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Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

jumping oil gauge ??

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Old 08-09-2010, 10:24 PM
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Default jumping oil gauge ??
on my 94 6.5 i changed the oil this evening it goes from 40 down to real low pressure is this a serious pb ? or may it be a gauge cluster pb ?? i give it gas and it goes back up any ideas ?
 
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Old 08-09-2010, 10:57 PM
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How low is real low? It could be a serious problem but I doubt it. Most likely if it drops real low I would say its the oil sending unit.
 
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Old 08-10-2010, 01:28 PM
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all morning it ran at 40 but this after noon after it got hot it ran in between the redline and 40 and when i stop it goes down to the first white line close to red what do u think ever seen or messed with this ?
 
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Old 08-10-2010, 07:12 PM
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I would get a mechanical gauge on it.
 
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Old 08-10-2010, 07:17 PM
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dealer said when oil pump goes out that the comp would shut the truck down so no harm would be done is this true ever heard this ????
 
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Old 08-10-2010, 08:51 PM
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If the truck loses oil pressure it will shut of the lift pump but most likely the engine will still run.
 
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Old 08-13-2010, 11:59 PM
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any ideas why volt gauge in dash jumps from 14 down to 9 stays there and then jumps back to 14 when driving around on a 94 chev 2500 6.5 turbo diesel
 
Last edited by steve45; 08-14-2010 at 12:03 AM.
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