Odd acceleration issue 0n 4.3 vortech

[Nitekry]

Sometimes is seem fin but quiet often these day on acceleration it will work fin for a lil pedle but when i hit the pedle down it is like the engin is being strangled power and RPMs Drop if i keep it held down it will almost die.
no lights or codes and idiots at the dealer want to rebuild the engine when that was done only 40k miles ago.
has full compression, fule pressure, fire, etc.

anyine ever had this issue before.

[dmbrisket 51]

time for a basic tune up, sounds like you might have a misfire, you say you have spartk, but so did i on my fullsize and when i pulled the plugs out the porcilin was missing on some plugs, the cap i was jsut amazed i had spark after seeing how that was... so pull the cap and roter off look at them and check your plugs and replace the wires never hurts

[Nitekry]

Well all of that is new for the most part just put new coil on it as well and heavy insulated wires. plugs only have 40k on them

[Fractured1]

How's your converter...could be blocking up...

[dmbrisket 51]

hmm... yuve got me, ill ask around and see what i can come up with, sorry i cant be more help

[Nitekry]

Checking back to see if any 4.3 vortech experts have seem my issue.

short of replacing all of the sensors most of the electrical system is new
still loses power when i put the peddle down like the enging is being strangled

[TIMOTHYHEMPLE]

Get A Tech Manual And Check Your Pick Up Coil In Your Distributor

[Mikado14]

Check your fuel pressure and go from there.

[hondaracertj]

take off your mass air flow sensor your check engine light will come on but it wont hurt anything then drive the truck thats most likley your problom if it is your choice you can leave it off or buy a new one but you dont need to run it if you can deal with your check engine light on

[BlazerLT]

Originally Posted by hondaracertj

take off your mass air flow sensor your check engine light will come on but it wont hurt anything then drive the truck thats most likley your problom if it is your choice you can leave it off or buy a new one but you dont need to run it if you can deal with your check engine light on

What the hell are you talking about?!!

Our engines need the MAF sensor to run right so in the future, if you don't know what you are talking about, then can the bullshit and do not post at all.

Jesus, yea dude, remove the MAF sensor, like, the engine doesn't need it.

WTF are you thinking? It is one of the most important sensors on a 1996+ 4.3L.

[BlazerLT]

Originally Posted by Nitekry

Well all of that is new for the most part just put new coil on it as well and heavy insulated wires. plugs only have 40k on them

Explain all the new stuff you have used for your tuneup.

[jackass#1]

same problem , good tune up, air and fuel filters, coil,
new map, and still had the same prblem. also timing was good. checked fuel pressure and gage read 10psi, which
is somewhere inbetween. 3 months and could never figure it out until the fuel pump went out. changed it
problem fixed. dont really understand how i got
good pressure reading with a weak pump. i guessing
but at idle it was fine but on acceleration it just couldnt keep up pressure. does that sound like a good guess on why i had good pressure reading?
well i hope that might help.

[BlazerLT]

Originally Posted by jackass#1

same problem , good tune up, air and fuel filters, coil,
new map, and still had the same prblem. also timing was good. checked fuel pressure and gage read 10psi, which
is somewhere inbetween. 3 months and could never figure it out until the fuel pump went out. changed it
problem fixed. dont really understand how i got
good pressure reading with a weak pump. i guessing
but at idle it was fine but on acceleration it just couldnt keep up pressure. does that sound like a good guess on why i had good pressure reading?
well i hope that might help.

I am talking to the thread starter.

[movin2stereo]

Originally Posted by BlazerLT

What the hell are you talking about?!!

Our engines need the MAF sensor to run right so in the future, if you don't know what you are talking about, then can the bullshit and do not post at all.

Jesus, yea dude, remove the MAF sensor, like, the engine doesn't need it.

WTF are you thinking? It is one of the most important sensors on a 1996+ 4.3L.

Do they even run without the MAF?

[BlazerLT]

Nope, in most cases the engine will die immediately if you disconnect it.