Popping out of intake and exhaust!

[lt1truck]

I just got my ltx swap running on its own but i ran into a problem. Right as i got it to run on its own it ran good, it had good throttle response, no smoke and no codes granted i never had coolant in it nor ran it long enough for it to matter.

When i set up the cooling system and got it all burped i let it idle there for about twenty minutes and thats when the issues started. it started to pop or backfire out of the intake and exhaust when i brought it off idle but once it was up in the 3500-4000 rpm range it would get very responsive and sound good, i also pulled some of the spark plugs out and they looked fouled out. issue two: after i noticed that i shut it down and started checking over everything obvious, and when i checked the oil it smelled heavily like gas and i could also tell by the feel of it. so i obviously have more than one problem here.

I have already tested all the injectors, i pulled vacuum on the FPR and it held good vacuum, new plugs (because the ones in there were questionable to begin with), checked for vacuum leaks, i had none, tomorrow im going to do a compression test and check my fuel pressure. Anything else anybody can think of i would be happy to listen!!

[warnerTA]

try hookin up a wideband.. haha they are not cheap! or easy to install.. BUT very usefull. you might be runnin really rich. it could be way lean. never know. i might be off on this too. someone will come in and continue im sure. good luck man!

[Blubird]

yeah definately sounds like youre running too rich

[lt1truck]

yeah i just got done adjusting the rockers and they were about a half turn too tight so i think that solved my intake backfiring, i changed the oil also and threw in a quart of trans fluid to maybe free things up if i had a stuck ring, but now it seems like its running good, or at least as good it could run with the hotcam and ported heads on a stock tune.

Ill know as soon as i run it for a little longer to see if im still getting fuel in the oil.

Thanks for the advise so far!!!

[lt1truck]

Oh and im also not throwing any codes as of yet but i havent run it long enough to get it into open loop.

[warnerTA]

keep us informed

[Fastbird]

The popping out the intake I don't like. Only thing I've seen that'll do that would be a crossed plug wire, but apparently that's not the case as you say it was running good.

[lt1truck]

i just triple checked the plug wires and their all going to the right cylinders but i did fint a tear in the insulation of plug wire 8 and a torn boot of number 2 but would it really be this much of an issue, and i just checked fuel pressure at idle it 42psi i havent put a load on it cuz of no tabs and it running all weird so.....i dunno!!

[lt1truck]

andi did get a check engine light but i can read the code until later but ill let you guys know as soon as i do