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Old 06-24-2005, 11:46 PM   #1
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Default Car not running right after VS Cam install

Hiyas, I had a VS cam installed last night, and as of now my car is running really weird. It stutters when I gas it, it will go down to 500 rpm when I brake to turn or stop and then die sometimes, and sometimes it will shift at 3500-4000 rpms at WOT. Also at about 55-60 it will stutter really bad if I go WOT sometimes. It threw a code for a throttle position sensor so we replaced that and it still isn't working. Here is what we did to my car last night:

VS Cam shaft
104 plugs
new timing chain
Intense Stage 1 PCM
105 springs
steel retainers
My car already had 3" exhaust, rice pipe CAI, shift kit, 180 tstat

After we reset the TPS code (and did a CASE learn) with the Intense PCM it immediatly threw another code. We didn't check out this code because we thought it might be the PCM so we put the stocker back in. On the way home it started doing it again but no SES light. I drove about 180 miles home on the freeway with the stock PCM. Also some more stuff it dit, when the engine slows down my oil pressure will drop, and driving at 70-80mph my DIC says my average MPG is anywhere from 14-18 MPG (it used to read 23-28 before the cam install, and It seemed to eat more gas on the way home). When it stutters it feels like it is bouncing off the rev limiter. Any solutions? A vacuum leak (where?) or maybe the MAF or something? Thanks, any help would be appreciated.

Because I forgot last night:
When we first ran the car after the install it ran ok, but on the freeway the tach started acting up, where it wouldn't work right (it looked like it was slipping or something) then just all out quit and stayed at 0. It was like this for about 10 more minutes until we got back and pulled down the street, then it started working again. Since then however it hasn't maxed out during the startup self-test like all the other gauges do. And i'd also like to add that the car runs "alright" (although not as strong as before) until it warms up, then it starts doing the hesitation/stutter (feels like it is bouncing off the rev limiter at 3.5k rpm but not shifting when it does this) and acting up.

EDIT: Added some more information
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Old 06-25-2005, 12:01 AM   #2
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Got codes?

Cam timing off?
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Old 06-25-2005, 12:04 AM   #3
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Quote:
Originally Posted by jwikoff99
Got codes?

Cam timing off?
The only code it threw was the TPS with the intense pcm (running on stock and no codes after 180 miles) and dunno if timing is off, I don't have a scantool, and my mechanic is 180 miles away and leaving town tomorrow :(.
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Old 06-25-2005, 11:50 AM   #4
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Oy yeah im retarded, this is a 2000 SSEi.
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Old 06-25-2005, 02:05 PM   #5
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Sounds like the cam timing is off, or it could be the plugs you put in are gapped too big or one or more of them isn't firing properly, or something like that. Check the easy things first. Pull the plugs and make sure all of them look like they have been firing properly. Sounds the most like cam timing off though...

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Old 06-25-2005, 03:13 PM   #6
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If it is the cam timing, what do you have to do to get it fixed?
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Old 06-26-2005, 01:40 PM   #7
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Quote:
Originally Posted by Habibus
If it is the cam timing, what do you have to do to get it fixed?
Take the front cover off the engine and line up the sprockets properly.

Shawn
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Old 06-26-2005, 03:25 PM   #8
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Sounds like PCM problems. The computer brain needs time to learn that is has a new heart.
The symptoms are indicative of timing problems. Did a competent person do the install?

The studdering like bouncing off the rev limiter occured with mine after a pulley change once cause the timing advance was set a little too high in the PCM.
That is the computer protecting the engine, like it should.
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Old 06-26-2005, 03:36 PM   #9
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Quote:
Originally Posted by 2000SilverBullet
Sounds like PCM problems. The computer brain needs time to learn that is has a new heart.
The symptoms are indicative of timing problems. Did a competent person do the install?

The studdering like bouncing off the rev limiter occured with mine after a pulley change once cause the timing advance was set a little too high in the PCM.
That is the computer protecting the engine, like it should.
Yeah, that'* why we took out the Intense PCM and put back in the stock one, which is doing the same thing. Although I haven't done a CASE learn with the stock PCM (I did do one with the intense one, but it didn't help it). And the person that did my install has done alot of L67s (first bonneville though). I know that they were having trouble lining up the cam/timing chain, but i'm sure they put it on right. Also it only does it after it'* been warmed up, or started after it'* already warm. If it'* warm and I shut the engine off, then restart it, it will still do it. I'm taking it to a shop tomorrow to see what they can find out about it though, i'll keep you all informed.
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Old 06-27-2005, 12:47 AM   #10
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It doesn't really sound too much like a PCM issue because first off he swapped to a stock PCM, and also our PCM'* don't typically have a problem when you put a cam in, espeically a VS cam...that cam requires no computer work because its pretty mild. (although its a good idea to get shift points and limiters raised and all that good stuff) We put my dads XP cam in his car in like March or something (don't remember exactly when, sometime around then) and we still haven't touched the PCM.

You don't have to do a case learn on a PCM that has already been in the car. You can remove it and reinstall it all you want, once its had a case learn on your car it doesn't need one anymore.

Shawn
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