Intermittent Stalling/Dying While Otherwise Driving Fine...Restarts, Drives, Randomly Dies Again.

[AnotherOldJeepGuy]

1 hour ago, 89 MJ said:

How do all of your connectors for various sensors look? Any chance you’re losing connection somewhere?

They all look connected and I don't see any that look damaged.  But maybe I'll disconnect and reconnect them just to see if anything changes.  Back when Radio Shack existed they sold a contact cleaner spray that worked wonders on TV and CB tuners, wish I had a can of that stuff to clean the connections as well.

[GonzoTheGreat]

Contact cleaner is still readily available at most hardware stores and should be used on any connector that doesn’t look new inside. 
 

also, did you verify that all those bolts on the bottom of the exhaust manifold are tight? Or just that they exist?

[89 MJ]

50 minutes ago, AnotherOldJeepGuy said:

They all look connected and I don't see any that look damaged.  But maybe I'll disconnect and reconnect them just to see if anything changes.  Back when Radio Shack existed they sold a contact cleaner spray that worked wonders on TV and CB tuners, wish I had a can of that stuff to clean the connections as well.

I have my doubts it will fix it, but we can hope so!

[AnotherOldJeepGuy]

4 hours ago, GonzoTheGreat said:

Contact cleaner is still readily available at most hardware stores and should be used on any connector that doesn’t look new inside. 
 

also, did you verify that all those bolts on the bottom of the exhaust manifold are tight? Or just that they exist?

I was able to visually verify they exist and don't look loose.  Trying to get to them is still on the list but so far I have not been able to get to them with a wrench.. can't see them from the top to aim the wrench, and so far I can't reach them from underneath!

 

So since for the other areas the water test was very effective in locating leaks on that end, and also in showing afterwards that tightening closed the leaks at those points, I am for the moment assuming that since the water test from below doesn't show any leaks (ie rpm does not change when sprayed), they are no leaks there.  I know that is not the same as being 100% sure with a wrench, but it seems to be good evidence that they are not leaking based on how well it worked in other locations.  Does that seem logical? 

[pizzaman09]

On 2/17/2025 at 6:42 PM, AnotherOldJeepGuy said:

They all look connected and I don't see any that look damaged.  But maybe I'll disconnect and reconnect them just to see if anything changes.  Back when Radio Shack existed they sold a contact cleaner spray that worked wonders on TV and CB tuners, wish I had a can of that stuff to clean the connections as well.

I think the product you are looking for is named DeoxIT.  There are a couple of different varieties so you may want to do a bit of research.

[AnotherOldJeepGuy]

Will do.  I did stop at ACE HW today and they said they do normally carry something with the name contact cleaner, but were out of stock.  We are in for a deep freeze here in  North Texas for the next few days, so the search will resume after it warms up a bit.

[AnotherOldJeepGuy]

DeoxIT seems to have lots of good reviews.  Also ran across CRC 05103 QD Electronic Cleaner that also has good reviews.  Both claim to dry quickly without leaving residue and will not harm plastics.  So will probably get one or the other and give it a try.