Low pressure all of a sudden

[mijohnst]

Well, the first time I just cleaned the MAF several times. I had purchased a brand new one, but I was hoping that cleaning the old one would save some money. So it did start after I put the brand new one in.

Thankfully, I haven't done anything with the wire harness. I was just mentioning that I had put in a new stereo, and connected that to the harness. But I did not cut wires.

 

[mijohnst]

Now I'm starting to think...could it be an ignition security problem because I have no radio installed at the moment? When I first installed my new stereo last week, it wouldn't start or it would roll over once and then die. It's doing that again exactly the same way. The Crutchfield tech told me to unplug the battery for about 5 minutes and after that, it started working again. I've got the battery unplugged now and I'll run back at lunch and see what it does.

 

[yukonkink03]

I'm late to this thread but had a similar experience with my 03 Yukon. The guy I bought it from swore on Lucas oil treatment and said to always use it. I don't care for that stuff so when I changed the oil I used Mobil-1 5-30 High mileage. Not long afterwards my oil pressure went down and I thought my motor was toast. My mechanic buddy told me to change the oil filter as he was positive the syn oil had loosened up some gunk. He was right. No problems anymore. Back to normal oil pressure.

 

[mijohnst]

I'm late to this thread but had a similar experience with my 03 Yukon. The guy I bought it from swore on Lucas oil treatment and said to always use it. I don't care for that stuff so when I changed the oil I used Mobil-1 5-30 High mileage. Not long afterwards my oil pressure went down and I thought my motor was toast. My mechanic buddy told me to change the oil filter as he was positive the syn oil had loosened up some gunk. He was right. No problems anymore. Back to normal oil pressure.

Never too late! Thanks or the input. I'm glad that your engine was toast. That's crossed my mind a few times through this whole proces.

 

[OR VietVet]

"I'm glad that your engine was toast." I know you meant WASN'T TOAST but man that was funny when I read it.

 

[George B]

"I'm glad that your engine was toast." I know you meant WASN'T TOAST but man that was funny when I read it.

One time I wanted a new engine and was wishing the current one was toast.....

 

[OR VietVet]

One time I wanted a new engine and was wishing the current one was toast.....

Oh, been there done that. Nothing like wanting something badly and having to wait till the old one actually does finally fail. Oh happy days!

 

[Joseph Garcia]

Oh, been there done that. Nothing like wanting something badly and having to wait till the old one actually does finally fail. Oh happy days!

Well, that's much better than being 350 miles from home out in the middle of nowhere, and your engine throws a rod bearing..... Oh, not so happy days.....

 

[OR VietVet]

Well, that's much better than being 350 miles from home out in the middle of nowhere, and your engine throws a rod bearing..... Oh, not so happy days.....

Have not been there but one time I was on a highway trip in Mo. and was about 100 miles from home. At high rpm I could keep my old beater Chevy pickup running but low speeds it wanted to die. I could hear a major vacuum leak. I pulled alongside the shoulder and looked at the old 350 engine that was bare bones, thank God. I had an intake gasket blown out. I found some old Anco wiper blade long boxes. I git some tools out and took off the intake. I salvaged the front and rear seals as best I could and had a beat up old tube of sealer there that I was able to use. I took a ball peen hammer and tapped around the sharp edges of the intake holes and made a pair of intake gaskets out of the wiper long boxes. Used a little sealer to help hold in place and installed the intake. Ran like crap at first because I had the carb upside down at one time during the process. I had also used a large flat blade screwdriver as a scraper. Got home on a wing and a prayer. Bought a new 88 Chevy 4x4 pickup the next day. This all took place in late May and was a nice sunny mild day.

Joseph if you had an engine blow 350 miles away from home, that truly sucks. I got lucky.

 

[Tonyrodz]

Have not been there but one time I was on a highway trip in Mo. and was about 100 miles from home. At high rpm I could keep my old beater Chevy pickup running but low speeds it wanted to die. I could hear a major vacuum leak. I pulled alongside the shoulder and looked at the old 350 engine that was bare bones, thank God. I had an intake gasket blown out. I found some old Anco wiper blade long boxes. I git some tools out and took off the intake. I salvaged the front and rear seals as best I could and had a beat up old tube of sealer there that I was able to use. I took a ball peen hammer and tapped around the sharp edges of the intake holes and made a pair of intake gaskets out of the wiper long boxes. Used a little sealer to help hold in place and installed the intake. Ran like crap at first because I had the carb upside down at one time during the process. I had also used a large flat blade screwdriver as a scraper. Got home on a wing and a prayer. Bought a new 88 Chevy 4x4 pickup the next day. This all took place in late May and was a nice sunny mild day.

Joseph if you had an engine blow 350 miles away from home, that truly sucks. I got lucky.

McGyver style