4.3 lacks pickup

[DetroitMuscle]

I dont mind, if it pertains to this why not add to it?



Anyways, i pulled and capped the vacuum supply TO the EGR, drove it around, not sure if i noticed it, I will be driving it today to check it out. Timing wont be this weekend, I got to get my new house ready to move into in 3 weeks.

What does a bad converter sound like, not the cat the torque converter. I got a Hissing when I accelerate and it sounds like a coffee can full of rocks, but its not coming from the crankcase.

I am buying a new timing gun too, my old one is well, 20 years old.

[twistedtech]

Ok here's the deal as short as I can get it.Stock timing is 0,the pcm controls the spark curve and advance.IE,base at 0,total full in timg under load at lets say 3000 rpm,maybe,30 degrees.Base timing set at 8 degrees,total full in timing,38 degrees.Just because the decal says 0 and the trusty old "do not adjust" line, doesn't mean you cant.Every and I mean every engine is different.The knock sensor will pull back the timing if it's to much,you will hear a slight knock or ping when under load just before pcm pulls back timing,if you hear that take some out of your base timing.There is alot more involved here than just base timing,injector pulse is affected,02 response and I wont go on.Been a tech for 23 years,drag raced for 10,bench raced for 25.I have picked up a few things along the way.Does anyone know why the timing is 0?I'll give you a hint,cleaner emmisions at perfect tdc.Less waste gases to come out the tail pipe.

[twistedtech]

Forgot to re-stress the carbon deal.Coking and carbon build up just kills the combustion in an engine,quick at home fix.ACDelco has a product called Cleens,areosol can, I find the easiest way to get it in the engine is through the brake booster vac line.Get the engine good and warm,start spying into line,going into intake of course,keep the idle just enought to keep it running,use the whole can if you can and don't park it near the house or you nieghbours either,let it sit all nite and in the morn take it out for a real hard drive.You WILL notice the difference.Don't underestimate the amount of crap thats going to come out the tail pipe and it really stinks( unless you have a vendetda against your nieghbour) dont do it near the house.

[DetroitMuscle]

Originally Posted by twistedtech

Ok here's the deal as short as I can get it.Stock timing is 0,the pcm controls the spark curve and advance.IE,base at 0,total full in timg under load at lets say 3000 rpm,maybe,30 degrees.Base timing set at 8 degrees,total full in timing,38 degrees.Just because the decal says 0 and the trusty old "do not adjust" line, doesn't mean you cant.Every and I mean every engine is different.The knock sensor will pull back the timing if it's to much,you will hear a slight knock or ping when under load just before pcm pulls back timing,if you hear that take some out of your base timing.There is alot more involved here than just base timing,injector pulse is affected,02 response and I wont go on.Been a tech for 23 years,drag raced for 10,bench raced for 25.I have picked up a few things along the way.Does anyone know why the timing is 0?I'll give you a hint,cleaner emmisions at perfect tdc.Less waste gases to come out the tail pipe.

Same place im coming from, I had modest mighty mouses for years, now its a v6 with alot of electronic crap. If i adjust the timing, it will just go back to where the ECU wants it, id need to alter the ECU to accomidate the change.

I got 147K and pass smog with ease, I really dont want to change that. I have the EGR unplugged and capped, it didnt notice anything last night but again I dont know what im supposed to look for or pay special attention to.


I am going to change the o2 if for anything just peace of mind, its OE for all I know.

[BlazerLT]

Good man, the O2 sensor is the king of the emission control and it being even weak can cause some definite performance loss.

[twistedtech]

Originally Posted by DetroitMuscle

Same place im coming from, I had modest mighty mouses for years, now its a v6 with alot of electronic crap. If i adjust the timing, it will just go back to where the ECU wants it, id need to alter the ECU to accomidate the change.

I got 147K and pass smog with ease, I really dont want to change that. I have the EGR unplugged and capped, it didnt notice anything last night but again I dont know what im supposed to look for or pay special attention to.


I am going to change the o2 if for anything just peace of mind, its OE for all I know.

Dude,re read it.If you have the tools to adjust the timing up you must have the tools to adjust it back.As for the 02,in my opinion use delco.

[BlazerLT]

Delco's are overpriced and seeing Bosch designed GM's O2 sensor system, I think it is safe to say their sensors are just as good for the cheaper price.

[twistedtech]

Originally Posted by BlazerLT

Delco's are overpriced and seeing Bosch designed GM's O2 sensor system, I think it is safe to say their sensors are just as good for the cheaper price.

Yep,your right.I quit.BlazerLT you are the man,the Genie,Mr FixIt and the Grand Master know all.I have been at this site for just a few days and you AND you alone drove me away.Nice job.If your goal was to undermind every comment, well you did well.Great job.All and ALL questions need to go to Mr.BlazerLT.He has all the answers!

PS.Delco's are cheaper than Bosch & NTK.I have to ask.............Bosch designed the GM 02,so with that said they are the same?Is that right?You have no idea and have never seen one in action have you.!Once again,BlazerLT,you win,Weekend Warrior at best.Want a pissing contest with BlazerLT?Nope!No thanx.He rules!

[BlazerLT]

OMG...just.....*sigh*...WOW!

Anyone have a soother for this overreactive baby taking a hissy fit over nothing?

[ZL1power69]

Originally Posted by twistedtech

Yep,your right.I quit.BlazerLT you are the man,the Genie,Mr FixIt and the Grand Master know all.I have been at this site for just a few days and you AND you alone drove me away.Nice job.If your goal was to undermind every comment, well you did well.Great job.All and ALL questions need to go to Mr.BlazerLT.He has all the answers!

PS.Delco's are cheaper than Bosch & NTK.I have to ask.............Bosch designed the GM 02,so with that said they are the same?Is that right?You have no idea and have never seen one in action have you.!Once again,BlazerLT,you win,Weekend Warrior at best.Want a pissing contest with BlazerLT?Nope!No thanx.He rules!

dude LT was just stating his opinion and trying to save you (or someone else) money by purchasing a bosch sensor instead of an ac delco. personal attacks are not nessesary and will not be tollerated .