no power

[1stgen1stgen]

Hi everyone new hear so let's see if I can stump you guys cuz I know I am at this point. Let's start at the beginning I bought a 1990 2wd parts truck from my uncle it was in a accident rear ended not bad he bought it for some body parts I got the rest. Got it home fired it up noticed it had a bad shake tried adj the valves got a little better but still didn't run good so I pulled the motor put it on my run stand and preceded to pull it apart and what did I find bad exhaust valves and crack head so with that being said I started buying parts it now has a brand new head valves 60lb over springs stock injectors out of my brother's truck heat grid delete 3" cross over tube GDS 60mm wheel and housing BD 16cm exhaust housing m@h M3 pin 366 gov spring fuel screw turned in to the collar all new seals cleaned polished painted ran good on the stand put a getrag np205 combo behind it set down in my frame off reto 1975 dodge club cab 4x4 and go for my fist ride in it and was I not impressed no power no rolling coal no and the only boost I really get is in 3rd gear grab 4rd and nothing it just bog's out and u haft to back to 3rd I double checked all my work i have 12v at the pump check the star wheel 2 turns from bottom checked to make sure the pin was coming out against the fuel cone check for boost leaks checked the line from the head to the AFC housing nothing so some new ideas would be great cuz that 440 six pack in the corner of the shop is looking really good right now lol

[oldestof11]

A few things...

Welcome!

Use some punctuation. I had a very hard time reading it. Hard time reading = no interest in reading or lots of confusion.

Do you have an EGT gauge?

Sounds like a boost leak.

[1stgen1stgen]

Sorry I'm just trying to get to the bottom of what's going on! And yes I have a egt gauge I've seen it hit a 1050 tops. I do know wen you start to get into boost in socond gear it nose's over and falls on its self. I did see 25 pounds of boost in 3rd with just a hint of smoke so I'm not thinking its a boost leak but maybe a fuel issue. Oh I forgot to put in the list of things I did put on a low pressure piston lift pump and the big fleetgaurd fuel filter. Wen driving it seems to hold 14psi of fuel pressure.

[oldestof11]

Check your head to injection pump line. Those can crack and not supply the AFC with enough air pressure to push down on the pin.

[Remps]

X2. Had almost identical symptoms once, turned out to be afc line fitting and/or o ring. Half roll black tape later, full power thru all the gears, no nosediving. Mine dived so hard i nose bunted the steering wheel, i pulled over immediately afterward and taped the crap out of it, and it worked.

[1stgen1stgen]

It is all brand new I drilled and tapped the top of the AFC housing and installed 1/8 npt to flare fittings in both the head and the top of the AFC housing and ran a -3 braided line between the two. I did go back and made sure it was all clear and snug. Question is the throttle indexing maybe not right spot I did install it back to stock location. The reason I ask is I seen that some of the 1st gen guys are running one to two splines past the stock mark

[RCCUMMINS89]

Paint your fuel pin.

[Remps]

Did you pressure test the line and afc separately? Maybe the diaphragm rubber has a pinhole, or is leaking where it mates to the fuel pin. Could test drive it without the afc spring, then you'd get full fuel, afc leak or not.

[1stgen1stgen]

So tonight I did double check the AFC diaphragm with compressed air it seems to work like it should I heard it click up and down. I did move the throttle linkages up one hole on the throttle shaft bracket. Turned in the smoke screen screw flush with the nut and turned back the max throttle stop 4 turns . After I checked everything and did my adjustments I took it out for a drive. It seem to do a lot better but it still don't get into the turbo soon enough it has good top end power I did see 30psi tonight. So question is the main fuel screw not turned in far enough? It is a non intercooled pump on stock intercooled injectors. The reason I ask is the collar on the main fuel screw was right up against the lock not so I couldn't turn it in very far. So should I cut the collar and start cranking on it?

[oldestof11]

Oh geez. YES!!!

[1stgen1stgen]

OK thanks for the input I'll cut that collar and turn up the heat lol . So one more question any ideal on the injunction pump losing prime prime wen u let it set for more then a day.