I have the issue from a few threads ago regarding stumbling trying to maintain 75mph on the highway with partial throttle.
The check engine light never came on but to start the diagnostics I bought an OBD1 code reader(21.99 at Checker) and the KOEO
, Stored Memory and KOER
test all came back with No errors. Now I think I should focus on Fuel.
Question for this thread:
Where do I find Fuel delivery troubleshooting tips?
I have researched what I can but don't seem to find much on Fuel troubleshooting.
Can anyone point me to where I need to go to find this?
Thanks in advance for any help on this.
Here's the history:
1988 Ranger 2.9L 5spdMitsubishi, 4x4, Manual Tcase and hubs, ext cab, at least 175K miles, owned about 6 months.
Last week I cut off the stupid 1foot long cherry bomb and replaced with an oem style muffler to quiet it down, and new air filter. Today I pulled the all of the spark plugs and they looked great and consistent to eachother so I put them back in without replacing any of them. Fuel filter replaced (again) yesterday.
Traced through as much of the wiring that I could get to looking for a worn spot for potential short but found nothing.