stumble while excellerating - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tom · 05-23-2005, 03:42 AM

My truck started to stumble while speeding up about a week ago. Its gotten worse over time. When I was changing the timing I got shocked, so I got a new cap and rotor. Also found my fuel pressure dropping to 2psi at idle when it was fully hot. Fixed that with some header wrap around the exhaust where the electric fuel pump is mounted. Also tried dropping the timing down 4 degrees to 10 initial, no help. Does anyone have any ideas? The carb is a 6 month old 1405, brand new 14x5" K&N, R42LTS plugs, MSD 6a box and blaster 2, muncie M20 and 3.73 gears. Wires are also new and not touching the headers anywhere.

05-23-2005, 03:42 AM	#1
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,763	stumble while excellerating My truck started to stumble while speeding up about a week ago. Its gotten worse over time. When I was changing the timing I got shocked, so I got a new cap and rotor. Also found my fuel pressure dropping to 2psi at idle when it was fully hot. Fixed that with some header wrap around the exhaust where the electric fuel pump is mounted. Also tried dropping the timing down 4 degrees to 10 initial, no help. Does anyone have any ideas? The carb is a 6 month old 1405, brand new 14x5" K&N, R42LTS plugs, MSD 6a box and blaster 2, muncie M20 and 3.73 gears. Wires are also new and not touching the headers anywhere. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. Last edited by Tom; 05-23-2005 at 03:43 AM.



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