Problems after holset install

[godfather75]

I just finished installing my new holset hx35, now my car won't rev past 3000 rpms. I did a blt at 20 psi and have found no leaks, I tested my coils there fine, new wires, fuel trims around 100%. What else could I be missing, before my 18g blew it was pulling hard at 20 psi and now I get to 3000 rpms and it misses like crazy. Any help would be greatly appreciated.

 

[richard33]

Instead of regapping the plugs why don't you try new ones as well. Check the coils still, and look into the meth/MAF problems the guy above me is talking about.

Also, if the car is only revving to 3k rpms..well that's why you're only seeing 3-5lbs of boost

 

[jjrock5]

Why don't you throw a 1g MAF back on there and eliminate the Meth for now? You have too many external variables going on. Then once you fix the issue, throw all the "cool" mods back on it.

 

[godfather75]

Problem solved it was a bad coil. I just bought a prosport wideband. I need to get off work early enough to get the bung weld on my down pipe. I also fixed the meth problem my shut off selonoid wiring came loose. Thanks for all the help.

 

[goonie90gsx]

Car fixed itself this morning on the way to work pulled hard at 20 psi of boost. Now on the way home from work back to no acceleration above 3000 rpms. I'm thinking I might have another bad gm maf, this is the 3rd one in two years.

I had the same problem, my inter cooler piping rubbed up against the screen on the maf n messed up the readings i went n got a new maf n it was fine. Also seems like a bad injector i had the same problem when my injector went bad it would misfire really bad when i started to build boost.