Got my car tune and dyno bout 1month ago and been having problem with it..when i try starting it up...everytime like when i leave the car sit for like 1-2 or more day..and when i start it up it like have a hard starting but it fire up and run..when its up and runing it like idle ruff and bounce like 1500 -2000 up and down.i check all my vaccum line, leaks,and air bubble from my coolant everthing all good...and yesterday moring when i went and start up my car it'll start up but it'll idle really ruff..and when i give it gas it'll bog out like there no fuel going though...plus it wont rev up high when i put in 1st gear and go..ill have to let it idle for few min for me to go...for it not to bogg out on me..but my fuel gauge psi sits at 43psi...but when i leave it idle and dont give it gas for like 2-3min then it will idle fine and when up give it gas it'll rev up normal...but will still bounce up and down 1500-2000rpm...so as for right now my car wont start but crank over and everthing...i check all ground,good spark,fuel going though..and everthing...so lmk what you guys think..thanks

 

Check engine light?

 

no check engine light.... running a p28 s300..

 

swap ecu to p72 if its obd1. Sounds like a botched tune.

 

id go back to the tuner

 

ill try that but..what do u mean botched tune?lol

 

meaning he didn't know what he was doing. He could have had it running too lean and trashed it. Look at your plugs. They are your eyes in the engine.

 

Call your tuner. Sounds like as the weather is getting colder you're having some diffculty with your tune. Was it street tuned or dyno tuned?

 

it run fine and everything..when the motor all warn but still idle up and down like i said..but there sometime the idle go away but not for long..

 

agreed with grumble.

 

Are you datalogging? What are your AFRs reading?

 

it was dyno tune..

 

Then you got ripped off. Call your tuner.

 

not running a afr/wideband..but when i got it dyno and tune they hook up there...i need to get one tho...

 

ill have to give them a call!!!

 

Are you datalogging? Please don't be one of those people that can only answer one question at a time.

If you're not getting any CELs chances are your tune needs a retune. Did you do anything prior to this happening?

 

I just thought of something. Check your TPS. That's all I got.

 

as for now my car wont start..and plus this is my 1st time using the s300..so..yea. would i be able to get any reading off when i datalogging it when it wont even start...the only cell pop up when my car was running that time was my crank angle sensor only but that comes on sometime only..plus im not even using that sensor and not even hook up...and it still come on sometime..and my guy that did my custom engine harness tuck he delete that sensor also..

 

how would i no if the tps is good or not?

 

multimeter...

 

could be anything with a tuned car, but also sounds like it coud just be an iac valve as well.... I duno fig. id hrow that out there, random idle was always my iacv...

 

lol....i check my spark plug and found out they where brunt...so i change it to my other set i had and it fire up!!!now since that happen to my plug what should i gap it at cuz my old set that were brunt were gap at 30...they were all black..how would i know to gap my plug and know thats good for my set up?

 

What heat range are you running?

 

you mean my temp gauge..well when im running the car or driving it for like hrs...it stay under half it wont got on half or over half sit at like 1/4 b4 half..(itf that what ur asking bout my heat range)

 

No. I mean what range are the spark plugs? Are you new to turbocharged cars? Your plugs should not be looking like this if you got a real tune.