- August 3, 2000
- Reaction score
- City, State
- NORTH IDAHO, 7B
- Year, Model & Trim Level
- B2 "Slightly" Modified
yup I know that story all too well
Good job. Do you have hydrolic lifters? We used to have it at idle and then back off the adjusting nut untill it ticks and then turn down untill it stops and then go 1/2 turn more on all rockers. I think you really need to check the rockers. IF your harmonic balancer is indexed 90 degrees you could just brlng number one up to TDC adjust and then turn crank 90 and go to next cylinder in firing order and repeat on next cylinder. Just a thought.
I have often thought of a valve cover with a removable panel, for just this reason.
I think it could be made easy enough huh?
Now that there is a good idea. Develop one and you'll make some cash in the EFI performance market!!!
So my other question is in regard to vacuum. I can't find any specs in my manual for some reason (i hate chiltons sometimes)
IMO, I don't think you'll get the same vacume reading in a shop manual. This would be due to that more aggresive cam profile. Depending on how much split overlap you have will have a determining factor on your vacume. On your more performance cams this is when the intake and exhaust valves are both of their seats at near the end of the exhaust stroke. This helps in scavanging the clyinders for more fresh air by letting the momentum of the exhaust pulses pull air thru the partially opened intake as the piston reaches and gets at TDC. So now you are starting to get a free charge of fresh air before the piston even starts it's downward intake stroke. But this also happens to lower your vacume and your lower rpm throttle responce. So don't be surprised if it your vacume is lower. And this is where that distictive lope sound comes from at your idle. But at higher rpms is when the split overlap design really comes into play.
Does the ticking you hear sound like the ticking of all 16 rockers or just a couple and is it on both cylinder banks?
rookieshooter said:IMO, I don't think you'll get the same vacume reading in a shop manual.
This would be due to that more aggresive cam profile................
rookieshooter said:Does the ticking you hear sound like the ticking of all 16 rockers or just a couple and is it on both cylinder banks?
dreamr said:Last issue .......... it howls. In fact it kinda reminded me of when the Explorer IAC first started going out.....
Remember mine--the surge is gone now--the hanging idle persists
Check the video in this thread
My throttle body whistles like I had a turbo---I like it!!
It is the camshaft--