mysterious miss at idle and wont rev up

[DUI]

so ive had this gsx for about a year now without any problems. last weekend i took the rims off of it and replaced with studs. i let the car sit in the same spot until monday. when i went to move the car, it had a hard time starting and once it did the idle was very rough (sounds like a miss, no backfire) and wanted to die. it will rev up to 2500k slowly until it sounds like it just isnt going to rev any higher (blow up). ive done a full tune up on it, checked the injectors, fuel pump, spark test, compression test...everything checks out ok, no codes. i know its getting spark, i know its getting fuel...maybe to much fuel? and i know its getting air. this is very random and will not get better once warmed up...any ideas? thanks guys

 

[talons]

its odd that by changeing tires this happened. could MAYBE be the ecu or if you touched absolutely anything else check it. do you know if its one cylinder missing or multiple?

 

[DUI]

i didnt touch anything on the car before or after me changing the tires. when i parked it on friday it ran fine. started it on monday and ran like shit. it does sound like multiple random misses for all cylinders. i know the spark is there but everytime i check the plugs they are black and sooty like there is unburnt fuel. i did install an alarm on it over a month ago and have had no problems (i am a certified installer). i have now disconnected the alarm in hopes that would fix it, no go. any ideas?

 

[DUI]

any help would be greatly appriceated.

 

[willydsm]

Sounds like it may have jumped timing by a tooth or two? check your timing.

 

[DeadsEvolution1]

I am having a mis fire. my car sounds like a WRX does with exhaust!! If you figure this out let me know
So far I have replaced
The ECU
Injectors
Spark plugs and wires
Redid the timing.
Set the base timing to 5BTDC
replaced the CAS
checked compression and replaced the resistor pack

To do is
Transistor plug
Coil pack
Test pulse on the injector plugs

Just letting you know what I am doing to find my problem

 

[aparker]

Have you checked the spark plug wires? Make sure they are on the correct plugs. Hopefully just something that simple.

 

[this_tsi_8urV8]

Check fuel pressure, when mine was too high bc of blockage, the idle was funky, but not that bad.

 

[bomper04]

Get a 1) spark tester and test for spark on all 4 cylinders 2) Injector balance test, monitor pressure drop cylinder to cylinder and numbers should be consistent with one another. If those are okay, get a hold of a digital oscilloscope and check injector firing patterns. Also, if you know anyone that has a exhaust gas analyzer, it would most definitely help you pinpoint a certain area.