[kord]

ok i have a friend who has a 93 and he was wondering if there is something to fix his chugging and white smoke puffing at start, but when its warmed up its fine has anyone else had this problem? and if so what fixed it? /ubbthreads/images/graemlins/confused.gif /ubbthreads/images/graemlins/confused.gif

 

[cdnsarguy]

How many miles on the 93, they are susceptable to valve guide wear which emmits a loud woof woof into the intake if it's an intake valve and the woof goes out the exhaust if it is an exhaust valve. White smoke and chuging could be caused by a burnt or stuck valve too a sign of incomplete combustion. Should do a compression test.....

 

[Dave Haven]

[ QUOTE ]
ok i have a friend who has a 93 and he was wondering if there is something to fix his chugging and white smoke puffing at start, but when its warmed up its fine has anyone else had this problem? and if so what fixed it? /ubbthreads/images/graemlins/confused.gif /ubbthreads/images/graemlins/confused.gif

[/ QUOTE ]If it clears up within 10 seconds or so, he could have a (some) bad glow plug(s).

 

[Silver_Wolf2]

Common problem with the 7.3l IDI. There is a cold start switch which is activated during proper start up procedures that advances the timeing and pushes the accelerator a bit which stops this chugging. Turn the key to on. Push the pedal to the floor, and let go. Do not turn the key back off, but instead wait for the glow plug light, then start. If it still chuggs, then the solinoid is burned out, and needs replacing. They are cheap. You can also jumper a wire from the battery to the solinoid to see if it pops out. If not replace it. Alot of people buy these trucks not knowing about having to depress the pedal to activate the cold start solinoid. Note the solinoid won't activate when the engine is warm, as it is not needed at that point. If it does activate you will notice no chug, but also the RPM's will be higher, around 800-900. If you wait until the motor warms up, you will notice the RPM's drop off to about 600 after warm up of about 5 min. When it does this it is really noticable because the solinoid stops pushing the pedal, and it pops back up. Scared the daylights out of me the first time it happened to me. I didn't expect it, as I was usually driving already when it shuts off, and it poped up and scare the daylights out of me. LOL.