ok i have a 99 se and for like 2 weeks its been having a rough idle, my dad thought it was the fuel injectors, so i ran so ams fuel injector cleaner through twice and it still runs rough and even on the road at about 50 mph. when i take off from a yeild it almost doesnt do anything and then hesitates and takes off real fast. what could it be i need a alternator (which will be done monday) and a knock sensor(also monday) could it be the tranny or fuel problem. it doesnt do it in park alot. sorry its so long but wanted all the details so pleez help me.

 

Check your CEL if one is on? Knock sensor could cause this but it's highly unlikely. What's your car's mileage?
-Cyrus

 

my miles are 162,000 miles and the cel is not on, btw my car is an auto

 

could me many things, could be your TPS, or maybe need to clean the Throttle and IAC valve.

a bad coil?

 

new coils(all 6) and what is a tps sorry im car illiterate, the throttle was cleaned this morning by my dad, he took evrything out and cleaned evry little piece and put all back together.

 

whats IAC valve and TPS????????

 

dam n i wish my dad would do the labor for me...

 

I had the SAME exact symptoms as you described, I changed plugs, and fuel filter, it turned out that my EGR valve was stuck open. Very easy fix... Stuck my finger in the acuator, pushed it until it slid back down. Youre done.

 

sorry for bein so stupid but where is my egr valve located, im very very car illerite

 

iac: idle air control valve. Follow your air intake until you reach 1 verticle sensor harness right by the firewall, about 8" medial to the brake booster. It's held by 2 10mm bolts. Once you get that off, you'll hafta take off another 8mm bolt that's holding another harness (once you get it off, you'll see what I mean. Then take a phillips screwdriver and take off the actuator. Clean everything, reassemble, and you're good to go there.

TPS: throttle position sensor. Too lazy to look up how to prep it. Wade through my website to find the FSM.

BTW, take your car to autozone, kragen, pep boyz, or any repair store and ask them to scan for ecu codes. Then report back to us the codes they find.

Jae

 

ok thanx so its probably the IAc and tps thats makin my car like that hope its not the tranny cuz im almost broke after the ks and alternator comin this week.

 

It's 3 10mm bolts not 2. If you can't find it, it's the thing that has the colorful connectors on it. In the rear of the engine bay by the firewall like said above.

 

oh, duh... 3. my bad. thanx DAVE for the cover!
Jae

 

if it was your egr...wouldn't it trip the cel?

on another note...is there any how-to on how to clean the egr on our cars and not have to pay a shop $125 to do it?

 

Hmm a 99 with hesitation and idle problems COIL PACKS

 

-they are already done and today my car still hesitates slightly cuz i put injector cleaner in it last nite. could it be the auto tranny, or some fuel thing. it comes and goes.