35th camaro

having probleme tunning after 402 ,cam 236-242, patriot 3 heads, long tubes, caths, ported tb, every time i start it stalls then i have to push the pedal to start again and keep it reved until it decides to idle again, my tuner has tried almost every thing, any sugestions.

racecar

Check for codes. If it has been running for more than a second, it will set some codes if something is wrong. That's where I would start. Maybe check fuel pressure.

z28241

iTrader: (13)

Possibly bad IAC, my car was doing similar things and put it on a scanner, IAC was failing..plus o2 sensor on rt bank was crapping out, not enough to through a check engine light, swapped both out to new and car is much better now.

35th camaro

spent another day at tuner and another 7 hour drive to get there,3rd time going no luck, fuel pressure is 64lb , just replaced both 02s before going this time,seems like he tried every thing electronicly, mayby a mechanical probleme, going to replace my ported tb and different idle air control with a spare stock one i have to see if makes a difference, if any body has seen this before please help, my tuner taught it was inj. tuning probleme(racetronix 42lb tri cone nozzle).

35th camaro

anybody???

HUNTER02SS

iTrader: (24)

Fuel pressure should be set to 58psi. I know i say this alot, but did you tune the VE and MAF tables and if so did you do it with a wideband 02. It is important that you get the fueling correct first and then work on the idle tuning.

BLK02WS6

iTrader: (2)

Maybe you need a new tuner...

35th camaro

changed the tb did not change a thing, put back my ported and drilled the hole bigger, seems mutch better, i just have to touch the gas a bit and starts witout flooding, before i drilled i watched on my scanner and seen the iac number pass 200 counts on start up, so i figured it wanted more air, only thing now it wont idle below 800 because the iac is at almost 0 (not that i want it below 800) but tried to bring the idle lower and could not comanded to. is ther any mod i could do to the iac to control more air?

35th camaro

have put more miles on car and is mutch better.

HUNTER02SS

iTrader: (24)

There is absolutely no reason to drill the TB Blade to get your car to idle. It is a idle tuning issue.

Sh0wGoAt

+1 tuning still requires more than a laptop. in some situations drilling the blade needs to be done. but you need to be sure with your fueling first. once you drill the hole its done.

Sh0wGoAt

iac should be in a 60-80ish range or 4% on a etc car. drill the blade to get in that range once fueling in other areas has been tuned.

elias_799

iTrader: (8)

why would you drill a hole in the throttle body

you can bump the idle of the car electronically. it has a idle control valve

HUNTER02SS

iTrader: (24)

Drilling a whole in the tb is for so called tuners that cannot tune the idle.The ecu will tell you exactly what air it needs for the car to idle properly, but you have to know how to use what has been given to you to do so.There are other factors as well. Get your fueling straight first and then work on the idle tuning.

BuffJoeyD

iTrader: (2)

Need a new tuner, should never drill A TB