Mine has the update software barcode on PCM.Straight from the dealer. So they were doing it in 1999 from the factory. Recently got my truck running smoother... had a plug wire running next to injector7 and 8. And switched to NGK plugs for the first time. Was like night and day in performance, especially off idle jumpiness. Seems to easy.

 

As you I had the prob before the plenum repair and put in new plugs whick were NGK before the fix and after the fix...Well since then I've gone back to factory plugs (copper) and nothing But glad to hear it!! I'm still buying parts and tools so we'll see how it goes...

 

Bumping for other's new to forums to quickly find. Lets keep this thread alive and making progress..

This weekend I took my truck through my paw-paw in law's pond.. about 4 ft deep plus another 2 ft deep in mud or more.. truck went through it well.. with no issues..

Needless to say.. shudder is still there..

 

I had this problem from 10-15. Today I replaced my pre cat o2 sensor and it hasn't done it since..

 

Do keep us posted if you make any head way onthis man..


I'm going through a life changing event.. but once it's done it will free up alot of extra cash per month.. so being this is our companies busy season I do not have the time work on my truck.. I'm thinking about taking it to a friend and paying him (Cert. Mech) to replace the motor mounts; and rebuild the top end..

 

Hey Jon,
My propeller shaft is a one pc shaft..I changed both cross joints and no positive results..I've changed tires, also with no positive results..that would leave 'rear axle pitch line runout' But that would be last on my list of possibilities. Reason being is my CEL is still on and the code is P0308 (# 8 mis) and we all know what the mis will cause. (not saying 100%) that's the problem but it's near the top of the list. As I've said in the past if I turn the OD off that results in a higher RPM from through 35-55 mph range which also increases the hydraulic pressure.
We'll see, I have most of the parts but still need a new cyl head, EM studs, HB remover and a few other little things such as the loot to get um..

 

Update on my end; I have another thread going on; the reverse drone; doesnt wanna go when still not to op temp when cooler/cold..

Dad is thinking the Pump.. maybee the pump is week.. off idle.. IDK.. just kinda putting 2 and 2 together.

 

Reverse band may be slipping too...