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Backfiring after cam install!!!!!please help!!!!

   
Old Mar 10, 2009 | 07:26 AM
  #51  
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Make sure all your rockers on tight. I had poor performance after cam and went months not knowing what it was. Finally when I was going to smaller cam the mechanic noticed he had left a rocker loose. Made a huge difference and I kept the cam.
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Old Mar 11, 2009 | 05:47 PM
  #52  
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Originally Posted by budhayes3
Holy cow, you're having a baby tonight! Congratulations!

Don't worry about the truck right now, you're going to be a buzy, sleep deprived daddy for a while!
Thanks. Healthy baby girl. 7lbs 7oz, 19.3in long. Just go home from the hospital. Sorry guys.

Originally Posted by Modern_Muscle
make sure you also got them in 100%

my last heads had a couple bad threads in them, and did the same thing.
backfiring, sputtering, and such.
It was leaking compression around the plugs.

RIght now Im sputtering once in a while...but I just put my heads/cam in and dont have it tuned yet...
I will check and make sure in the next couple days. Probably going to be really busy.
Originally Posted by 04herod
i think just from working on the truck with u and the fact that chris likes 2 rig things up and he did do the swap from the v6 to the v8. but kept the v6 harness and just cut n 2 it an made it work i feel u got a wiring problem.
True that!!!
Originally Posted by dlt76028
i'm telling you... o2s and or fuel pump.
I just checked and no codes are being thrown.
Originally Posted by 04herod
its got new o2s n it. the pump was working just fine b4 the cam swap but that is sumthing 2 check.
Thanks buddy
Originally Posted by hirdlej
What did you cranking compression end up being? I still am not convinced the cam is installed right If you do have it lined up, we need to know the cranking compression. Your cam could be ground wrong too. Did you degree it when you installed it?
I still haven't checked the compression. Do you know what they are supposed to be at? And the proper way to do it. And no, I did not degree it.
Originally Posted by tarinitup
Make sure all your rockers on tight. I had poor performance after cam and went months not knowing what it was. Finally when I was going to smaller cam the mechanic noticed he had left a rocker loose. Made a huge difference and I kept the cam.
Rockers are perfect. Thats what I thought too. All good and tight at 22ft/lbs...
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Old Mar 11, 2009 | 05:48 PM
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I am going to go get some new plugs and check the compression this weekend. I have a lot of homework to catch up on first. I will let you guys know ASAP!!!
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Old Mar 15, 2009 | 08:12 PM
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just checked the compression cly#1. 170 cly#2. 185 cly#3. 170 cly#4.165 cly#5. 155 cly#6. 165 cly#7. 175 cly#8. 175
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Old Mar 15, 2009 | 10:02 PM
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the cam. is it a custom grind? or used cam? reason i ask is cause i had backfire issues also before fro ma custom grind cam, come to find out the cam was junk just after a few miles of use!! oinly difference is i didnt have backfire issues at idle more at 1/4 to wide open, also had the bogging down issues, not saying its the cam just letting ya know i went through something simular
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Old Mar 16, 2009 | 08:48 AM
  #56  
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What would be the best way to find this out? Just put my stock one back in there? And it is a used custom grind. The guy came and put just a basic tune in it and it seems like it has more power but still nowhere near enough. Not even close to stock. Its not doing the bogging down at 1/4 throttle anymore either. I think I'm going to put the stock one back in and see what happens.
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Old Mar 16, 2009 | 08:49 AM
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I think that would be my best bet, right?
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Old Mar 16, 2009 | 09:40 AM
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Originally Posted by Jtbrewer19
I think that would be my best bet, right?
yea put your stock one back in. if that fixes it, dont buy used cams anymore.
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Old Mar 16, 2009 | 04:26 PM
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I just pulled everything out and my harmonic balancer bolt had a lot of metal on it. I'm not sure if it was off the bolt or the crank. I am about to go down to the dealership and get another bolt. I will keep everyone updated.
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Old Mar 16, 2009 | 04:42 PM
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you can always cam doctor the cam as well, but being a custom grind, and used, I would think you should degree it.

Is there any timing advance ground into the grind?

Mind sharing the specs?
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