Idle's really high after low oil pressure and SES light comes on!!! LOST
10-31-2009, 03:08 PM
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Idle's really high after low oil pressure and SES light comes on!!! LOST Ok so my oil pressure drops after extreme accelaration and then the service engine light came on and then the car idled at about 2500 even at a complete stop, weirded me out because this has never happened before. Even in park it stay's high as hell. Normally when I start the car it sits about 750-800. Mad tuner tuned the PCM for my new 355 setup.....Not sure why the hell this would do this but would the computer have something to do with this since the light came on and it thought it had no oil pressure. I know I need to do a mechanical oil pressure gauge which I am doing. Just waitng for it to show up. When I Install my new one will I just dosconnect my stock sending unit behind the intake so the computer apparently wont read it as being faulty. Something is up with the this freak show of a car! Thanks steve
Last edited by 94BlueZ28; 10-31-2009 at 06:23 PM.
11-01-2009, 12:57 AM
#3
my bet is on vac leak and the mass air flow is freaking out throwing the code
and if your oil press dropped at high rpm that generally means you sucked the pan dry/pickup tube fell off or you just fried the bearings but if it still runs normalish ie no grinding knocking or other such noises your bearings have not spun yet so you should be ok on that
is it a stock oil pump?
O and check your oil level!!!!! seems stupid but it happens more often then you think
and if your oil press dropped at high rpm that generally means you sucked the pan dry/pickup tube fell off or you just fried the bearings but if it still runs normalish ie no grinding knocking or other such noises your bearings have not spun yet so you should be ok on that
is it a stock oil pump?
O and check your oil level!!!!! seems stupid but it happens more often then you think
11-01-2009, 12:42 PM
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my bet is on vac leak and the mass air flow is freaking out throwing the code
and if your oil press dropped at high rpm that generally means you sucked the pan dry/pickup tube fell off or you just fried the bearings but if it still runs normalish ie no grinding knocking or other such noises your bearings have not spun yet so you should be ok on that
is it a stock oil pump?
O and check your oil level!!!!! seems stupid but it happens more often then you think
and if your oil press dropped at high rpm that generally means you sucked the pan dry/pickup tube fell off or you just fried the bearings but if it still runs normalish ie no grinding knocking or other such noises your bearings have not spun yet so you should be ok on that
is it a stock oil pump?
O and check your oil level!!!!! seems stupid but it happens more often then you think
11-01-2009, 03:21 PM
#5
first of all the oil pressure sensor has absolutely NOTHING to do with a check engine light only a check gages light which sends no information to the PCM when you disconnect it it will just sit at 0 and you do not need to unplug it to check it with a manual gage the pcm has no idea its even there
with the evap lines and stuff you capped yes that would cause a high idle but I'm not sure it would cause it to be as extreme as your experiencing
the pickup might be installed to high causing it to run out of oil it can suck in but would still show full on the dip one way to troubleshoot that is to put extra oil in it don't know how much extra you can put in it before its to full but I'd imagine an extra quart would be ok then drive it like you stole it and see if it still does it
is the pump a high volume????
yes it could show good pressure with a pick up tube that fell of at low rpm it happened to somebody on one of the forums I forget which but if its welded then I hope it didn't fall off
with the evap lines and stuff you capped yes that would cause a high idle but I'm not sure it would cause it to be as extreme as your experiencing
the pickup might be installed to high causing it to run out of oil it can suck in but would still show full on the dip one way to troubleshoot that is to put extra oil in it don't know how much extra you can put in it before its to full but I'd imagine an extra quart would be ok then drive it like you stole it and see if it still does it
is the pump a high volume????
yes it could show good pressure with a pick up tube that fell of at low rpm it happened to somebody on one of the forums I forget which but if its welded then I hope it didn't fall off
11-01-2009, 07:33 PM
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I talked to the machinist before I got home the other day for like 45 minutes and he said that it was a melling pump but wasn't the HV! He explained to me some stuff about the pump and pros and cons of both and he said that he has seen thousand hp motors running normal oil pumps! He stated that clearances where not an issue by any means. They have every thing to the thousands of an inch or some **** which was with bearings and all that good stuff! I can get the exact measurement for the depth of the oil pump pickup from them if this helps, He did tell me but I forgot, it was 3 weeks ago I talked to them when I was in texas. Good to be home but of course a car that sits for a month always seems to have issues when you go back to fire it later....At least mines does. Hell my red top battery was low and I had to jump the bitch. Should of known that was a sign right off the bat, lol!
Ok so wait do I not want the evap lines capped? I just capped them yesterday after looking under the hood again. Everything looks good....I pretty much pulled that whole damn box contraption right out of the passenger side firewall, having a few little things there as far as vacuum line. I figured it was all for that **** that was gone. So I may have abigger issue not knowing what the hell is gone, ****!!!!It has to be the damn gauge tripping ballskies! Everything is brand new for christ sake, lol! **** does go wrong though. Ken and Rob, the machinist told me that my bearings where hardend race bearings and that there was no way in hell that they where shot.....Not sure at this point other than to install the new gauge and then to fire it up and take it for a ride and see what happens! Where do you all suggest to install it! I'm thinking the plug right above the oil filter! Not sure I can get to my stock sending unit bullshit because my forearms are to big, I would have to remove the intake to think about getting to it! All advice is greatful, thanks guys!
Ok so wait do I not want the evap lines capped? I just capped them yesterday after looking under the hood again. Everything looks good....I pretty much pulled that whole damn box contraption right out of the passenger side firewall, having a few little things there as far as vacuum line. I figured it was all for that **** that was gone. So I may have abigger issue not knowing what the hell is gone, ****!!!!It has to be the damn gauge tripping ballskies! Everything is brand new for christ sake, lol! **** does go wrong though. Ken and Rob, the machinist told me that my bearings where hardend race bearings and that there was no way in hell that they where shot.....Not sure at this point other than to install the new gauge and then to fire it up and take it for a ride and see what happens! Where do you all suggest to install it! I'm thinking the plug right above the oil filter! Not sure I can get to my stock sending unit bullshit because my forearms are to big, I would have to remove the intake to think about getting to it! All advice is greatful, thanks guys!
11-01-2009, 08:06 PM
#7
when I asked about a HV pump I was not referring that u need one its just that you are more prone to suck the pan dry with a hv with a stock pan since its only what 4.5 quarts
even if they say that its at the pickups at the proper depth doesn't mean is perfectly flat or set right no matter how good a builder is something will go wrong sometime just saying
its just that the only reason you should ever loose pressure at high rpm is bad bearings(which is probably not your problem) pickup to high /fell off or pan got sucked dry
yes you want the evap lines capped I kinda worded it weird
if you install it above the oil filter it will show slightly higher but that is the easy place to go and will work fine
even if they say that its at the pickups at the proper depth doesn't mean is perfectly flat or set right no matter how good a builder is something will go wrong sometime just saying
its just that the only reason you should ever loose pressure at high rpm is bad bearings(which is probably not your problem) pickup to high /fell off or pan got sucked dry
yes you want the evap lines capped I kinda worded it weird
if you install it above the oil filter it will show slightly higher but that is the easy place to go and will work fine
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11-01-2009, 09:10 PM
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when I asked about a HV pump I was not referring that u need one its just that you are more prone to suck the pan dry with a hv with a stock pan since its only what 4.5 quarts
even if they say that its at the pickups at the proper depth doesn't mean is perfectly flat or set right no matter how good a builder is something will go wrong sometime just saying
its just that the only reason you should ever loose pressure at high rpm is bad bearings(which is probably not your problem) pickup to high /fell off or pan got sucked dry
yes you want the evap lines capped I kinda worded it weird
if you install it above the oil filter it will show slightly higher but that is the easy place to go and will work fine
even if they say that its at the pickups at the proper depth doesn't mean is perfectly flat or set right no matter how good a builder is something will go wrong sometime just saying
its just that the only reason you should ever loose pressure at high rpm is bad bearings(which is probably not your problem) pickup to high /fell off or pan got sucked dry
yes you want the evap lines capped I kinda worded it weird
if you install it above the oil filter it will show slightly higher but that is the easy place to go and will work fine
