Just want to run this past anyone for some feedback. *BACKSTORY* so since I've bought my car I've always had a bad idle, over time it's gotten worse so I finally went to tackle it myself since no local shops wanted to help. So far I have done the following:
- Replace ISC
- Have had TB rebuilt / Blocked off FIAV
- New Biss o-ring
Since doing this the car actually now fluctuates just a little bit (no more 200-1000). I am still getting some fluctuations from smaller increments (900-1000). I haven't set the idle yet properly since I ran out of daylight so will pick up tomorrow. Something else to add is that when I give it a little gas the RPMs dip a little before ramping. Would my final issue be now the EGR valve perhaps? A check engine light goes on but I haven't been able to test a working scanner to see what it is.
NOW on to the 2nd issue
I just got back an ECMLink'd ECU and when I plug it in the car starts but dies after a second. This ECU isn't the original one but off another VR4. However when I plug back in my original ECU the car starts and is able to run. Any idea why this might be?