View Full Version : oil pressure
03-05-2006, 04:32 PM
has anyone else had a problem with there oil pressure guage wagging back and forth? im thinking a bad ground but i dunno it wagged, and now wehn i let it idle the oil pressure guage goes to nothing and the check engine light comes on... did i eff it up or?? its an 87 f250 with a 300 6
03-05-2006, 05:14 PM
sounds like the pump could be on its last leg or the oil pick up could be clogged good luck[cheers]
03-05-2006, 05:15 PM
when i rev it to about 1200 it has good pressure
03-05-2006, 05:37 PM
ive noticed alot of the 87-91 fords have mangled dash clusters... mine doesnt read oil prsr...gas over 1/4tank. my buddys got a 90 150 his dont read gas or pressure.. i no a few others whos trucks read no oil pressure but it werks fine.. theres gotta be a malfunction in those years i think..[cheers]
03-05-2006, 05:43 PM
well, if it is just the gadge then that is one less thing to fix 
03-05-2006, 07:43 PM
i hope its just the guage, any way to tell other then that guage? replace the sender??
03-05-2006, 07:46 PM
get a mechanical guage and test it before you drive it cause it wont last long if there is too low oil pressure.
03-05-2006, 07:51 PM
I bet its jsut messed from trev frying your electircal... stupid...
03-05-2006, 08:06 PM
WHOO!!! Chirs signed up
03-05-2006, 08:07 PM
well boyzen if i keep it above 1200 its in the normal range
03-05-2006, 08:08 PM
just turn ur idle up.. that'll fix it[f]
03-05-2006, 08:11 PM
hha brandon... im not even gonna ask
03-06-2006, 07:55 PM
put nail through pedal into the floor & forget it
03-06-2006, 08:30 PM
Checking with a mech gauge is the first thing.
I had the same problem in my old '68 Chev, 292 - 6 cyl. Put a new high volume oil pump in & it ran for years.
My '80 F250 with a 400M does the same thing, been like that for 2 years already, just too lazy to put another pump in. I just don't idle it for long.
03-07-2006, 07:21 PM
my oil pressure was shittty in my 89 F250..changed the sending unit...perfect oil pressure, driving to work one day it started doing the same thing, check engine ligth and everything, next day guage reads fine and has since....My fuel guage like to jump sometimes, and my alt. rarely works....These trucks do have fucked guages, im just gunna put in a 3 cluster with the improtant ones and good to go
03-07-2006, 10:09 PM
thansk 89 ford, ill do a mechanical test then replace the sending unit.. how much is a new one?
03-07-2006, 10:15 PM
buy a chevy gavin and then no worries....had a older ford did same thing and just ignored it and drove it for 4yrs like that........[stoned]
03-07-2006, 10:16 PM
hhaha shut it sparky, ill never lower myself to buy a chev... and 4 yrs eh haha im just waiting til i buld my 351.... and its gonna be efi.. eff carbs hah
Ford gauges are 5V
there is a trouble prone voltage regulator that feeds 5V to the gauges
Ford used the same nasty little IPVR (instrument panel voltage regulator) for something like 20yrs
I am not saying you have good oil pressure, but if a mechanical gauge says it is good I would look at the IPVR.
I bought one from Lordco a few weeks ago for under $20, most people have never heard of them.
03-08-2006, 12:07 AM
also mechanical guages at crappy tire are like 29.99 and up with oil pressure and water temp and volts but i would suggest getting copper line rather than useing the poly line the kits come with just my .02
03-08-2006, 09:18 PM
my oil pressure sending unit was like 15 bucks, and they changed the design of the new one you get to give a more accurate reading or some shit like that....
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