92 Lesabre - Coolant Leak and Losing Fuel Pressure while off? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-18-2013, 11:08 PM   #1
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Exclamation 92 Lesabre - Coolant Leak and Losing Fuel Pressure while off?

Hey everyone! Thanks so much for reading this and offering help! I absolutely love my 92 Lesabre. Its been so reliable for the 8 years that I drove it all through high school and now all through college. I have had a couple issues come up that I'm hoping to get some advice on. We've tried to take good care of this car, hopefully to get many many more miles on it!
Currently its at 199,000. A lot of has been highway miles.

First of all -- noticed a coolant leak. Its slow (maybe about 1/3 of the coolant tank over the course of a month). Its pooling up on top of the engine in the wells under the spark plugs. Its only in the well on the drivers side of the engine. I think its running down the side too, but its kinda just dirty, so its hard to tell (I live on gravel roads.) I don't think it ever makes it to ground. I followed the lines around, couldn't find an obvious place it was coming out, and really have no idea how its getting into that well on top of the engine.

I read that intake manifolds tend to leak on the 3800 II, but didn't see much about the older cars doing that.

Second - After the car is turned off, the fuel pressure drops, So the next time I go to start it, I can't get it going without giving it some gas. Unless, I turn the key, wait about 3-5 seconds for the fuel pressure to build again, and then it will start fine.

Not sure whats causing this - possibly the pressure regulator, or maybe just my fuel pump is on its way out???


SO -- All in all, my main questions, are either of these two problems serious (as in, I need to seek car mechanic now), or can I just wait them out? Is the coolant leak fixable DIY? How expensive would these fixes be?
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Old 09-18-2013, 11:31 PM   #2
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^^^ When I say spark plugs, I really mean injectors. My bad.
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Old 09-19-2013, 07:20 AM   #3
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fuel sounds like regulator, try taking the vacuum line loose and smell the port for gas if so its ruptured and bad.

leak you will have to clean the engine and narrow it down, the newer ones leak because of the stupid plastic gaskets, not sure what the series one has but could be bad due to age, cant tell until you find exactly were its from
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