Knock right after shifting?

[jfdid]

I spent a couple hours tuning the bird today and it's running VERY well on straight, single gear pulls. But right after I shift, I get ongoing knock until I let off of the gas. This happens from every gear(1st to 2nd, 2nd to 3rd, etc.).

I'm running a drawthrough setup on the MAF-T, mods are listed, and I'm NOT venting my BOV.

Any ideas guys?

 

[UNDISPUTEDDSM]

i can feel your pain......the same situation, i ran an srt4 about a week ago, pulled him but once i shifted into 4th, just picked up tons of knock.....i was still running stock pump, i just switched to a 255, 650 injectors and i'm rewiring the pump soon, so i;ll log the same situation were i switch to see if i still have knock and i'll let you know if that fixed the problem......

 

[dnhieu]

Im no PRO tuner now but......you bring it all the way to redline and their is no knock but as soon as u let off their IS knock? my guess would be loud noises or some kind of vibration in your engine

also how much are you knocking? its hard to believe that you could bring your car to redline with no knock and it all of a sudden knock when the car is loosing rpms.

eclipse talon laser

 

[TurboDSM90]

Im no PRO tuner now but......you bring it all the way to redline and their is no knock but as soon as u let off their IS knock? my guess would be loud noises or some kind of vibration in your engine
.....................

I had an issue with my rear motor mount. I put the wrong bolt in there (a thinner one) and the motor would rock back and forth in between shifts. I put the right bolt in there with a lot of finesse (and a hammer) and it got rid of 90% of my shift knock.

To get completely rid of it was very hard.I took me long nights on some lonely roads, and plenty of launches/shifting hard to get rid of it by tuning. I also put a small copper washer in between the knock sensor and block. this made a big difference also.

So far, so good

 

[wira4]

There is probably not enough time to induce knock in first gear as the rpm goes byvery quickly until you get into higher gears during which there is probably a sufficient build up of heat that leads to knocks. Prehaps you should play with the fuel and timing again to try getting rid of the knocks.

 

[jfdid]

Thanks for the info guys.