Installed used ACD pump, now have idle issues....
#1
Installed used ACD pump, now have idle issues....
So after a little diagnoses of my ACD problem, I discovered I needed my pump replaced. I bought one from a low mileage Florida car and recently installed it. After bleeding the system I started up the car and all was fine. Only the Tarmac light was lit up and I was happy. Then out of nowhere the car almost dies and then starts idling really rough, loping really bad. So i decided to take it out for a drive to see if warming the engine would solve things. I figure along with the crappy idle the drive ability would suffer. It seems to be largely unchanged. Low speed drive ability is the same, and there is no missing up top when boosting. But when it comes back to idle, it just sounds rough, sometimes sounding like it's missing a cylinder completely. Some of my other thoughts are that this pump is putting an enormous amp load on the car, maybe something is wrong with it, but wouldn't it throw the ACD lights on if that were the case? When I cycle the pump when the car is off, it runs for a second and then shuts off after reaching pressure. It doesn't sounds bad. Sounds like it turns freely and does what it's supposed to. I just find it odd that the car is now idling strange immediately after installing this thing. One thing to note, I was very low on gas and the car was jacked up in the front. Maybe I sucked something up, I don't know. Could be a coincidence I guess. My next step is to unplug the pump and see if that changes things. In the meantime, does anyone have any ideas?? Mods are in sig.
#5
No MAF, I'm SD on an AEM. I never disconnected anything other than the three plugs on the ACD unit itself. It's REALLY strange. The car was idling absolutely fine for about 30 seconds,then almost died, corrected, then went to a straight crap idle that doesn't seem to want to correct itself. I drove the car for about 20 minutes last night, it drives fine, just idles on 3 cylinders. My AFR's are much richer at idle too so the AEM is compensating for something.
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#9
No, honestly I haven't had time. I did drive the car for some distance a couple days ago, and it drives fine, just idles like crap. I'm waiting for some parts to fix a couple other small issues. I'll be sure to update when I figure this out. I've got a two week old newborn at home though so time is definitely hard to come by.