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Hummer H3For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.
Engine sound normal at startup/running/operating temp? What's the oil pressure reading at idle?
yes everything is normal and drives normal but when it hot and after I drive and stop at idle then it start happening . I don’t have oil pressure gauge to check it at idle. How can I do that? Or where can I get it to see what’s reading at idle ?
Hi NFS, one thought ... when you changed the sensor, did you check if there is a screen filter inside the hole where it goes? If it has one you should pull that out an make sure it's clean or replaced. This could reduce flow on idle.
FYI - I'm working on solving the opposite issue, sensor harness was torn off, and I'm getting no reading that sensor is missing.
hmmm I have no idea it have a screen I looked up some videos and didn’t see a screen. Was I suppose to have a screen in there ?
yes everything is normal and drives normal but when it hot and after I drive and stop at idle then it start happening . I don’t have oil pressure gauge to check it at idle. How can I do that? Or where can I get it to see what’s reading at idle ?
Originally Posted by hummerz
Got it, low oil pressure ONLY at idle. OPS is working, yet there is a huge pressure loss at idle. Internal problem(oil pump/seals) engine needs 1 psi oil pressure per 100rpms. @ idle it should be min 6-7psi, 5psi or lower will set the (((OIL LIGHT))). STOP throwing parts at it and check oil pressure at idle to verify! https://youtu.be/btsrCATwqxA
I ordered one thank you I will update once I get it and test it but see what’s weird is why it only happen at idle when it’s like very hot outside like today for example was a cool day and it didn’t do it …. But when it’s hot it does it… I don’t understand it’s so confusing
hmmm I have no idea it have a screen I looked up some videos and didn’t see a screen. Was I suppose to have a screen in there ?
May be my bad. I checked the manual for the 3.7 l, didn't see a screen so I may be confusing that with the V8 engine I recently worked on. In any case I'll be changing my sensor next week and let you know if I see a screen in there. Fingers crossed on success in your trouble shooting.
May be my bad. I checked the manual for the 3.7 l, didn't see a screen so I may be confusing that with the V8 engine I recently worked on. In any case I'll be changing my sensor next week and let you know if I see a screen in there. Fingers crossed on success in your trouble shooting.
Mine is the 3.7 too but it looks like the one with 3 prongs are the one that come with screen ours is only 2 prongs but let me know if there is one. The oil pressure kit should arrive this Friday I will test it and see what it says .also I forgot what socket size do you use to take off that sensor ?
Also needs to be 6 sided. 12 will not work. Might be best to get an actual oil pressure switch socket, but I'm sure you could get it with a regular deep socket.
So the weather been cool lately and it have not been doing it . Also found out that my hummer does not have oil pressure filter and doesn’t take one. I already got the oil pressure kit I am waiting for a hot day that it does it so I can plug it in and read the pressure . So I will update soon
