Engine/Transmission (1994 - 1998) 2500 RPM Stumble

[mullady76]

Ever since I had the 191 DV's and 4k GSK installed the motor has a slight miss at 2500 rpm. It only happens when I put my foot to the floor with od locked out. The motor pulls hard then stumbles for a split second then it pulls like a rocket. Could the GSk be out of adjustment? Overflow valve maybe? Anyone have any ideas.



Thanks,

Sean

 

[Reb.B]

advance your timing to 15. 5 or 16 and u'll lose the stumble.

 

[mullady76]

I set the timing at about 16 degrees. The guys at the shop said to bump it to about 17.

 

[Jim Fulmer]

Sounds like something to tinker with, with the timing sounds like you fine, if you get to a real over fueled situation 18 degrees works better if your not afraid of kicking the head gasket, once you get a good one and an O-Ring 20 degrees is a world of difference.



Jim

 

[mullady76]

I dont kmow if this is true, but I heard that the #6 plate does not work well with the GSK. Could this be the problem, if so which plate will work better and add some HP.

 

[Jim Fulmer]

Not sure about that, doesn't sound right to me, shame your not here I would put my #4 in... . that puppy will work with that combo, nice cut back on top for EGT control... so to speak.



Jim





TST will swap those plates out for you... exchange!

 

[mullady76]

I might have to try a #4 plate, but first I'll have to work out some of the bugs in the truck.

 

[Andy Redmond]

You will like the # 10 or # 4 cam plates with your set up, if you tow a lot the number 4 may not work out so well.



Good luck,Andy