my TA has a misfire i cant find, ive done plugs wires and check for vacuum leaks. please ! if anyone has a tech 2 scanner that will show us what the car is doing instead of just give me the basic p0300 code, i will be grateful!

i can

- give you cash
- buy you a lap dance at the local titty bar
- give you lq9 pistons/ rods
- pay for your beers at the local titty bar
- give you a set of 317 heads from an lq9

pm me

 

Where are you located. I don't need anything..lol I have a snap on but read out tells u everything. What exactly did u get on the other.

 

Well there ya go Erik!

Located in Hurst, TX.

 

im in fort worth,

i have hp tuners and it will give me codes, and i can scan but i dont know enough about it to watch it scan and really understand what the car is doing. its just lines going up and down to me.

 

im in plano and I have a couple different scanners, im actually a diagnostic tech for BMW. try running some injector cleaner through it, make sure theres no crank or cam sensor codes. P0300 can be tricky, drive the car somemore eventually it should be able to determine which cylinders are missing. how does the car drive, like poo i imagine???

 

P0300 is a random cylinder misfire, usually a bad injector or vacuum leak

 

i have cleared the codes a few times now and still get the p0300 code. the car will start fine, search for steady rpm alittle 500-800for about a minute, the water temp gauge will move up and done almost in unison with the tach needle until it reaches operating temp. it runs rough and starts to clean up over 1200 rpm, if i get into it nice and steady it pulls hard, but if i try to punch it, it acts like its loading up on fuel/ cutting out. ive searched for vacuum leaks, fixed one, cant find any others. replaced plugs and wires.

 

thanks for stating the obvious.

 

An oxygen sensor with some exposed wire that gets dripped on by the A/C can cause that. Ask me how I know..........

 

Intake leak or fuel delivery issue. In my experience, a random misfire is almost 90% of the time one of these 2 things. Check for cracked intake, bad intake gasket seal, basically any opening after the MAF that would be allowing unmetered air into the engine...Secondly check fuel pressure, make sure it holds steady and blip the throttle a couple times to make sure it recovers well. Only other things to look at after those and the things you've tried would be cam/crank sensor issues...They can cause a random misfire, but usually have a correlating code w/ them. You can ohm out the resistance on the sensors, just look up the specs in a service manual. Hope this helps.

Paul

 

OP i have a tech2 and work at the deaership for chevy pm me your number

 

pm sent


sea foam has helped a bit, plus its almost 20 degrees cooler tonight

 

We can pinpoint the issue at the shop and we have a more advanced scanner as well. Let us know if we can help you out.

 

hose down the intake manifold with some brake clean, thats how i find vacuum leaks. wait for the engine to suck in some brake clean instead of air then youll know where your leak is noticible difference in RPMS

 

check your pm's bro

 

oh i just noticed it sorry, illl call you tommoro morning