Rough idle and lean
#1
Rough idle and lean
Car always drove fine on the highway and on streets. However the idle was always an issue. Rough and searching. Would drop to 13then back to 16 constantly trying to find a clean idle.
MS3x is the ECU on a 95 turbo 1.8 i attached a data log of it.
I was thinking maybe my timing was off so i pulled out the timing gun and saw the pulley had two lines. A yellow -then> a white mark. The marks were lined up to 10 btdc to the yellow and the TDC was set to the white mark.
Car still idled crapply, and my AEM wideband was showing lean completely. Not sure whats really going on, any advice?
MS3x is the ECU on a 95 turbo 1.8 i attached a data log of it.
I was thinking maybe my timing was off so i pulled out the timing gun and saw the pulley had two lines. A yellow -then> a white mark. The marks were lined up to 10 btdc to the yellow and the TDC was set to the white mark.
Car still idled crapply, and my AEM wideband was showing lean completely. Not sure whats really going on, any advice?
#3
You are trying to do two things with one output, so nothing works till you fix the conflict. You shouldn't need the tach out for a NA miata, unless you have weird cops? If it was working, you had to change something to cause this to happen. The idle sounds like the surrounding VE cells need tuned, it hunts across cells, so some cells are lean and others are rich. Causes hell on CL idle.
Is your IAC valve driven by the tach out on the MS3? Should be FIDLE, or at least I'm sure that's the most common.
On the bottom of the Basic/Load settings tab there's a option for Feature list showing I/O pins, should show the conflict.
Is your IAC valve driven by the tach out on the MS3? Should be FIDLE, or at least I'm sure that's the most common.
On the bottom of the Basic/Load settings tab there's a option for Feature list showing I/O pins, should show the conflict.
#10
Just tinkered with the car, realized i was having poor and low vacuum. So i started to look for a vac leak. Made sure the line going to my ECU wasnt kinked, and the FPR and BOV seemed okay too. Realized my #1 injector seal to block was leaking and sucking in the spray. So i guess that might explain why my idle is so off.
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09-30-2018 01:09 PM