RobertISaar Posted June 7, 2008 Report Posted June 7, 2008 my fiances grand prix has been sitting for a while and as long as shes had it its had a few quirks and shes never had them checked out and i figured the collective knowledge of w-body.com would know before anybody else. speedometer, tach, (possibly) oil pressure gauge are all doubled. reads about 40-50 psi oil pressure at idle even after about 5 minutes of warming up. what does this sound like? its a 3.1 auto, if that helps. and the SES light is on, probably the car thinking it has an unussualy high idle... battery is dead so i have to jump it with my monte every time it gets started. and she just told me the low fuel light is on all the time Quote
EviLette Posted June 7, 2008 Report Posted June 7, 2008 40-50psi is high? I'm amazed my motor hasn't blown up then... I sit around 70 psi.. the ONLY time it ever drops low is when it needs an oil change and the motor's hot... I've got the 3.1 too. Different boat than you, my tach works. My temp gauge doesn't. Quote
RobertISaar Posted June 7, 2008 Author Report Posted June 7, 2008 according to the repair manual it should have 15psi minimum so i assumed it would be 20-25 psi at max at idle. i mean, hell my el camino with a ridiculously cammed 355 makes 65-70 psi hot at idle(bounces between 600-1100 RPM... gotta love holley spreadbore carbs...) but thats because i want it to(i was always told have 10 psi for every 1000 RPM you plan on running it to. ive never watched the guage when it was at 6500 but thats when it sounded like/felt like valve float, so i stop there). Quote
digitaloutsider Posted June 7, 2008 Report Posted June 7, 2008 40-50psi is high? I'm amazed my motor hasn't blown up then... I sit around 70 psi.. the ONLY time it ever drops low is when it needs an oil change and the motor's hot... I've got the 3.1 too. Different boat than you, my tach works. My temp gauge doesn't. The oil pressure gauges on the cars are BS, don't use them to judge oil pressure. And who cares if the pressure is high? There's a reason why there's no red hash mark on the cluster. Anyway, the oil pump is driven off the cam. It can't possibly over-pressurize the system. Anyway, mullet1, your cluster is shot. Replace it. Quote
grandprixnyc Posted June 7, 2008 Report Posted June 7, 2008 The oil pressure gauges on the cars are BS, don't use them to judge oil pressure. And who cares if the pressure is high? There's a reason why there's no red hash mark on the cluster. Anyway, the oil pump is driven off the cam. It can't possibly over-pressurize the system. Anyway, mullet1, your cluster is shot. Replace it. my oil pressure gauge maxes out at 80 all the time. I just ignore it. Quote
RobertISaar Posted June 8, 2008 Author Report Posted June 8, 2008 40-50psi is high? I'm amazed my motor hasn't blown up then... I sit around 70 psi.. the ONLY time it ever drops low is when it needs an oil change and the motor's hot... I've got the 3.1 too. Different boat than you, my tach works. My temp gauge doesn't. The oil pressure gauges on the cars are BS, don't use them to judge oil pressure. And who cares if the pressure is high? There's a reason why there's no red hash mark on the cluster. Anyway, the oil pump is driven off the cam. It can't possibly over-pressurize the system. Anyway, mullet1, your cluster is shot. Replace it. is that the only possible explaination or just really, really likely? voltmeter seems really accurate: 14 volts after it gets jumped. but the cluster has to get replaced as one piece, correct? any good sources where i could find one cheap... other than the J/Y? Quote
slick Posted June 8, 2008 Report Posted June 8, 2008 40-50psi is high? I'm amazed my motor hasn't blown up then... I sit around 70 psi.. the ONLY time it ever drops low is when it needs an oil change and the motor's hot... I've got the 3.1 too. Different boat than you, my tach works. My temp gauge doesn't. The oil pressure gauges on the cars are BS, don't use them to judge oil pressure. And who cares if the pressure is high? There's a reason why there's no red hash mark on the cluster. Anyway, the oil pump is driven off the cam. It can't possibly over-pressurize the system. Anyway, mullet1, your cluster is shot. Replace it. is that the only possible explaination or just really, really likely? voltmeter seems really accurate: 14 volts after it gets jumped. but the cluster has to get replaced as one piece, correct? any good sources where i could find one cheap... other than the J/Y? Other than the JY? Ebay or on here. Yeah, you will read the correct voltage, but it's the current that the cluster receives, and then produces the correct signal via the needle you see on your cluster. Basically, you have no signal issues, it's just that your cluster fucked. Quote
RobertISaar Posted June 8, 2008 Author Report Posted June 8, 2008 what years are interchangable? oldest one i can find on ebay right now is a 94? original one has oil pressure/tach/speedo/water temp/voltmeter/fuel level Quote
MonteCarloDude Posted June 8, 2008 Report Posted June 8, 2008 what years are interchangable? oldest one i can find on ebay right now is a 94? original one has oil pressure/tach/speedo/water temp/voltmeter/fuel level 94 is OBD 1.5, it SHOULD work though, but i could be wrong. Quote
RobertISaar Posted June 8, 2008 Author Report Posted June 8, 2008 just found some from 92-93... any problem with those working? Quote
rockfangd Posted June 8, 2008 Report Posted June 8, 2008 if i can put a ub3 in my 94 cutlass it should be able to be done. and you cant possible have too much oil pressure. the more the better New cluster should fix those problems Quote
digitaloutsider Posted June 8, 2008 Report Posted June 8, 2008 what years are interchangable? oldest one i can find on ebay right now is a 94? original one has oil pressure/tach/speedo/water temp/voltmeter/fuel level 94 is OBD 1.5, it SHOULD work though, but i could be wrong. '94 is a completely new dashboard. 90-93 is directly interchangeable, 88-89 will work with minor harness modifications. Quote
rockfangd Posted June 8, 2008 Report Posted June 8, 2008 thats right. the cutlass didnt change till 95 but the GP changed to the more round and slim dash Quote
1988GPSE Posted June 8, 2008 Report Posted June 8, 2008 x2 on the cluster bein bad my car has ate 2 digital cluster. Quote
RobertISaar Posted January 5, 2009 Author Report Posted January 5, 2009 its been awhile but from what i understand the 90-93 gp clusters will work but what about other w cars are they the same or is this a gp specific part? Quote
IRONDOG442 Posted January 5, 2009 Report Posted January 5, 2009 The answer to your problem probably has something to do with the car being 19 years old. Or can be found somewhere between fuck and all! Quote
Lumineer Posted January 5, 2009 Report Posted January 5, 2009 I have an older 3800, but my oil pressure usually stays within the 40s. Quote
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