problems

[henry tanner]

i have been having trouble with the st last couple of days. i will go to start it and it would idle ruff. when i hit the gas it would shut down. if i turn it off a couple of times it would still do it. i have to let it sit then come back to it. and now problem until the next day. :angry::banghead: what am i missing. less than 81,000 mines on an 03 xlt. pulgs have been done fuel filter two years ago, fan cluch, belts. brakes, shocks upper and lower ball joints and new tires. i don`t drive that much. any ideas?:sad:

thanks

hdt

 

[Scott Tanner]

you need to clean your IAC Valve... See projects section

 

[Richard L]

Not much to go on, but most idle problems are cause by the IAC (Idle Air Control) valve. As STanner suggests, I would clean or replace the IAC and see if that does not solve the problem.



...Rich

 

[TrainTrac]

Any "Check Engine Light" codes?

 

[henry tanner]

the only check engine light i get or got is small evap leak.

 

[swshawaii]

After IAC, check this PCV hose, especially the bottom side.

Evaporator leak is possibly the charcoal canister vent hose.



[Broken External Image]:

 

[EddieS'04]

will go to start it and it would idle ruff. when i hit the gas it would shut down

Im thinking fuel pressure. Either the pump or fuel rail regulator. I think the '03 has a shrader valve on the fuel rail. Have the fuel pressure checked.

 

[henry tanner]

cleaned the iac vavle, checked the hose on the pvc vavle. i will let you know haven`t started it up yet. i putting on an intake tommorrow. then going to reset the ecu. keep u informed.

thanks

hdt

 

[Phil Frady]

Based on the pic provided by swshawaii, check that elbow and then follow it to the back of the manifold and there will be another elbow to check as well. Check the entire line from throttle body to PCV. It's a cheap little elbow(s) to replace, once you get to them.

 

[scott degroot]

Take Eddies advice on this one and if I were you I wouldn't do any modifications like the intake you want to install untill after you get it fixed.

 

[Kevin Palmer]

I agree that you should do NOTHING to the intake until you solve the idle issue.



Bottom line is, you can have all the goodies in the world and best modification out there, but unless you have good base engine (good spark plugs, no vacuum issues, good ignition, ect, ect) then all you will have is an engine with a miss that has come at a substantial cost...

 

[henry tanner]

checked all hoses and eblows all good clean troddle body, cleaned iac vavle, installed new intake and reset ecu. so far so codes runs good and no codes right now. knock on wood. i will replace the pvc vavle next. less than 81,000 miles and doing good.

thanks

hdt