lumbee1
Native American
UPDATE: The engine stuttering/hiccupping was actually the transmission cancelling lockup. The fix was to adjust the brake sensor switch.
Driving home from a camping trip in September, I noticed my engine started to stutter and hiccup at approximately 70mph after driving for 10 to 15 miles. I was concerned but it seemed to be fine at lower speeds. The engine was rebuilt and reinstalled in Dec 2021 and only has 5K on the build. After doing some recent work on the engine, I found some crispy broken wires on the main engine harness so I purchased a new one and installed it. I haven't driven it on the highway after the work with the new harness since Sept but after 15+ miles at 70 to 80mph, the engine started stuttering and hiccuping again, just like before.
The stutter is an almost imperceptible jolt and the first few times it happened I thought there was an unseen bump in the road. When this happens, the engine ever so slightly drops power and picks right back up again. I'm not sure if this is a fueling issue (fuel pump or injector) or a spark issue (igniter). I have a slight oil leak (yeah I know) and the tach seems to bounce randomly sometimes. New brake booster, no CEL, and ABS/LSPV have been removed.
Parts replaced or installed so far to address the problem:
As stated, the stuttering was happening before all of this was installed.
I have a spare igniter that I'm going to install tomorrow but I'm out of ideas.
Driving home from a camping trip in September, I noticed my engine started to stutter and hiccup at approximately 70mph after driving for 10 to 15 miles. I was concerned but it seemed to be fine at lower speeds. The engine was rebuilt and reinstalled in Dec 2021 and only has 5K on the build. After doing some recent work on the engine, I found some crispy broken wires on the main engine harness so I purchased a new one and installed it. I haven't driven it on the highway after the work with the new harness since Sept but after 15+ miles at 70 to 80mph, the engine started stuttering and hiccuping again, just like before.
The stutter is an almost imperceptible jolt and the first few times it happened I thought there was an unseen bump in the road. When this happens, the engine ever so slightly drops power and picks right back up again. I'm not sure if this is a fueling issue (fuel pump or injector) or a spark issue (igniter). I have a slight oil leak (yeah I know) and the tach seems to bounce randomly sometimes. New brake booster, no CEL, and ABS/LSPV have been removed.
Parts replaced or installed so far to address the problem:
- New colder plugs
- New vacuum lines
- Dielectric grease on plug boots
- New distributor o-ring.
- New radiator
- New engine harness
- Adjusted TPS
- Adjusted accelerator cable
- Adjusted throttle cable
- Added trans fluid
- New coolant and distilled water
- TRD Supercharger
As stated, the stuttering was happening before all of this was installed.
I have a spare igniter that I'm going to install tomorrow but I'm out of ideas.
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