This been happening for a while, i really dont have any time to screw with itm by the time i get off work and the engine cools off its dark...soo id like to get this taken care of this weekend if possible so i need opinions/ideas

heres the problem, when the car is under a load, any gear, it will hesitate/sputter/sometimes i hear a pop from the drivers side, seems to be worse the lower the rpm, its kinda like say im in 3rd gear about 1500rpms ill push the gas pedal lets say 50%, its feels ok, i push it 60%, it does not accelerate any faster at all...i push it 75% it will start the sputtering crap, still not accelerating any faster than it was at 50%..if i was to just floor it itd sputter like crazy at those rpms still not any more acceleration than 50% throttle, but as the rpms rise the sputters would happen less often and less harsh...so it doesnt do it AS bad the higher the rpm or when the engine is cold. so basically i have no torque, which makes it take somewhat more effort to blow doors off of dipshits on the road

ive read alot and the people closest to having the same problem as mine said it went away after replacing the crankshaft positions sensor, not sure what all is involved with that but guess ill be giving that a shot...ive checked my plug wires, they dont seem to be loose, and no burn marks...also the bottom of each header is flattened out a little...can get pics of that tomorrow. sounds like theres a slight exhaust leak where the drivers header meets the y-pipe,, also can hear what i would call piston slap (sounds like someone having sex under the hood) but that only happens right after start up hot or cold and is worse when its completely cold, but goes away...the guy i bought the car from said he ported the TB but i havent really looked at it, maybe something isnt sealed correctly...and ill also pull the O2 sensors out to see what they look like, any ideas?

if i rev the motor in neutral its fine, idle is fine it doesnt surge or anything, but when im sitting at idle i can see the shifter start doin a dance every once in a while but i dont think thats bad, i think thats just crap tranny/motor mounts...i can say when the motor is decelerating in nuetral while im moving the rpms seem to float almost and it sure does take a while for the rpms get down to idle, dunno if thats related

EDIT: Found this a while ago but never posted, found one of my plug wires was literally hanging on by a thread, it looked normal until I touched it and it came apart.

 

02 sensor(s)

Get a scan while the engine is running to verify they are failing before you spend any money on parts.

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Sounds like you just need to clean your MAF. (When contaminated the MAF will not read all the air coming in and will cause the engine to go lean.)

You probably have a K&N air filter, right?

 

Check 02 sensors
Check Spark plugs/wires
Clean throttle body/MAF with cleaner

I've had hesitation, surging, sputtering and acceleration problems all due to those at some point or another.

 

where can i have someone scan it thats open saturdays, rather not do a dealership..

if i just pull them out and they're covered in white doesnt that mean i need to replace em? or does that mean theres a different problem

 

nosir i changed the paper filter with another paper one when i got the car 2months ago but ill clean it

 

try this...unplug the maf sensor and run the car like that. if the problem goes away then its your maf sensor. at that point clean it good.

 

well i cleaned the MAF and TB and took the giant piece of cardboard off my radiator, also found a tag from a shirt or something tucked up in there lol, MAF wasnt that dirty but the TB was...if definetly helped, but the sputters still there

 

Sounds like you have driven through a couple of Dukes of Hazard episodes... Maybe you have some cut wires. Have you checked for codes?

 

1.check for codes.
2. disconnect maf sensor and take it for a spin and see if still happens.
3. check your pvc hose's for leaks/tears.

 

It can't be a dirty MAF...the MAF does nothing until you go WOT. Your problems are at part throttle, normal driving.

Cracked spark plug
bad wire
dirty fuel filter
dirty fuel injectors
leaky fuel injector(s)
PCM trouble
ground wire might be loose somewhere
and a bunch of other things.....

But a scan is needed to see how the 02 sensors are switching with the engine running.
MY dealer scans for free usually, depends on how busy they are. But other shops have the real OBDII scanner.......

Also, failing 02 sensors will not give you an SES light or a code till things get really bad.......

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lol thats dallas highways for ya...

when i was changing the oil i noticed the O2 wires are pretty damn close to the headers and i wouldnt be suprised if they touch the headers when im driving hard, the passenger side O2 wire looked pretty rough the drivers side had some heat wrap around it which dont make sense to me if the pass side is bad cuz everytime it pops its on the drivers side...i just got it inspected they hooked it up everything passed and i saw a section where it said O2s passed but i dont know how much i can actually trust that

 

well at WOT it does it to, really just depends what gear/rpms im at if the cars under a load and i give it to much throttle it sputters...but i dont think its the MAF either cuz i just cleaned the hell out of it and i didnt see anything wrong with the elements, and it still sputters, just not AS bad

also just by revving the car it acts fine, has to be under a load to sputter, so would hooking up a scanner just letting it idle do me any good?

 

i have the same thing. only under wot its fine normally, and sometimes it just runs fine all day... i dont know.