96 chevy truck engine change

[Fixitup]

Have a friend with a 96 chevy 5 speed manual. He removed the original 305 and built an older 350 30 over and a bigger cam. He kept the original fuel injection from the 305. Engine starts and idles great but has no power. Any ideas where I might go to fix this issue.

 

[1998_K1500_Sub]

Have a friend with a 96 chevy 5 speed manual. He removed the original 305 and built an older 350 30 over and a bigger cam. He kept the original fuel injection from the 305. Engine starts and idles great but has no power. Any ideas where I might go to fix this issue.

Same ECU and configuration (no "tune")?

 

[letitsnow]

How is he running the crank sensor? What type of distributor is in it? Fuel pressure?

 

[cubandeathgrip]

No power?
When you hit the gas does it stumble or does it drive down the road slow?

 

[Silverado1994]

I was wondering if the crank sensor got swapped over as well but then again it starts and idles. As has been mentioned above has the PCM been reprogrammed/ tuned?

 

[Donald Mitchell]

305 Injectors?

 

[PlayingWithTBI]

305 Injectors?

That was my 1st thought but, IDK if Vortec injectors are different between the 2 engines? I do know they are different in TBIs

 

[1998_K1500_Sub]

IDK if Vortec injectors are different between the 2 engines

RockAuto shows the same p/ns for the 5.0 and 5.7 engines for...

- the spider injector (AUTOLINE 169708) and

- the MFI injector (ACDELCO 2173245)

 

[Fixitup]

I was wondering if the crank sensor got swapped over as well but then again it starts and idles. As has been mentioned above has the PCM been reprogrammed/ tuned?

Everyone says there isn't anyone that can program 96 and later to the 350 engine. Thought we had found a place that could write a new program for ecm but didn't work out

 

[Silverado1994]

Everyone says there isn't anyone that can program 96 and later to the 350 engine. Thought we had found a place that could write a new program for ecm but didn't work out

That doesn't sound right. There's a program/ tune for most anything out there. Surprised to hear that.