Need help 2002 silverado 4.8 tune

[polarbock]

I have a 2002 Silverado with a 4.8. The motor had a bad rear engine bearing so I got a new motor. It is also a 4.8 I put it in and added the electric fans as a upgrade as well as a ported TB and cold air intake and headers. All the sensors are new Crankshaft position sensor, Camshaft position sensor, throttle body position sensor, ERG valve, and injectors. I was able to tune the vehicle to accept the electric fans and get the truck to start but the biggest issue I'm having now is it now develops a p0200 code. I'm not sure if it has to do with the new injectors that we put in the injectors that were original were working fine well at least for me and I tried to order new ones and they were discontinued so I went with the AC Delco 25317628. They were supposed to be the updated version. Please i need help where on what else i can go to make it run right. I was told that one of my injectors may be misfiring so I went ahead and pulled each one they are all pulling 10 homes so that eliminated the Injectors from being faulty I also checked all the wiring to make sure that they were all getting current when the vehicle is running and I have also made sure they are all getting spark from the spark plug wire. Here is my file 2002silveradoOME.hpt

[RDF1]

You need to make sure the injector connectors are making good connection.
If you still have P0200 you will need to disconnect PCM connectors and do a resistance check from PCM pin of each injector to the fuse that powers that injector.

[gametech]

p0200 is almost always going to be a wiring problem. Since you did e-fans at the same time as the motor swap, I am guessing you had to pull the harness off the ecm and add a pin. I would check that end of the wiring harness first for a bad pin connection at the computer. However, a bad spot in the wiring could be almost anywhere if something was accidentally pinched or pulled too hard during the engine swap.

[2xLS1]

They will all be on the blue PCM connector.

[polarbock]

Thanks I will give it a try first light

[Alvin]

I'm betting a injector isn't plugged in all the way. Outside of that.. there are an absolute ton of counterfeit injectors out right now. Where did you get them from or did I miss that?

[polarbock]

So to answer the last question I got the muffin eBay I checked the resistance on those they are all at 10 ohms. When I check the stock ones six of them say 11 ohms and two of them say 12 ohms when I look up what the resistance is supposed to be it says it's supposed to be 12 so whether I have aftermarket injectors that are showing two ohms less than what's they're supposed to be at according to the manufacturer. I checked and rechecked the connectors and I'm getting power and the correct resistance up top, at the plugins. Once I clear the codes the truck will cycle through two or three startups before the code pops up again.

[gtstorey]

Resistance of the injectors doesn’t really mean anything for this purpose. The odds are probably 95% or higher that they are counterfeit if they are listed as GM injectors on eBay.

[blindsquirrel]

Once I clear the codes the truck will cycle through two or three startups before the code pops up again.

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[polarbock]

So I took out those injectors and got those old ones cleaned up and thankfully I have a test for hanging around I tested them out run some cleaner through them put some new rings and voila truck fired up with no codes the tune has so far worked with the electric fans. Y'all have been very helpful and very infirmative I can't wait for my next project I have another 2002 with a V6 and written a transplant a V8 with a five-speed manual tranny in it.