After watching the service engine soon light for some time now (code 0401) I tackled the EGR to intake manifold tube. A little tough to remove but can be done. It was open and not cracked so I sprayed a small amount of carb cleaner in the intake hole, repalced tube.
Now comes my question this time. First it starts and idles great. Problem (if it is one) it won't accelerate above 4000 RPM. At 4K rpm it will bounce up and down a few hundred rpm'*. I'm keeping in mind it'* still in open loop. May go above 4K rpm after closed loop. Yes, no, maybe??
Next associated question. At first I thought I wouild need to remove the throttle body to have access to the EGR tube. Started by backing the body retaining bolt out and saw it was dripping coolant (antifreeze) below the throttle body. Noticed a slight damp area from what seemed to be an old seepage. I'v noticed a faint antifreeze smell for weeks now. Begining to wonder if the seepage and 0401 code is associated. Don't sound right. Did notice the throttle body was warped a bit from top to bottom. There should have been more bolts engineered around this area. My opinion.
I had replaced earlier (month or so ago) the EGR valve and the SES light stayed off for a week or so. Thought I had it.
Back to the fluctuating RPM issue. Any opinions? Tips? Ridicule?
Thanks guy'*. Eddie