Throttle plate mod

[ZL1power69]

Originally Posted by agcneo

i did the mod, and it sounds simple. but honestly it seems like a loss of power, it hesitates now untill it hits higher rpms. did i do something wrong??! i have only put 50 miles on since i did it. do i have to wait for the long term memory in the ecu to reprogram itself?

the only thing u can do wrong is to mess with the hole and rivits in the plate. if you just ground the half moon shaped piece off, you should not notice a loss of power. the computer will relearn fairly quickly but when i did the mod, i reset the computer with a scan tool.

[BlazerLT]

A scantool won't reset the computer, it will only clear the codes.

This is a problem with this mod and is why the deflector is there in the first place, it will stop the rush of air coming into the engine which screws up the MAP readings.

[agcneo]

so am i better off putting a new throttle plate back on? the computer seemed to relearn it, and it does have pickup, but my idle is a tad bit higher, and it still hesitates. but when it goes, it goes!

[ZL1power69]

this mod should not cause the engine to hesitate and idle should not change unless you messed with the hole in the plate or the rivits.

[BlazerLT]

It has been known to cause a hesitation seeing the deflector place is there to stop the initial air gush coming in which will screwup the map sensor reading.

[ZL1power69]

what map sensor are u talking about? the 96+ just uses MAF so readings would not be affected by the mod. i havent had any problems after performing the mod.

[agcneo]

all i did was take that plate and grind it away. is it possible that there is turbulant airflow cause by this somehow, that that is causin the hesitaion?? i didnt touch any rivets, or the idle hole. maybe i should have mentionedim running a full K&n with spacer on it.does that help any

[BlazerLT]

Remove the TBI Spacer, doesn't do a thing.

[blazes9395]

Originally Posted by agcneo

all i did was take that plate and grind it away. is it possible that there is turbulant airflow cause by this somehow, that that is causin the hesitaion?? i didnt touch any rivets, or the idle hole.

So what did you do with the riviet holes, is there something in place of them?

[old_master]

Just to clarify earlier posts in this thread... The OBDII equipped 4.3L engines use both a Mass Air Flow (MAF) sensor and a Manifold Absolute Pressure (MAP) sensor. Although MAP sensor readings will not be affected by performing this modification, MAF readings can and will be skewed.

[agcneo]

the rivets are still there, not moved, not touched, i just ground off the half moon peice. should i rip all that out and replace the rivets. sorry im makin this simple mod sound so friggen retarted and hard. and the spacer is off now.

[BlazerLT]

Originally Posted by old_master

Just to clarify earlier posts in this thread... The OBDII equipped 4.3L engines use both a Mass Air Flow (MAF) sensor and a Manifold Absolute Pressure (MAP) sensor. Although MAP sensor readings will not be affected by performing this modification, MAF readings can and will be skewed.

Yes, the MAP will be affected when you get the sudden intake without the plate in place.

That is why it is there.

You will get a change from both sensors which will cause the hesitation.

[TheBrettster]

BlazerLT - I should remove my TB Spacer as well ? Even if i'm putting an after market intake on ?

[BlazerLT]

Yes, remove it.

TBI spacers do nothing and have in some cases been proven to actually reduce horsepower.

[TheBrettster]

There went 100 bucks.