I just got the car back on the road with bigger injectors intake and exhaust and have a tune.. Now I have no midrange power and all and at idle the car keeps trying to stall.. The check engine light keeps blinking also.. Can someone tell me what this could be from? Bad o2 sensor maybe?

 

Go to a local auto store and have them check the code and report back. Most auto stores will check them for free

 

Flashing CEL is a Massive Missfire.

 

Need more Info....What size Injectors did you get 48lbs, 80lbs or 60's? My old SS s/c would die at times while idling and I cleaned the TB and the MAP and it helped quite a bit, Could also be the Tune needs some tweaking if their 60's or higher.....You have to really dial those Injectors In Right.

 

Alright I went to advance and got p0204 which is injector 4 an a p0300 which is random misfire.. The mods are the car is maddab header dc sports intake 60s 2.8 pulley and ca heat exchanger

 

dis right here

 

Get it fixed..driving with a misfire is no good

 

did u do one step colder plugs?

 

Sounds like there could be an issue either with one of the injectors or with the tune. I'm not an LSJ but with my 60s I throw the p0300 code all the time

 

I did do one step colder plugs

 

i had one massive misfire and got new plugs and changed a dead o2 sensor i had.

i do have a hard code for P0300, idk really its just always around...like its my best friend

so no CEL but when i scan with my interceptor there it is haha

I usually get it when i have exhaust leak oddly enough, and i do have one i hear it ticking at me

 

a p0204 is an injector control circuit fault.......you need to check and make sure you didn't pinch a wire on the fuel injector harness.....check for an open or short to ground. A bad control circuit would cause in inoperative fuel injector and cause a misfire.

 

I get P0300 on cold starts...sounds like i have cams

 

yeeee my car idles like its got a mild cam hahaha

 

Well I just found out my spark plugs are way to hot. I put a voltmeter to my harness and injectors and both checked out so now I'm going to find me some one step colder plugs which are NGk bkr7e and see how that does for me

 

yea do the cheaper stuff 1st. gap at .35 or whatever u desire. i think mine are .35 its been awhile haha

 

did you try shaking the harness while you were checking it and what plugs are in it now

P0204 Injector 4 Control Circuit -PCM

 

Well if it's setting the control circuit code as a hard fault.....the plugs will not fix it.

If you are sure the harness is good.....and the injector is good.....you need to check the engine side of the harness for a short. There was a bullitin for the harness rubbing on the bracket for the a/c line.

 

I replaced the plugs and it started running good the idle was jumpy soo cleaned the maf and throttle body now it's still jumpy and the cel came on. I'm gonna buy a scanner this week and figure it out but it's not detonating anymore which is a good atart