# 93 Suburban with the Hiccups **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [January 31, 2008, 5:03pm UTC](https://community.cartalk.com/t/93-suburban-with-the-hiccups/10058 "2008-01-31T17:03:57Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![larryb53](https://avatars.discourse-cdn.com/v4/letter/l/dec6dc/32.png) [@larryb53](https://community.cartalk.com/u/larryb53)\ **Post date:** [January 31, 2008, 5:03pm UTC](https://community.cartalk.com/t/93-suburban-with-the-hiccups/10058/1 "2008-01-31T17:03:57Z")
My 93 Chevy Suburban has a baffling case of the hiccups. This is 3/4 ton 4X4 truck with 350 v8 and a throttle body carb. At speeds below 65 the engine purrs and runs great. When I hit 65 mph the engine produces an occassional stutter or hiccup. I have installed new plugs, plug wires, distributor cap and rotor. This seems to have lessened the frequency of hiccups but they still occur. There also seems to be a random quality to this phenomenon. No rhythm or pattern is apparent? Any ideas on this? ---
**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\ **Post date:** [January 31, 2008, 5:16pm UTC](https://community.cartalk.com/t/93-suburban-with-the-hiccups/10058/2 "2008-01-31T17:16:50Z")
Perhaps a weak fuel pump? Worn distributor? ---
**Author:** ![pleasedodgevan](https://avatars.discourse-cdn.com/v4/letter/p/51bf81/32.png) [@pleasedodgevan](https://community.cartalk.com/u/pleasedodgevan)\ **Post date:** [February 1, 2008, 2:51am UTC](https://community.cartalk.com/t/93-suburban-with-the-hiccups/10058/3 "2008-02-01T02:51:34Z")
When there are doubts about ignition I always check the #5 and #7 ignition wires and make sure that they go to the right cylinder and keep them away from each other because crossfires can happen. When the spark from 5 goes to 7 it will cause preignition.