Qis30003

Thanks a lot you were a lot of help

Your right i'm not a tech, but I am about to give up on this and send it to another mechanic to find out what is wrong with my car, but i'm pretty sure it's one of the problems you mentioned, thanks for the help. but about my last question do you know if i install an aftermarket deck in my car would it disable my existing oem gps?

I'm quite sure just because they took off the valve cover for me and showed me the the dots that are supposed to connect some where near the water pump and the 2 dots that are parallel going vertically up, am i correct? but after you told me about the IACV i went to go look for it and i unscrewed this thing on the throttle body i seen a mechanic play around with once which has 2 Philips screw holding it in right in front of the TB and played around with that, but after i did that the check engine light came off but still idles a lil rough but a lot better but when i drive the CEL starts blinking again

I see that you took out the IACV and cleaned it out and you said the problem went away, What was the problem you were having if you don't mind me asking? i know this post is a few months ago but i was told to clean mine out because i'm having misfire problems in cyl 1,2,3

I'm not sure about that but to my understanding IACV is Idle Air control Valve correct? where would i locate that valve?

Hey everyone, I'm a new member to this forum but a Lexus owner for 2 years now IS300/03 5sp 120mil, I enjoy the ride and the power but now just lately i stumbled into a problem which my Mech and I can not figure out. Here is the the scenario, The Cel was on for the longest time, i got it check it and it was on e-vap codes so i wasn't too concerned about it so i left for a while till one day i was driving on the high-way then the cel came on and started blinking, when i pulled into the closest parking lot i can hear the car stumbling on low rpm and one of my caskets blew on my Greddy cat-back. Turns out the gasket that blew was the on right after the 2 cats. The very next day i brought my car to the shop to get the exhaust fixed thinking that was the only problem i thought i might as well throw in the new clutch, timing belt, water pump and acc belt all at the same time. After thinking getting all that done my car would run mint again but it didn't it ran even worse for some reason, every time i would clutch the car would want to stall and every time i clutch to change gears it would bounce my tach meter very abruptly, My mech told me to unhook the starter alarm bc that might be causing the problem to that, but to top that off the car was misfiring cylinder 1, 2, and 3. It had trouble driving up to 4000-6000 rpms I disconnected the alarm/starter and changed the gas with 94octane with lucas injector cleaner and octane booster, the tach worked fine after that and the engine ran a lil bit smother but now the main problem is my cel is still blinking and we checked with the scanner again and the car is misfire in cyl 1,2,3 still, I changed the sparkplugs NGK Platinum and check engine compressing, results were 200 psi all cylinders, swapped the coil packs around to see if that was the problem, swapped the injectors around, cleaned out the air flow meter, the only thing i can see that was no working well was the signal to the injectors, we hooked up a nod light to check the signal and cyl 1,2,3 the signal was weak and 4,5,6 the signal was much stronger. from here i don't know how to proceed. Oh yeah on the scanner said O2 sensor was reading lean any advice or tips?? i might think i have to change the ecu but still not certain what the main problem is and to top everything off does anyone know if i can install and aftermarket deck in my car without losing the stock gps system? the 6 cd changer is broken