Code 32 Back again

[mudbog42]

Well, just a few weeks ago, I was getting a code 32 so I replaced the EGR valve and the solenoid and it went away. Well this past weekend I put some headers on the truck and now its back, but only at steady cruising speeds?

I was wondering what could be causing this. Its an 89 TBI 350 w/ headers and true duals. Could it be that with the exhaust setup I now have, there is not enough backpressure for the EGR??? If so, how could I fix that?

Thanks for any help in advance.

Mudbog42

 

[Jason4x4]

Could be plugged ports in the intake, and with the more free flowing exhaust it isn't as effective.

 

[odin]

X2 on the plugged ports.

 

[mudbog42]

Could be plugged ports in the intake, and with the more free flowing exhaust it isn't as effective.

I was afraid that might be it...

Any other options to try before removing the intake manifold

 

[Slapperbar]

Run Seafoam thru it?

 

[apache]

The last go round for smoggin up to 1974 vehicles here in Calif failed our 74 K10. I pulled the intake and to literally chisel the carbon from the EGR ports to get them open. Prior to pulling the intake I pulled the EGR and dumped carb cleaner into the EGR hole where it sat for week and it was still rock hard.