Put new cams in this weekend, and have a few questions. Got
these Cams, and when the car's at operating temp, and sometimes before then, it sorta lopes/sounds a little off kilter. Its not like a V8 lope though. Being the cams are .375@200, would that cause a little lope? Also, the idle will sound like it wants to stall, but the RPM never changes. My mod's are in my profile. When i timed the car (replaced chain gears etc), it was perfectly aligned, and per the book. Does everything seem right, or is there something else i should worry about? BTW, no CEL or other issues, drives smooth as a whistle, just the idle.
How long did it take you to get those in the mail?
I'm thinking about getting them as a new set for my head work.
Meantime, I AM running the same profile in my car... an auto...with a crappy lifter bore on the cam pick up sensor side (exhaust).
Using an HO cam tower and lifters on he exhaust side.
Idle is tad rougher but still smooth.
No check engine light.
All good.
I do have other unlrelated issues because of the bore being messed up.
But everything ielse is cool..
-M
Remember....syringes go in the RED waste basket.
Im using stock bore lifters (actually didnt replace them), as for shipping, took about two 1/2 weeks or so, it came from Canada to Indiana, so i understood that. i guess the biggest worry i had was if there was something wrong with the install, took me 3 days by myself (damn waterpump was a PITA cause i left my header on). mastin you mentioned something about the cam pickup sensor on the exhaust, my new cam has that too, they are factory cores ground to that spec, LD9 cams, what does that pickup sensor there for on the exhaust side, since the sensor is on the intake cam carrier?
why would the header need to come off???? i am going to be doing this swap soon just orderd cams so iam just seing what problems i could run into and what was the problem with the water pump ??
Its just easier to get to (dont have to lie under the car for a few hours), make sure to use some sort of sealant to tack the gaskets in place (another reason it took so long, didnt have any). I would recommend having atleast another person helping, my dad came in and helped when he could, which made the reassembly go well.
The HO cam towers have it on the exhaust side.
The 2.4L twin cam towers have it on the intake side.
No big deal, you can use either one if you were using the HO tower.
Basically the one I'm not using is just acting as a hole plug.
I could try to snap a pic if need be.
-M
Remember....syringes go in the RED waste basket.
Emailed the guy i bought the cams from, and he says that The intake duration is almost exactly the same as stock, so the idle should be smooth as stock and that I must have a problem elsewhere. Now im starting to wonder what, everything was lined up etc, dunno what could cause the issue. It runs fine other than the idle, could it be a sensor? I was close to the knock sensor with the waterpump cover assembly, could i have somehow damaged that, or maybe the O2 (knocked it with the wrench)?
Mine does that too.
Acts like it wants to cut off, but no check engine lights or anything.
And like I said, I have th ebent lefter bore.
As long as its not like jumping rpms or whatever you'll be ok.
If you wanted, you could raise the idle a little at the throttle body.
Adjust the little screw.
But it s sounding like everything is ok.
-M
Remember....syringes go in the RED waste basket.
Mastin wrote:If you wanted, you could raise the idle a little at the throttle body.
Adjust the little screw.
The idle speed is controled by the Idle Air Controler (IAC), via the PCM. The IAC is the solinoid located on top of the Throttle Body, it has a plunger in it that moves in and out to control the amount of air going into the motor at idle to keep the preprogramed rpm. If you adjust the screw enough to change the idle speed, then all you've done is go beyond the range of the IAC and you will mostlikely throw a DTC.
Got another email back from the guy i got the cams from, he thinks their might be some sort of vaccum leak. I hear nothing, and the idle RPM is solid according to the tach. Is it possible that a lifter is getting a little stuck or no? Reason im asking is, the guy says smooth stock like idle, and it doesnt have that, which makes me think something may be up.
