Acceleration issue 95.5 250kmiles

Looking for some experienced input, just bought this 95 with 250k miles, prev owner installed k&n short ram no other known engine mods, during acceleration I get a hard bog right a 3k rpms neutral and every gear. It's almost like a fuel cutout/rev limiter. So far changed plugs and fuel filter, trying to find a stock air box and maf to swap out but tried unplugging maf and still get same issue so not sure if that's it. Thinking injectors are bad.
Anyone have any ideas/ parts they can help me out with. So far local junk yards don't have much to offer. It's really trial and error from here but don't have accessibility of parts. Any help will be much appreciated

 

im told the sensor gets dirty and needs cleaning, don't think unplugging it solves that. also make sure they didn't disconnect other stuff under the hood.

also I read over and over again that the k&n let too much dirt pass them and dirty the sensor as well as not be good for the engine so you should not use one. its even worse if its an "oiled" filter as the oil plus dirt gets on the sensor.

use a "sensor safe" solvent and spray the sensor clean and put the stock airbox back on it and a you can put a reusable washable filter on it.

try the salvage yards for the airbox, its your best shot short of buying new one since most people now know its better to keep the box then get rid of it.

 

Yea sorry forgot to mention used maf cleaner on it already no change.
Just reread ur post that oiled filters are even worse.... The filter is soaked with oil. When I took the maf out my hands were dripping with filter oil from grabbing the filter. I'm hoping the issue is the maf just need to get an extra one and stock air box.
The other thing that it bogs at any throttle %, I can downshift and let it rev higher than 3k rpm but if I press in the throttle it doesn't do anything until it decelerates to 3k then bogs hard. I can accelerate full and partial throttle up to the 3k mark.

 

you may havre other issues too but first get rid of that crappy filter and degrease the box and ductwork of the oil.

it might be best to take it all down (ductwork and throttle body) and be sure its all clean, oil free, and dry then check all your vacuum hoses before you start replacing sensors

if its working then replace the sensor and you should have a better fuel air mixture and run better

 

Can someone post a pic of vacuum lines and sensor plugs. Apparently the Tps plug has another gray plug right next to it that's not connected into anything. Can't find any other plugs not connected.

 

swapped out maf yesterday, no change. sanded down injector ground, no change. have cel so going to check the code its giving

 

all vac hoses look to be in place and not loose or leaking. there is the one plug that is not plugged into anything, gray plug attached to harness to TPS plug...

 

got cel, checked codes got the following
P0340 camshaft pos. A
P0100 MAF A Circuit
P0110 Intake Air Temp Sensor
this was the night before i swapped out the MAF but even after the swap it didnt fix so has to be another issue. any ideas on the camshaft sensor?

 

mod can you move this to technical?

 

well I suggest you disconnect the battery overnight to reset the codes then see what reappears, some of that may have been solved by your efforts but the codes weren't cleared

 

NOTHING WORKS! whaaaah
Can someone post up a picture of their vacuum lines? also the TPS plug and if there is another gray plug next to it i need to see why mine isnt plugged into anything. every picture ive seen of a 95+ 3.4L engine bay there is one prominent vac line coming from the intake in front of the MAF and wraps around the manifold... what is that line? i certainly dont have that. Instead there is a 3way connector that has a bunch of lines connected going into the compressor. this is so frustrating.
today I changed the Camshaft position sensor nothing changed. unplugged the TPS got a code so thats working. the only other thing is vac line. i feel like if its the Cat or O2 Sensor id have a code already
I havent yet changed the PCV valve... and all the vac lines are old and cracking but still seal.
someone help me!!!!

 

mysterious plug

vac set up

 

do you have the a/c throttle solenoid? that could be what that plug is? when the a/c kicks on the solenoid adds a tad of throttle so it doesn't idle too slowly from the extra drag on the engine. it kicks on with the compressor so turn a/c on and see if idle speeds up. if it does then its not for that and that's not it.

don't overlook vacuum lines, they can look sealed and still leak so if they are cracked replace them all and eliminate that from giving you headaches now or later on.
search youtube videos, most all of em are the 6 cylinders so you should see several video dealing with that area and maybe you can find if the plug is supposed to be unplugged or if you have a missing doo-hicky

 

can someone please post up a few pics of their stock vac setup and what that plug is for? as of now the a/c doesnt work doesnt even kick on so thats another problem for another day.

 

You're sure about that?

 

i assume you mean it doesnt blow cold air but the fan and stuff works inside the truck.

if its low on Freon it wont kick on, when you feel like checking it try jumping the low pressure switch and if it comes on then add a can of Freon.

agreed, I told him already to spend $5 and replace them but he hasn't done that yet even though he probably spent over $150 on other things.

Kocho333 even if that's not the problem you will need to do this after fixing the problem so why the delay, change the hoses, its the cheapest repair attempt option you have left so DO IT ALREADY please.

we want to help you solve this but you cant make assumptions or decide NOT to fix things because you don't think that's the problem. I agree it probably wont help but it will let us rule that out as a cause and after all we aren't suggesting you do anything that isn't something you have to do anyway. and trust me, I guaranty you, if they are cracked then they ARE leaking

 

does anyone have a link to decent vac lines? local autozone is getting kind of pricey
nvm found on Amazon

 

found a stock airbox, K&N drop in filter and an airaid intake tube and hopefully with new silicon vac lines i can solve this damn issue. I will install vac lines first then intake see which will hopefully fix it. I still think its a vac line that is missing or crossed due to the short ram intake, everyone else's intake has a pre MAF vac line(from the airbox), this current set up does not.

keakar thanks for your input thus far sorry for driving you mad about vac lines lol as for the a/c the compressor doesnt kick on, Prevowner mentioned something about filling freon but also said it hasnt worked for a good year. im not concerned with this at the moment.

I still would like a pic of someones vac lines, particularly the pre MAF(from the airbox) line that goes across to drivers side of engine bay, cant find a pic of where that goes.

 

Ok one more request for vac line pics. The line that comes from air box I need to know where that goes... can someone help me out with that?

 

the big line on top side next to the radiator hose you mean? that connects to the cross tube on top of the radiator and the other end runs to the charcoal canister on drivers wheel well