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The valley coolant tap to throttle body line and the degas tank are the mystery leaks because of limited visibility. They leak intermittently. You may have to drop the front bottom air duct components to observe the radiator side tanks and the aux water pump. Use of uv dye to locate the leaks...

Try this convenient valve with a barbed end female 1/4 NPT thread with a long output tube to keep to pour back in the tank. instead of the M6 plug. Beats burning fingers.

Thanks for the suggestion!

Is the belt oil soaked with power steering fluid? If the engine is dry free from oil try the Gates belt. There is very little stretch when installing new. I would try to oil soak the radial spring of the tensioner because of possible corrosion. The other issues of exhaust & valve leaking i had...

The part matching from the oem unit was the suggection, which you did. I use crc connector cleaner because of Houston humidity every time when reconnecting. I haven't had any issues with connectors. I found DeoxiT as an excellent cleaner as it does a good job then just cleaning also protecting...

For grins, try DeoxiT D5, on the all the electrical connections from the middle PCM connector to all the tranny electrical connections. You may swap harnesses also. Did you verify the pcm to your 03 ?

Hi, i had my instrument panel light up like a Christmas tree and rough idle, ECT, ete. What I found was the ground wire connect to the inside truck body M6 bolt was loose and dirty. I removed it and wire brushed it & reassembled which stop all warning lamps on. I also learned you get about...

Does the interior lights flicker when the cluster loses power?

Investigate DeoxiT D5 connector cleaner

Hi Guy, when i had my 04 LS repaired in Anniston Al Aamco, the elder Robert told me the 03 LS was a unique year for the transmission control. I would also would talk to Pat Garrett at Level 10 transmission about this issue. Jim at Bob Allen Ford has rebuilt ABS units and pcm also.(913)3812999. I...

Many photos plz!

Can the solenoid pack be tested to identify an issue?

Try adding a dip stick hose to the pan with a quick drain 1/8 npt plug. The pump filter setup is to mount on the ps rack bolts under the rear engine. A Lokar AOD 36" dip stick kit fits well. The dip stick receptacle is 0.8 drill in thick wall pipe. I sent the pan to Pat Garrett at LevelTen...

Thanks for your story on a bad thottle body!

Hi troubled 03 ls owner, please read https://www.rv.com/archive/tranny-filter-tech/ before you decide on any coarse of action.

M6-1 about 20-25mm long amazon

Have any photos ro share?

Did you check the the front lower control bushings for breakage by use of a long bar?

Clarity

The throttle body valley coolant tap long term hose with ds clamp.