frist off i like to say nice site, and lots of info. frist off i have a 93 F-150 4x4
with the 5.8liter. the truck is new to me had it a week. i know i got the shaft now when i bought it. guy lied alot and didnt tell me full truth of all wahts wrong.

got a few problems and whould like to get some input.

ok i have a after market oil press gauge in truck now cause the stock one was looking low and i wanted to get a real reading, well when truck is cold it got about 50psi but after it warms up good it drops to like 20, and if you drive it
down raod it slowy get lower. after i got back from test drive it was showing 0psi so i shut it down fast. about 15min later started it back up and it was around 30psi then got ot like 15psi, i didnt drive it this time.

some told me ot change oil pump and tube and screen. but iv all ways seen
mostly chevys, when it does this its time for bearings.

please any one give input on this.


problem number 2 this what i went threw before the frist problem. sorry it not in order lol.

when i drove truck home it ran ok, the truck been sitting about a year when i bought it, so i figured a good tune up needed to be done. next morning tried to start truck and it whouldnt start, at times it fire spit but not run. messed around alittle. unpluged tps and it started right up pluged it back it and it still ran turned it off and started it again. when down road and it ****ed really hard in every gear. and wanted ot idel high. got on it a little when it hit 3000rpms it cut off, and whould not start again. unpluged tbs again after a bit it started, got it back home. whent to auto parts place got new tps and iac, replaced them and truck started right up ideled like it should whent for test drive tranny was shifting smooth again. when i got back home thats when i noticed oil press on 0/ cut truck off, 3 hours later whent ot start it for a few just ot move it out drive way, and it did not want ot start agan finaly it started and i moved it. thats where im at now.


so for the oil press problem should i start looking a new motor, or try new oil pump like i was told.

and 2 what whould cause truck to act like that, after i replaced them senores and it ran 100 times better, then not want ot run at all again

 

well, bub it sounds like we are in the same boat with no pattles, see how far you get with a new oil pump, pickup screen, and bearings. if you go this route make sure to get the little plastic things with the oil pan gasket. otherwise it is a real pain in the @$$.

 

try a new oil pump first.. if the problems persist.. new engine.. I had an '86 Bronco with a 302 that had a similar problem with low/no oil pressure.. after it lost oil pressure totally.. I replaced the pump and it was okay.. I used a high pressure/high volume oil pump..also, no FRAM filters.. noticed oil pressure was a little higher when using a different brand of oil filter.. BTW.. do the lifters tick when the oil pressure is down? maybe your gauge is not working properly..

 

whats up thanks for the reply. and the gauge is brand new, and i think it reading right, cause when it does drop to around 20psi on tha gauge you can start to hear the lifters here and there. and when it was on 0psi on the gauge the little bit it was the lifters got prettie loud right before i **** the truck off

 

I'm glad to see I'm not the only one that avoids using the PH8A Fram oil filter

 

what did you pay for the truck and other than the motor what kind of condition is the truck in?? what model tranny is in the truck?? replace the oil pump like everyone else said, i always get the high volume/high pressure melling pumps. does the truck smoke at all?? do a compression test, that will give you an idea on the wear of the motor. also how many miles on the motor?? if it doesn't smoke and compression test is good, i think the oil pump will fix problems. other than that you may just have a bad sensor somewhere with regards to the starting problem.

 

i bought the truck for 1200, it is a 93 and as for tranny i dont know it is a auto
it does have over drive. and is 4 wheel drive. the interor of the truck is all most ment. only thing is a few stains on carpet. the truck it self has 195,000 miles on it. but the motor witch i have the paper work guy i bought it from gave me from a ford dealer from when he put a new lonf block in truck. and he said the new motor has about 60,000 miles on it. the motor dont smoke at all.

 

For $1200 that's a pretty good buy, even if you have to work some gremlims out of the truck. oil pump shouldn't be bad at 60k, but a pump is not expensive and it can't hurt to replace it. you never know what kind of maintenance was done on the truck in the past, i know people that go 20k before changing their oil. if i did treated my vehicle like that it would die in a couple of months. i would also replace plugs, wires, cap, rotor, tranny fluid and filter. also flush cooling system, and replace thermostat. these are cheap preventive maintenance issues that are neglected most of the time but will improve the performance and durability of your "NEW" truck. and don't forget to change the oil in the axles and transfer case, tcase should have atf in it.

 

after sitting for a year the oil pickup screen is clogged.

put that and a new oil pump in for starters.

 

thanks for the reply. yea i agree 1200 wasnt that bad, jsut dont wana put a new motor in it. worked on it to day some, seems ot be running good now and starts every time. all so changed oil. i put 4qts oil and 2qts lucas oil treat ment. started truck and i had 65psi of oil pressure, and let it run for along time and when it got hot it had about 42psi. but the thing is i drove it down raod and you you push the gas down a little you can see the oil press droping, it got down to 20psi today and stop. to where other night it hit 0psi.
i know its a band aid. jsut trying ot figure out if the pump worth doing or just liik for a new short block.

as for plugs wires and rotor cap and button that tomm to do list LOL

 

changed oil. i put 4qts oil and 2qts lucas oil treat ment. started truck and i had 65psi of oil pressure, and let it run for along time and when it got hot it had about 42psi. but the thing is i drove it down raod and you you push the gas down a little you can see the oil press droping, it got down to 20psi today and stop. to where other night it hit 0psi.
i know its a band aid. jsut trying ot figure out if its the oil pump or bearings.


with what i told you it doing you think it chould be oil pump and screen?

 

it is what i look at first.

 

does the engine have alot of Blow-by? (stinky thinned out oil, finding oil in the air cleaner) my bronco did..it had HORRIBLE blowby.. i guess me changing the oil every 1500 miles kept that engine running as long as it did.. had a rod knock when i bought it.. it ran for a good 35-40K like that. engine finally blew the #7 rod out of the side of the oil pan..i guess the trip to North Dakota from Arizona and back again while towing my 88 Ranger finished it off as it died 3 months later..replaced it with a fresh 302, and 2 years later some jerk made a left turn infront of me and it got totaled.. still have the new engine with 10K on it in the garage..
The oil pump should not be going out at only 60K unless they re-used the old one when they rebuilt/installed your engine..or he lied to you and it has like 260K on it...... if well cared for a 351W will last a long time..my 90 F250's 351W has 170K on it and runs perfectly..

 

thanks for the reply. i dont know much about the truck i jsut got it monday.
he told me somethings but have found alot more wrong. the main thing that bothers me is the oil press droping so much. like i said when i frist got it the stock oil press gauge read low, but iv never trust them kind of gauges. so next day i put in a new gauge that i trust. and when it finaly warmed up to temp the oil press was like 20psi, drove it down raod just a little ways and by time i got in drvie way again and parked it was reading 0psi. so to day just ot see what happen i did a band aid. draind oil but is 4qts of 20/50 and 2 qts of lucas oil treat ment. iv used lucas for years good stuff. and thinck as mud lol.
after that i started the truck and i got 65psi most it has had. let it idel for about a hour and it never got below 40psi. took it down road and came back it was like 25psi witch is better than 0psi. but the odd thing is when you hit the gas driveing the oil pressur goes down, i know with 60,xxx miles it should be fine. but again he chould have lied ot me and the motor might have 195,xxx miles on it. i dont know.

ppl telling me to change pump and screen. but it jsut seems liek a bearing problem to me. too much clerence and when oil thins out after it gets out it loses pressur.

as far as blow by i havent seen no signs of it. truck dont smoke at all either. runs good now that i got it running right and it starts now. jsut hte OIL press is what bugs me.

been looking around and found if it comes to it i can get a long block for 1000. i might go that way, and that motor will have a warnty