I have a 1990 ford ranger xlt 2wd 2.9l v6 that i had bought about 2 months ago that i have had a few little problems with that i need help figureing out how to fix them. To start off i have replaced starter and spark plugs and i have ran oil system cleaner through it andchanged the oil twice i also have pulled the valve covers off and cleaned both sides the push rods and lifters and everything else that i could under the covers. My main problem is is when the truck warms up my oil pressure gauge will go back and forth really fast but it only does it when i slow down or after its gotten even warmer it will do it when idleing i need help to figure out what it is to fix it. Also the more i start the truck the harder it gets to start almost like the battery loses power the more i start it if anyone knows how i can fix this please let me know i need help

 

was your oil gauge like that before you did the things that you did. it mite be your factory oil gauge. I had one that acted weird so I got one from parts store. oil pressure was fine.