

I have had that, but that was with the old engine which is now DEAD.  I couldn't tell you what was causing it, but I was sure it was electrical

[dguy]

Rebel,

Does this happen when she's hot, cold, or all the time?

I've heard more than one complaint of un-curable rough running/hesitation/you name it when the Iron Duke is cold, which disappears after she warms up.  I haven't seen any concrete evidence to support it, but my theory is that the static values which the ECM uses while in open-loop are less than ideal for a moderately worn engine.  Once the O2 sensor warms up and the ECM swithes to closed loop, it starts "thinking" and the hesitation & whatnot goes away.