oil pressure gauge drops and stalled. - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-24-2004, 06:11 PM   #11
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Default TP sensor problem

Hi, guys , thanks alot.

I had the problem with TP sensor(throttle positioning sensor), and it often turns 'service engine soon'. Would it be a problem?.
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Old 07-24-2004, 06:24 PM   #12
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It could be related, but I've never seen a bad TPS cause a stall. Usually it'* high or variable idle, and cruise control won't work.

You know you have good oil pressure, so change the sender, and get back to us with the results. We'll take it from there if there'* still problems.
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Old 07-24-2004, 08:37 PM   #13
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The low oil pressure as Damemorder stated does in fact stall the engine as a safety feature. So, if you have oil pressure (mechanically checked) then replace the oil pressure sending unit.
A bad TPS will cause occasional stalling (I know this from experience as I go through a TPS every year and a bit). Clear the codes and run it for a while until the check engine light comes back on then check it again. If it has the same code you will have to check the signal reference (5volts) the signal (0.4 volts or close at idle) and ground from the TPS sensor while connected and running hot. I put a paper clip in from behind the plug (through the rubber seal) into the plug until it contacts the wire connector inside. That way I can get the reading without damaging the wire by poking it. Run it at idle nice and hot while checking it for any wierd spikes in the signal (0.4 volts idle to 4.8 or so volts Wide open throttle (not while running!))
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Old 07-26-2004, 12:59 PM   #14
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Default I replaced the oil pressure sender, but....

I replaced the oil pressure sender today morning, but the gauge is not stable..
Once the engine is warmed up, and whenever I hit the brakes, the gauge drops down.

Any idea ?. ....
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Old 08-01-2004, 08:16 PM   #15
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Default Re: I replaced the oil pressure sender, but....

Quote:
Originally Posted by Hojekang
I replaced the oil pressure sender today morning, but the gauge is not stable..
Once the engine is warmed up, and whenever I hit the brakes, the gauge drops down.

Any idea ?. ....
i have that same prob did u drop the oil pan??
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