The truck shows 230k miles, but everything has been replaced/ upgraded.

Transmission and engine rebuilt within the past couple years. I think the only thing on the motor I haven't replaced are the fuel injectors.

I'm getting lots of misfires at high rpm highway speeds. Also, 1494, but there are no leaks in the hoses, and I've ordered a new leak detection switch.

I just had the fuel sync and timing checked and adjusted (although there is no scanner in 100 miles).


***Should I replace the injectors? And if so, what size should I put on a 5.2L with a cam and other mods?

Any recommendations of any that won't break the bank?

Thanks.

edit:PS. I'm about to get a custom tune, and I will be installing a wideband o2 sensor for logging. I'm looking at these:

 

List your mods and then will be able to point you in the right direction. After I installed EQ monster heads and cam I had misfire issues. I switched to 4 hole injectors and the misfire disappeared.

 

Thanks.
I got antsy last night and ordered some bosh four hole injectors. I'm at my wits end with this motor. I'm hoping between the injectors, new stall converter, and custom tuning I ordered I will see something better than stock out of this motor.


Here is what I already modded:
-aluminum plenum, kegger mod, throtlebody mod, CAI.
-Odessa aftermarket heads, compcam 20-744-9 camshaft, mopar performance valve springs (dcc-5249464) with valve retainers dcc-4452032.

-short headers with complete 2.5" dual exhaust with t-pipe connection, no cats, unrestricted magnaflow mufflers #10426
-35" tires with 4:56 gear, fox shocks 2.0 w/res
-new 8.2 wires, rotor, and plugs

 

them heads come with stiffer valve spring so why the mp springs?mp springs/retainers are pricey.got pics of all them parts.care to share.

 

Sorry, no pics. I'm not very knowledgeable with motors,, but I remember being advised to upgrade the springs due to the cam I bought. No pics of the rebuild, as my mechanic here in Honduras did it for me. I seemed to have poured endless money into this truck, and have not seen the power.

also, I have to give a props to Odessa, as they were kind enough to waived my core charge due to my location. It would have been difficult to ship my old heads to them from here.