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Hey everyone, my 08 megacab started surging after a head gasket was replaced, seems to be worse when hot out or going up long hills, just keeps cutting out briefly until temp goes down, got a programmer but I turn it off and never use it, just had the fass fuel pump replaced, still does it, any ideas?

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Yes, I had to basically make him go drive it up the hill to see it was still surging, he said he didn't know other than to start " throwing injectors at it", he did the fass fuel pump, I put a solid fuel rail bolt in, next I'm gonna try putting a new back pressure sensor in and cleaning the line

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Take the solid fuel rail bolt out, it will cause long term issues. 

 

Have the crossover tubes been retorqued?

 

Do you have anything to monitor load, rail pressure (desired and actual), boost?

Edited by AH64ID
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