So if you were following my build I was having issues with my car not starting. I got that to work by messing around with the crank sensor. Now that is behind me I got the car started and it is running rough. Here is the video of the car started.


http://s128.photobucket.com/albums/p...CarStarted.flv

Notice in video the car just shut off, I did not shut it off.

I am currently getting a P0017 (crank/cam correlation) and a high idle code. cant remember the code.

I have put the cam sensor housing shaft in 3 different ways and it started those 3 positions and the code still came up.

I am currently running -2 degrees of timing at ide and the car wont idle normal.

Here are some pictures of my cam timing for reference.

Timed, motor out:

Cam gear timed


Crank gear


Motor in car: The #1 is at TDC in this picture.

Intake


Exhaust



After just 20-30 seconds of running the valve cover is very warm. After a couple minutes of running it was hot where you didnt want to touch for long.

I am not pulling any timing. ECT seem normal.

Can the cam angle sensor make the car run like **** and not make it idle correct? Also I have not done a crank re learn can that be a factor? What could be causing the high idle?

Just let me know what you think. All help is appreciated.

Thanks!

 

what rpm is your car idling at?

 

If you needed to do a crank relearn you would be throwing a code for it.

 

Last I started it was running at about 1800 when started, then 2000, then went down to about 1500.

Really? That is weird since I took the crank out and it is a new sensor.

 

that's pretty high of an idle even after warming up. i'd check the cam setup again.

 

I know when i swaped PCMS it threw a P0315 - crankshaft position system not learned

 

How did the car run?

I think the high idle is P0507

how the hell is it possible that I dont need a relearn when the crank was taken out.. Weird

 

I'm sure this is something you checked but just to make sure, have you checked the idle settings in hptuners? You can adjust your idle to whatever you need it to be, however if you are commanding 750-850 and seeing something much higher then you obviously have another issue that is not tuning related.

Like I said, I'm sure it's something you have thought of, but just something I thought I would toss out for you

 

Yah I just looked at it to make sure. The idle is set to 1000. Thanks for the idea though.

 

Is the idle set higher for colder starts? For example when certain cars are started with coolant temps below X the car will idler higher, then when above X it will fall back down to the normal idle.

Either way it's probably not tuning related, but just tossing it out there. I will go through some of my buddies and tell them to look into this issue and see if they have any feedback.

 

Yah but it is not nearly close to 2000. I just change the shaft location again and the car smelled rich. Still ran like hell and still running -2 advance timing. Does the timing seem off?

Also someone was saying that the exhaust cam looks a bit off. May be valve/cam timing. i dont see how but who knows

 

sounds like you may have a vacuum leak. extra air entering the intake system behind the throttle body increasing the idle and leaning out the motor..

 

Doesnt a vaccum leak or something that bring unmetered air into the system usual produce a code? Great suggestion I will def look.

 

It seemed to idle fine, can you post up a log?

 

What's the vac gauge doing at idle? When my timing was off it read around 15hg moving up and down a bit. Sounded lopey too

 

I have not directed my attention to that. I didnt get to work on it this weekend but I will today. I am thinking I jumped a tooth when I tensions the chain or something. Suck! I know all my vac lines are tight so it cant be a leak.

Well I am cammed so it may be a little more lopey than stock.. Well I hope!

 

SCcobaltSS - What is your boost gauge reading while at idle? You should be looking for roughly -20 at idle from my experience.

 

I will check when I get home. It is not a steady idle so I dont see it being -20, its going to jump. I will still check.

 

Well I re timed the car yesterday. It was off. I did it without pulling the cover. Re positioned the cam sensor and started her up. After two clicks of the starter she fired. Idled WAY better than before but it still has a jumpy idle (ranges from 1000-1300 RPM) I am going to replace all the vacuum lines and re tune the timing for the cams.

I can press on the gas slightly and get the idle up to 1200 and it stays but once I take my foot off it'll jump again. I hope its still not one tooth off. I dont want to pull the cover.

No Codes Either

 

Update: Vacuum lines did not change the idle. Still jumpy. Ran it for about 4 minutes and no codes. The timing still seems off. It is running at -1 degree advance at idle. Vacuum was jumping from -8 to -10.

 

Well I put on a stock TB, took it off my friends cobalt ss, idk if its from the cams or what but we were playing around with the tune last night and got it to go from -5 to +10 thru the idle. It sounded sweet!

Now at the end of the tune we got it to run at a really good idle, sounded cammed, and then at 3 minutes the car starts to surge/hunting. Weird thing is the trims are pretty bad when its running right i am talking -5 to -15 . Then about a 30 seconds before the idle starts to get shitty the trims go from -3 to +3 and when the idle is shitty they stay there. It is very weird.

So if I give it a little rev of the engine it falls below idle then goes to the good idle for about 10-15 seconds. Then get shitty again.. Weird car. I think I am going to time it one more time.

Here is a video (just for sound) of the idle.

http://s128.photobucket.com/albums/p...ent=cammed.flv

 

Well I change the cam tuning a bit and tried starting her. It was a little rough in the beginning, damn cam/crank correlation, then it started to idle! I got the car to run for about 13 minutes or so and it was not hunting or surging. So I turned it off to fix the trims a bit go to start it. Cranks but no start. Give it a little throttle and started (gotta change the cam sensor around till it fires right away) but this time it went for about 20 seconds and started to fall on its face. Try a little different timing and change the cams a tad. Tried to start and it wont. I am going to wait till it cools down and switch the sensor. It is progress.