California Emissions Junk

[mantis8585]

I also have an 83 4d55t and just had the injectors and the pump rebuilt for $915.00. I used Advanced Diesel Specialist here in Phoenix and the guy did a good job for me.

[4D55 Performance]

I also have an 83 4d55t and just had the injectors and the pump rebuilt for $915.00. I used Advanced Diesel Specialist here in Phoenix and the guy did a good job for me.

So how much of an improvement did you notice with the rebuilt pump and rebuilt injectors? Most notice a huge difference in performance and economy after rebuilding there pump and injectors.

[mantis8585]

I dont know yet, the motor is still being overhauled. I bought this truck in 1000 pieces so I am still putting it all together. I will report back my mpg when I get it running. Hopefully in about 2 weeks or so.

So how much of an improvement did you notice with the rebuilt pump and rebuilt injectors? Most notice a huge difference in performance and economy after rebuilding there pump and injectors.

[mikewarme]

I have a block off plate for both the exhaust manifold and the intake elbow at the turbo to remove all that crap. The 83 california pump also has a full throttle solenoid on the lever which recycles fuel from the return line. This fuel being overly heated also kills the MPG. For this reason when the pump needs a rebuild I always look for federal 83 pumps.

[mikewarme]

I would want to keep the timing on the 83 to around 3 deg. All of these trucks have a timing advance. Its on the top of the IP pump. It was mainly for high altitude.